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All Textbook Solutions for Precalculus

11AYUIn polar coordinates, the points ( r, )and( r, ) are symmetric with respect to which of the following? (a) the polar axis (or x-axis ) (b) the pole (or origin) (c) the line = 2 (or y-axis ) (d) the line = 4 (or y=x )In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=4In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=2In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. = 3In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. = 4In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rsin=4In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rcos=4In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rcos=2In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rsin=2In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=2cosIn Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=2sinIn Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=4sinIn Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. r=4cosIn Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rsec=4In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rcsc=8In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rcsc=2In Problems 15-30, transform each polar equation to an equation in rectangular coordinates. Then identify and graph the equation. rsec=429AYUIn problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. = 4In problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. = 3 4In problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. rcos=2In problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. r=1+cosIn problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. r=2sinIn problems 31-38, match each of the graphs ( A ) through ( H ) to one of the following polar equations. = 3 436AYUIn Problems 39-62, identify and graph each polar equation. r=2+2cosIn Problems 39-62, identify and graph each polar equation. r=1+sinIn Problems 39-62, identify and graph each polar equation. r=33sinIn Problems 39-62, identify and graph each polar equation. r=22cosIn Problems 39-62, identify and graph each polar equation. r=2+sinIn Problems 39-62, identify and graph each polar equation. r=2cosIn Problems 39-62, identify and graph each polar equation. r=42cosIn Problems 39-62, identify and graph each polar equation. r=4+2sinIn Problems 39-62, identify and graph each polar equation. r=1+2sinIn Problems 39-62, identify and graph each polar equation. r=12sinIn Problems 39-62, identify and graph each polar equation. r=23cosIn Problems 39-62, identify and graph each polar equation. r=2+4cosIn Problems 39-62, identify and graph each polar equation. r=3cos( 2 )50AYU51AYU52AYUIn Problems 39-62, identify and graph each polar equation. r 2 =9cos( 2 )54AYUIn Problems 39-62, identify and graph each polar equation. r= 256AYUIn Problems 39-62, identify and graph each polar equation. r=1cos58AYU59AYUIn Problems 39-62, identify and graph each polar equation. r=4cos( 3 )61AYU62AYU63AYU64AYU65AYU66AYUIn problems 69-72, the polar equation for each graph is either r=a+bcos or r=a+bsin,a0 . Select the correct equation and find the values of aandb .In problems 69-72, the polar equation for each graph is either r=a+bcos or r=a+bsin,a0 . Select the correct equation and find the values of aandb .In problems 69-72, the polar equation for each graph is either r=a+bcos or r=a+bsin,a0 . Select the correct equation and find the values of aandb .70AYU71AYU72AYU73AYU74AYU75AYU76AYU77AYU78AYU79AYUIn Problems 73-82, graph each polar equation. r=cos 2Show that the graph of the equation rsin=a is a horizontal line a units above the pole if a0and| a | units below the pole if a0 .Show that the graph of the equation rcos=a is a vertical line a units to the right of the pole if a0and| a | units to the left of the pole if a0 .83AYU84AYU85AYU86AYU87AYU88AYU89AYU90AYU1AYU2AYU3AYU4AYU5AYU6AYU7AYU8AYU9AYU10AYUIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 1+iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 1+iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 3 iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 1 3iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 3iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 2In Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 44iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 9 3 +9iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 34iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 2+ 3 iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 2+3iIn Problems 13-24, plot each complex number in the complex plane and write it in polar form. Express the argument in degrees. 5 iIn Problems 25-34, write each complex number in rectangular form. 2( cos 120 +isin 120 )In Problems 25-34, write each complex number in rectangular form. 3( cos 210 +isin 210 )25AYU26AYUIn Problems 25-34, write each complex number in rectangular form. 3( cos 3 2 +isin 3 2 )28AYU29AYU30AYU31AYU32AYU33AYU34AYU35AYU36AYU37AYU38AYU39AYU40AYU41AYU42AYU43AYU44AYU45AYU46AYU47AYU48AYU49AYU50AYU51AYU52AYUIn Problems 55-60, find all the complex roots. Leave your answers in polar form with the argument in degrees. The complex cube roots of 88iIn Problems 55-60, find all the complex roots. Leave your answers in polar form with the argument in degrees. The complex cube roots of 3 iIn Problems 55-60, find all the complex roots. Leave your answers in polar form with the argument in degrees. The complex cube roots of 44 3 i56AYUIn Problems 55-60, find all the complex roots. Leave your answers in polar form with the argument in degrees. The complex cube roots of 16i58AYU59AYU60AYU61AYU62AYU63AYU64AYU65AYU66AYU67AYUA ________ is a quantity that has both magnitude and direction.If v is a vector, then v+( v )= ___.3AYU4AYU5AYU6AYU7AYU8AYUIn Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 11-18, use the vectors in the figure at the right to graph each of the following vectors.In Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. A+B=FIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. K+G=FIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. C=DE+FIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. G+H+E=DIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. E+D=G+HIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. HC=GFIn Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. A+B+K+G=0In Problems 19-26, use the figure at the right. Determine whether each statement given is true or false. A+B+C+H+G=025AYU26AYUIn Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 0,0 );Q=( 3,4 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 0,0 );Q=( 3,5 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 3,2 );Q=( 5,6 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 3,2 );Q=( 6,5 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 2,1 );Q=( 6,2 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 1,4 );Q=( 6,2 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 1,0 );Q=( 0,1 )In Problems 29-36, the vector v has initial point p and terminal point Q . Write v in the form ai+bj ; that is, find its position vector. P=( 1,1 );Q=( 2,2 )In Problems 37-42, find v . v=3i4jIn Problems 37-42, find v . v=5i+12jIn Problems 37-42, find v . v=ijIn Problems 37-42, find v . v=ijIn Problems 37-42, find v . v=2i+3jIn Problems 37-42, find v . v=6i+2jIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . 2v+3wIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . 3v2wIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . vwIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . v+wIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . v wIn Problems 43-48, find each quantity if v=3i5jandw=2i+3j . v + w47AYUIn Problems 49-54, find the unit vector in the same direction as v . v=3j49AYU50AYUIn Problems 49-54, find the unit vector in the same direction as v . v=ijIn Problems 49-54, find the unit vector in the same direction as v . v=2ij53AYU54AYU55AYU56AYU57AYU58AYU59AYU60AYU61AYU62AYU63AYU64AYU65AYU66AYU67AYU68AYU69AYU70AYU71AYU72AYU73AYU74AYU75AYU76AYU77AYU78AYU79AYU80AYU81AYU82AYU83AYU84AYU85AYU86AYU87AYU88AYU89AYU90AYU91AYU92AYU93AYU94AYU95AYU96AYUIn a triangle with sides a, b, c and angles A, B, C, the Law of Cosines states that ________. (p. 546)If w= a 2 i+ b 2 j and v= a 1 i+ b 1 j are two vectors, then the _______ __________is defined as vw= a 1 a 2 + b 1 a 2 .If vw=0 , then the two vectors v and w are ______.If v=3w , then the two vectors v and w are _____.True or False Given two nonzero vectors v and w, it is always possible to decompose v into two vectors, one parallel to w and the other orthogonal to w.True or False Work is a physical example of a vector.7AYU8AYU9AYU10AYU11AYU12AYU13AYU14AYU15AYU16AYUKind a SO that the vectors v=iajandw=2i+3j are orthogonal.Find b so that the vectors v=i+jandw=i+bj are orthogonal.In Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=2i3j,w=ijIn Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=3i+2j,w=2i+jIn Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=ij,w=i2jIn Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=2ij,w=i2jIn Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=3i+j,w=2ijIn Problems 21-26, decompose v into two vectors v 1 and v 2 , where v 1 , is parallel to w , and v 2 is orthogonal to w . v=i3j,w=4ij25AYUComputing Work A wagon is pulled horizontally by exerting a force of 20 pounds on the handle at an angle of 30 with the horizontal. How much work is done in moving the wagon 100 feet?27AYU28AYU29AYU30AYU31AYUIncline Angle A bulldozer exerts 1000 pounds of force to prevent a 5000-pound boulder from rolling down a hill. Determine the angle of inclination of the hill.33AYU34AYU35AYU36AYU37AYU38AYU39AYU40AYU41AYU42AYU43AYU44AYUThe distance d from P 1 =( x 1 , y 1 ) to P 1 =( x 1 , y 1 ) is d= _______. (p. 4)2AYU3AYU4AYU5AYU6AYUIn Problems 7-14, describe the set of points ( x,y,z ) defined by the equation(s). y=08AYU9AYU10AYUIn Problems 7-14, describe the set of points ( x,y,z ) defined by the equation(s). x=412AYU13AYU