Problem 1SP Problem 2SP Problem 3SP Problem 4SP: Evaluate sin30 , cos30 , and tan30 . Problem 5SP: Simplify the expressions. a. cot60cot30 b. sin3cos6+cos3sin6 Problem 6SP: For each function value, find a cofunction with the same value. a. tan22.5=21 b. sec3=2 Problem 7SP: Suppose that a farm worker determines that the distance along the ground from her position to the... Problem 8SP: If a 15-ft ladder is leaning against a wall at an angle of 62 with the ground, how high up the wall... Problem 1PE: In a right triangle with an acute angle the longest side in the triangle is the and is opposite... Problem 2PE: The leg of a right triangle that lies on one ray of angle is called the leg, and the leg that lies... Problem 3PE: The mnemonic device "SOH-CAH-TOA" stands for the ratios sin=,cos=, and tan= Problem 4PE: Complete the reciprocal and quotient identities, csc=1sec=1cot=1or Problem 5PE: Given the lengths of two sides of a right triangle, we can find the length of the third side by... Problem 6PE: An right triangle is a right triangle in which the two legs are of equal length. The two acute... Problem 7PE: The length of the shorter leg of a 306090 triangle is always the length of the hypotenuse. Problem 8PE: For the six trigonometric functions sin,cos,tan,csc,sec, and cot, identify the three reciprocal... Problem 9PE: tan is the of sin and cos . Problem 10PE: Complete the Pythagorean identities. sin2+=1,+1=sec2,1+cot2= Problem 11PE: The two acute angles in a right triangle are complementary because the sum of their measures is . Problem 12PE: The sine of angle equals the cosine of . For this reason, the sine and cosine functions are called... Problem 13PE: For Exercises 13-14, find the exact values of the six trigonometric functions for angle . Problem 14PE: For Exercises 13-14, find the exact values of the six trigonometric functions for angle . Problem 15PE: For Exercises 15-18, first use the Pythagorean theorem to find the length of the missing side. Then... Problem 16PE: For Exercises 15-18, first use the Pythagorean theorem to find the length of the missing side. Then... Problem 17PE Problem 18PE: For Exercises 15-18, first use the Pythagorean theorem to find the length of the missing side. Then... Problem 19PE: For Exercises 19-22, first use the Pythagorean theorem to find the length of the missing side of the... Problem 20PE: For Exercises 19-22, first use the Pythagorean theorem to find the length of the missing side of the... Problem 21PE Problem 22PE Problem 23PE: In Exercises 23-24, given the value of one trigonometric function of an acute angle , find the... Problem 24PE: In Exercises 23-24, given the value of one trigonometric function of an acute angle , find the... Problem 25PE: For Exercises 25-30, assume that is an acute angle. (See Example 2) If cos=217 , find csc . Problem 26PE: For Exercises 25-30, assume that is an acute angle. (See Example 2) If sin=1717 , find cot . Problem 27PE Problem 28PE: For Exercises 25-30, assume that is an acute angle. (See Example 2) If csc=3 , find cos . Problem 29PE Problem 30PE: For Exercises 25-30, assume that is an acute angle. (See Example 2) If cot=32 , find cos . Problem 31PE Problem 32PE: a. Evaluate sin60 . b. Evaluate sin30+sin30 . c. Are the values in parts (a) and (b) the same? Problem 33PE: For Exercises 33-38, find the exact value of each expression without the use of a calculator. (See... Problem 34PE: For Exercises 33-38, find the exact value of each expression without the use of a calculator. (See... Problem 35PE Problem 36PE: For Exercises 33-38, find the exact value of each expression without the use of a calculator. (See... Problem 37PE: For Exercises 33-38, find the exact value of each expression without the use of a calculator. (See... Problem 38PE: For Exercises 33-38, find the exact value of each expression without the use of a calculator. (See... Problem 39PE Problem 40PE Problem 41PE: For Exercises 39-44, determine whether the statement is true or false for an acute angle by using... Problem 42PE Problem 43PE Problem 44PE: For Exercises 39-44, determine whether the statement is true or false for an acute angle by using... Problem 45PE: For Exercises 45-50, given the function value, find a cofunction of another angle with the same... Problem 46PE: For Exercises 45-50, given the function value, find a cofunction of another angle with the same... Problem 47PE Problem 48PE: For Exercises 45-50, given the function value, find a cofunction of another angle with the same... Problem 49PE: For Exercises 45-50, given the function value, find a cofunction of another angle with the same... Problem 50PE: For Exercises 45-50, given the function value, find a cofunction of another angle with the same... Problem 51PE: For Exercises 51-54, use a calculator to approximate the function values to 4 decimal places. Be... Problem 52PE: For Exercises 51-54, use a calculator to approximate the function values to 4 decimal places. Be... Problem 53PE: For Exercises 51-54, use a calculator to approximate the function values to 4 decimal places. Be... Problem 54PE: For Exercises 51-54, use a calculator to approximate the function values to 4 decimal places. Be... Problem 55PE: An observer at the top of a 426-ft cliff measures the angle of depression from the top of a cliff to... Problem 56PE: A lamppost casts a shadow of 18ft when the angle of elevation of the Sun is 33.7 . How high is the... Problem 57PE: A 30-ft boat ramp makes a 7 angle with the water. What is the height of the ramp above the water at... Problem 58PE Problem 59PE: The Lookout Mountain Incline Railway, located in Chattanooga, Tennessee, is 4972ft long and runs up... Problem 60PE: A 12-ft ladder learning against a house makes a 64 angle with the ground. Will the ladder reach a... Problem 61PE: According to National Football League (NFL) rules, all crossbars on goalposts must be 10ft from the... Problem 62PE: A zip line is to be built between two towers labeled A and B across a wetland area. To approximate... Problem 63PE: To determine the width of a river from point A to point B , a surveyor walks downriver 50ft along a... Problem 64PE: For Exercises 64-68, use the fundamental trigonometric identities as needed. Given that sinx0.3746 ,... Problem 65PE: For Exercises 64-68, use the fundamental trigonometric identities as needed. Give that cosx0.6691 ,... Problem 66PE: For Exercises 64-68, use the fundamental trigonometric identities as needed. Given thatcos12=2+64 ,... Problem 67PE: For Exercises 64-68, use the fundamental trigonometric identities as needed. Given that tan36=525 ,... Problem 68PE Problem 69PE Problem 70PE: An airplane traveling 400 mph at a cruising altitude of 6.6 mi begins its descent. If the angle of... Problem 71PE: A scientist standing at the top of a mountain 2mi above sea level measures the angle of depression... Problem 72PE Problem 73PE: Find the exact lengths x,y , and z . Problem 74PE: Use the figure to explain why tan=cot90 . Problem 75PE Problem 76PE: An athlete is in a boat at point A, 14mi from the nearest point D on a straight shoreline. She can... Problem 77PE Problem 78PE: In the figure, CD=15,DE=8,tan=43 and sin=35 , Find the lengths of a. AC b. AD c. DB d. BE e. AB Problem 79PE Problem 80PE Problem 81PE: Use a cofunction relationship to show that the product tan1tan2tan3tan87tan88tan89 is equal to 1 . Problem 82PE: For Exercises 82-85, use a calculator to approximate the values of the left- and right-hand sides of... Problem 83PE: For Exercises 82-85, use a calculator to approximate the values of the left- and right-hand sides of... Problem 84PE Problem 85PE: For Exercises 82-85, use a calculator to approximate the values of the left- and right-hand sides of... format_list_bulleted