Precalculus: Mathematics for Calculus - 6th Edition
Precalculus: Mathematics for Calculus - 6th Edition
6th Edition
ISBN: 9780840068071
Author: Stewart, James, Redlin, Lothar, Watson, Saleem
Publisher: Cengage Learning
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Chapter 6.1, Problem 21E
To determine

To calculate; the degree measure of angle of the given radian measure.

Expert Solution & Answer
Check Mark

Answer to Problem 21E

Solution: −68.8∘ .

Explanation of Solution

To convert the radians to degree multiply the value by 180∘π .

Hence, −1.2×180∘π=−68.8∘ .

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Chapter 6.1, Problem 20E
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Chapter 6.1, Problem 22E

Chapter 6 Solutions

Precalculus: Mathematics for Calculus - 6th Edition

Ch. 6.1 - (a) The radian measure of an angle is the length...Ch. 6.1 - Prob. 2ECh. 6.1 - Prob. 3ECh. 6.1 - Prob. 4ECh. 6.1 - Prob. 5ECh. 6.1 - Prob. 6ECh. 6.1 - Prob. 7ECh. 6.1 - Prob. 8ECh. 6.1 - Prob. 9ECh. 6.1 - Prob. 10E
Ch. 6.1 - Prob. 11ECh. 6.1 - Prob. 12ECh. 6.1 - Prob. 13ECh. 6.1 - Prob. 14ECh. 6.1 - Prob. 15ECh. 6.1 - Prob. 16ECh. 6.1 - Prob. 17ECh. 6.1 - Prob. 18ECh. 6.1 - Prob. 19ECh. 6.1 - Prob. 20ECh. 6.1 - Prob. 21ECh. 6.1 - Prob. 22ECh. 6.1 - Prob. 23ECh. 6.1 - Prob. 24ECh. 6.1 - Prob. 25ECh. 6.1 - Prob. 26ECh. 6.1 - Prob. 27ECh. 6.1 - Prob. 28ECh. 6.1 - Prob. 29ECh. 6.1 - Prob. 30ECh. 6.1 - Prob. 31ECh. 6.1 - Prob. 32ECh. 6.1 - Prob. 33ECh. 6.1 - Prob. 34ECh. 6.1 - Prob. 35ECh. 6.1 - Prob. 36ECh. 6.1 - Prob. 37ECh. 6.1 - Prob. 38ECh. 6.1 - Prob. 39ECh. 6.1 - Prob. 40ECh. 6.1 - Prob. 41ECh. 6.1 - Prob. 42ECh. 6.1 - Prob. 43ECh. 6.1 - Prob. 44ECh. 6.1 - Prob. 45ECh. 6.1 - Prob. 46ECh. 6.1 - Prob. 47ECh. 6.1 - Prob. 48ECh. 6.1 - Prob. 49ECh. 6.1 - Prob. 50ECh. 6.1 - Prob. 51ECh. 6.1 - Prob. 52ECh. 6.1 - Prob. 53ECh. 6.1 - Prob. 54ECh. 6.1 - Prob. 55ECh. 6.1 - Prob. 56ECh. 6.1 - Prob. 57ECh. 6.1 - Prob. 58ECh. 6.1 - Prob. 59ECh. 6.1 - Prob. 60ECh. 6.1 - Prob. 61ECh. 6.1 - Prob. 62ECh. 6.1 - Prob. 63ECh. 6.1 - Prob. 64ECh. 6.1 - Prob. 65ECh. 6.1 - Prob. 66ECh. 6.1 - Prob. 67ECh. 6.1 - Prob. 68ECh. 6.1 - Travel Distance A cars wheels are 28 in. in...Ch. 6.1 - Wheel Revolutions How many revolutions will a car...Ch. 6.1 - Latitudes Pittsburgh, Pennsylvania, and Miami,...Ch. 6.1 - Prob. 72ECh. 6.1 - Prob. 73ECh. 6.1 - Circumference of the Earth The Greek mathematician...Ch. 6.1 - Prob. 75ECh. 6.1 - Irrigation An irrigation system uses a straight...Ch. 6.1 - Windshield Wipers The top and bottom ends of a...Ch. 6.1 - The Tethered Cow A cow is tethered by a 100-ft...Ch. 6.1 - Fan A ceiling fan with 16-in. blades rotates at 45...Ch. 6.1 - Radial Saw A radial saw has a blade with a 6-in....Ch. 6.1 - Winch A winch of radius 2 ft is used to lift heavy...Ch. 6.1 - Speed of a Car The wheels of a car have radius 11...Ch. 6.1 - Speed at the Equator The earth rotates about its...Ch. 6.1 - Truck Wheels A truck with 48-in.-diameter wheels...Ch. 6.1 - Speed of a Current To measure the speed of a...Ch. 6.1 - Bicycle Wheel The sprockets and chain of a bicycle...Ch. 6.1 - Conical Cup A conical cup is made from a circular...Ch. 6.1 - Conical Cup In this exercise we find the volume of...Ch. 6.1 - Prob. 89ECh. 6.1 - Prob. 90ECh. 6.2 - A right triangle with an angle is shown in the...Ch. 6.2 - The reciprocal identities state that...Ch. 6.2 - Prob. 3ECh. 6.2 - Prob. 4ECh. 6.2 - Prob. 5ECh. 6.2 - Prob. 6ECh. 6.2 - Prob. 7ECh. 6.2 - Prob. 8ECh. 6.2 - Prob. 9ECh. 6.2 - Prob. 10ECh. 6.2 - Prob. 11ECh. 6.2 - Prob. 12ECh. 6.2 - Prob. 13ECh. 6.2 - Prob. 14ECh. 6.2 - Prob. 15ECh. 6.2 - Prob. 16ECh. 6.2 - Prob. 17ECh. 6.2 - Prob. 18ECh. 6.2 - Prob. 19ECh. 6.2 - Prob. 20ECh. 6.2 - Prob. 21ECh. 6.2 - Prob. 22ECh. 6.2 - Prob. 23ECh. 6.2 - Prob. 24ECh. 6.2 - Prob. 25ECh. 6.2 - Prob. 26ECh. 6.2 - Prob. 27ECh. 6.2 - Prob. 28ECh. 6.2 - Prob. 29ECh. 6.2 - Prob. 30ECh. 6.2 - Prob. 31ECh. 6.2 - Prob. 32ECh. 6.2 - Prob. 33ECh. 6.2 - Prob. 34ECh. 6.2 - Prob. 35ECh. 6.2 - Prob. 36ECh. 6.2 - Prob. 37ECh. 6.2 - Prob. 38ECh. 6.2 - Prob. 39ECh. 6.2 - Prob. 40ECh. 6.2 - Prob. 41ECh. 6.2 - Prob. 42ECh. 6.2 - Prob. 43ECh. 6.2 - Prob. 44ECh. 6.2 - Prob. 45ECh. 6.2 - Prob. 46ECh. 6.2 - Height of a Building The angle of elevation to the...Ch. 6.2 - Gateway Arch A plane is flying within sight of the...Ch. 6.2 - Deviation of a Laser Beam A laser beam is to be...Ch. 6.2 - Distance at Sea From the top of a 200-ft...Ch. 6.2 - Leaning Ladder A 20-ft ladder leans against a...Ch. 6.2 - Prob. 52ECh. 6.2 - Elevation of a Kite A man is lying on the beach,...Ch. 6.2 - Determining a Distance A woman standing on a hill...Ch. 6.2 - Height of a Tower A water tower is located 325 ft...Ch. 6.2 - Prob. 56ECh. 6.2 - Determining a Distance If both cars in Exercise 62...Ch. 6.2 - Height of a Balloon A hot-air balloon is floating...Ch. 6.2 - Height of a Mountain To estimate the height of a...Ch. 6.2 - Height of Cloud Cover To measure the height of the...Ch. 6.2 - Distance to the Sun When the moon is exactly half...Ch. 6.2 - Distance to the Moon To find the distance to the...Ch. 6.2 - Prob. 63ECh. 6.2 - Parallax To find the distance to nearby stars, the...Ch. 6.2 - Prob. 65ECh. 6.2 - Prob. 66ECh. 6.3 - If the angle is in standard position and P(x, y)...Ch. 6.3 - The sign of a trigonometric function of depends...Ch. 6.3 - Prob. 3ECh. 6.3 - Prob. 4ECh. 6.3 - Prob. 5ECh. 6.3 - Prob. 6ECh. 6.3 - Prob. 7ECh. 6.3 - Prob. 8ECh. 6.3 - Prob. 9ECh. 6.3 - Prob. 10ECh. 6.3 - Prob. 11ECh. 6.3 - Prob. 12ECh. 6.3 - Prob. 13ECh. 6.3 - Prob. 14ECh. 6.3 - Prob. 15ECh. 6.3 - Prob. 16ECh. 6.3 - Prob. 17ECh. 6.3 - Prob. 18ECh. 6.3 - Prob. 19ECh. 6.3 - Prob. 20ECh. 6.3 - Prob. 21ECh. 6.3 - Prob. 22ECh. 6.3 - Prob. 23ECh. 6.3 - Prob. 24ECh. 6.3 - Prob. 25ECh. 6.3 - Prob. 26ECh. 6.3 - Prob. 27ECh. 6.3 - Prob. 28ECh. 6.3 - Prob. 29ECh. 6.3 - Prob. 30ECh. 6.3 - Prob. 31ECh. 6.3 - Prob. 32ECh. 6.3 - Prob. 33ECh. 6.3 - Prob. 34ECh. 6.3 - Prob. 35ECh. 6.3 - Prob. 36ECh. 6.3 - Prob. 37ECh. 6.3 - Prob. 38ECh. 6.3 - Prob. 39ECh. 6.3 - Prob. 40ECh. 6.3 - Prob. 41ECh. 6.3 - Prob. 42ECh. 6.3 - Prob. 43ECh. 6.3 - Prob. 44ECh. 6.3 - Prob. 45ECh. 6.3 - Prob. 46ECh. 6.3 - Prob. 47ECh. 6.3 - Prob. 48ECh. 6.3 - Prob. 49ECh. 6.3 - Prob. 50ECh. 6.3 - Prob. 51ECh. 6.3 - Prob. 52ECh. 6.3 - Prob. 53ECh. 6.3 - Prob. 54ECh. 6.3 - Prob. 55ECh. 6.3 - Prob. 56ECh. 6.3 - Prob. 57ECh. 6.3 - Prob. 58ECh. 6.3 - Prob. 59ECh. 6.3 - Prob. 60ECh. 6.3 - Prob. 61ECh. 6.3 - Prob. 62ECh. 6.3 - Height of a Rocket A rocket fired straight up is...Ch. 6.3 - Rain Gutter A rain gutter is to be constructed...Ch. 6.3 - Wooden Beam A rectangular beam is to be cut from a...Ch. 6.3 - Prob. 66ECh. 6.3 - Throwing a Shot Put The range R and height H of a...Ch. 6.3 - Sledding The time in seconds that it takes for a...Ch. 6.3 - Beehives In a beehive each cell is a regular...Ch. 6.3 - Turning a Comer A steel pipe is being carried down...Ch. 6.3 - Rainbows Rainbows are created when sunlight of...Ch. 6.3 - Prob. 72ECh. 6.3 - Prob. 73ECh. 6.4 - Prob. 1ECh. 6.4 - In the triangle shown we can find the angle as...Ch. 6.4 - Prob. 3ECh. 6.4 - Prob. 4ECh. 6.4 - Prob. 5ECh. 6.4 - Prob. 6ECh. 6.4 - Prob. 7ECh. 6.4 - Prob. 8ECh. 6.4 - Prob. 9ECh. 6.4 - Prob. 10ECh. 6.4 - Prob. 11ECh. 6.4 - Prob. 12ECh. 6.4 - Prob. 13ECh. 6.4 - Prob. 14ECh. 6.4 - Prob. 15ECh. 6.4 - Prob. 16ECh. 6.4 - Prob. 17ECh. 6.4 - Prob. 18ECh. 6.4 - Prob. 19ECh. 6.4 - Prob. 20ECh. 6.4 - Prob. 21ECh. 6.4 - Prob. 22ECh. 6.4 - Prob. 23ECh. 6.4 - Prob. 24ECh. 6.4 - Prob. 25ECh. 6.4 - Prob. 26ECh. 6.4 - Prob. 27ECh. 6.4 - Prob. 28ECh. 6.4 - Prob. 29ECh. 6.4 - Prob. 30ECh. 6.4 - Prob. 31ECh. 6.4 - Prob. 32ECh. 6.4 - Prob. 33ECh. 6.4 - Prob. 34ECh. 6.4 - Prob. 35ECh. 6.4 - Prob. 36ECh. 6.4 - Leaning Ladder A 20-ft ladder is leaning against a...Ch. 6.4 - Prob. 38ECh. 6.4 - Height of the Space Shuttle An observer views the...Ch. 6.4 - Height of a Pole A 50-ft pole casts a shadow as...Ch. 6.4 - Height of a Balloon A 680-ft rope anchors a...Ch. 6.4 - View from a Satellite The figures on the next page...Ch. 6.4 - Surfing the Perfect Wave For a wave to be...Ch. 6.4 - Prob. 44ECh. 6.5 - In triangle ABC with sides a, b, and c the Law of...Ch. 6.5 - Prob. 2ECh. 6.5 - Prob. 3ECh. 6.5 - Prob. 4ECh. 6.5 - Prob. 5ECh. 6.5 - Prob. 6ECh. 6.5 - Prob. 7ECh. 6.5 - Prob. 8ECh. 6.5 - Prob. 9ECh. 6.5 - Prob. 10ECh. 6.5 - Prob. 11ECh. 6.5 - Prob. 12ECh. 6.5 - Prob. 13ECh. 6.5 - Prob. 14ECh. 6.5 - Prob. 15ECh. 6.5 - Prob. 16ECh. 6.5 - Prob. 17ECh. 6.5 - Prob. 18ECh. 6.5 - Prob. 19ECh. 6.5 - Prob. 20ECh. 6.5 - Prob. 21ECh. 6.5 - Prob. 22ECh. 6.5 - Prob. 23ECh. 6.5 - Prob. 24ECh. 6.5 - Prob. 25ECh. 6.5 - Prob. 26ECh. 6.5 - Prob. 27ECh. 6.5 - Prob. 28ECh. 6.5 - Prob. 29ECh. 6.5 - Prob. 30ECh. 6.5 - Prob. 31ECh. 6.5 - Prob. 32ECh. 6.5 - Tracking a Satellite The path of a satellite...Ch. 6.5 - Flight of a Plane A pilot is flying over a...Ch. 6.5 - Prob. 35ECh. 6.5 - Distance Across a Lake Points A and B are...Ch. 6.5 - The Leaning Tower of Pisa The bell lower of the...Ch. 6.5 - Radio Antenna A short-wave radio antenna is...Ch. 6.5 - Height of a Tree A tree on a hillside casts a...Ch. 6.5 - Length of a Guy Wire A communications tower is...Ch. 6.5 - Calculating a Distance Observers at P and Q are...Ch. 6.5 - Calculating an Angle A water tower 30 m tall is...Ch. 6.5 - Distances to Venus The elongation of a planet is...Ch. 6.5 - Soap Bubbles When two bubbles cling together in...Ch. 6.5 - Prob. 45ECh. 6.6 - For triangle ABC with sides a, b, and c the Law of...Ch. 6.6 - In which of the following cases must the Law of...Ch. 6.6 - Prob. 3ECh. 6.6 - Prob. 4ECh. 6.6 - Prob. 5ECh. 6.6 - Prob. 6ECh. 6.6 - Prob. 7ECh. 6.6 - Prob. 8ECh. 6.6 - Prob. 9ECh. 6.6 - Prob. 10ECh. 6.6 - Prob. 11ECh. 6.6 - Prob. 12ECh. 6.6 - Prob. 13ECh. 6.6 - Prob. 14ECh. 6.6 - Prob. 15ECh. 6.6 - Prob. 16ECh. 6.6 - Prob. 17ECh. 6.6 - Prob. 18ECh. 6.6 - Prob. 19ECh. 6.6 - Prob. 20ECh. 6.6 - Prob. 21ECh. 6.6 - Prob. 22ECh. 6.6 - Prob. 23ECh. 6.6 - Prob. 24ECh. 6.6 - Prob. 25ECh. 6.6 - Prob. 26ECh. 6.6 - Prob. 27ECh. 6.6 - Prob. 28ECh. 6.6 - Prob. 29ECh. 6.6 - Prob. 30ECh. 6.6 - Prob. 31ECh. 6.6 - Prob. 32ECh. 6.6 - Prob. 33ECh. 6.6 - Prob. 34ECh. 6.6 - Prob. 35ECh. 6.6 - Prob. 36ECh. 6.6 - Prob. 37ECh. 6.6 - Prob. 38ECh. 6.6 - Surveying To find the distance across a small...Ch. 6.6 - Geometry A parallelogram has sides of lengths 3...Ch. 6.6 - Calculating Distance Two straight roads diverge at...Ch. 6.6 - Calculating Distance A car travels along a...Ch. 6.6 - Dead Reckoning A pilot flies in a straight path...Ch. 6.6 - Navigation Two boats leave the same port at the...Ch. 6.6 - Prob. 45ECh. 6.6 - Navigation Airport B is 300 mi from airport A at a...Ch. 6.6 - Triangular Field A triangular field has sides of...Ch. 6.6 - Towing a Barge Two tugboats that are 120 ft apart...Ch. 6.6 - Flying Kites A boy is flying two kites at the same...Ch. 6.6 - Securing a Tower A 125-ft tower is located on the...Ch. 6.6 - Cable Car A steep mountain is inclined 74 to the...Ch. 6.6 - CN Tower The CN Tower in Toronto, Canada, is the...Ch. 6.6 - Land Value Land in downtown Columbia is valued at...Ch. 6.6 - Prob. 54ECh. 6 - Prob. 1RCCCh. 6 - Prob. 2RCCCh. 6 - Prob. 3RCCCh. 6 - Prob. 4RCCCh. 6 - Prob. 5RCCCh. 6 - Prob. 6RCCCh. 6 - Prob. 7RCCCh. 6 - Prob. 8RCCCh. 6 - Prob. 9RCCCh. 6 - Prob. 10RCCCh. 6 - Prob. 11RCCCh. 6 - Prob. 12RCCCh. 6 - Prob. 13RCCCh. 6 - Prob. 14RCCCh. 6 - Prob. 15RCCCh. 6 - Prob. 1RECh. 6 - Prob. 2RECh. 6 - Prob. 3RECh. 6 - Prob. 4RECh. 6 - Prob. 5RECh. 6 - Prob. 6RECh. 6 - Prob. 7RECh. 6 - Prob. 8RECh. 6 - Prob. 9RECh. 6 - Prob. 10RECh. 6 - Prob. 11RECh. 6 - Prob. 12RECh. 6 - Prob. 13RECh. 6 - Prob. 14RECh. 6 - Prob. 15RECh. 6 - Prob. 16RECh. 6 - Prob. 17RECh. 6 - Prob. 18RECh. 6 - Prob. 19RECh. 6 - Prob. 20RECh. 6 - Prob. 21RECh. 6 - Prob. 22RECh. 6 - Prob. 23RECh. 6 - Prob. 24RECh. 6 - Prob. 25RECh. 6 - Prob. 26RECh. 6 - Prob. 27RECh. 6 - Prob. 28RECh. 6 - Prob. 29RECh. 6 - Prob. 30RECh. 6 - Prob. 31RECh. 6 - Prob. 32RECh. 6 - Prob. 33RECh. 6 - Prob. 34RECh. 6 - Prob. 35RECh. 6 - Prob. 36RECh. 6 - Prob. 37RECh. 6 - Prob. 38RECh. 6 - Prob. 39RECh. 6 - Prob. 40RECh. 6 - Prob. 41RECh. 6 - Prob. 42RECh. 6 - Prob. 43RECh. 6 - Prob. 44RECh. 6 - Prob. 45RECh. 6 - Prob. 46RECh. 6 - Prob. 47RECh. 6 - Prob. 48RECh. 6 - Prob. 49RECh. 6 - Prob. 50RECh. 6 - Prob. 51RECh. 6 - Prob. 52RECh. 6 - Prob. 53RECh. 6 - Prob. 54RECh. 6 - Prob. 55RECh. 6 - Prob. 56RECh. 6 - Prob. 57RECh. 6 - Prob. 58RECh. 6 - Prob. 59RECh. 6 - Prob. 60RECh. 6 - Prob. 61RECh. 6 - Prob. 62RECh. 6 - Prob. 63RECh. 6 - Prob. 64RECh. 6 - Prob. 65RECh. 6 - Prob. 66RECh. 6 - Prob. 67RECh. 6 - Prob. 68RECh. 6 - Prob. 69RECh. 6 - Prob. 70RECh. 6 - Prob. 71RECh. 6 - Prob. 72RECh. 6 - Prob. 73RECh. 6 - Prob. 74RECh. 6 - Prob. 75RECh. 6 - Prob. 76RECh. 6 - Prob. 77RECh. 6 - Prob. 78RECh. 6 - Prob. 79RECh. 6 - Prob. 80RECh. 6 - Prob. 81RECh. 6 - Prob. 82RECh. 6 - Find the radian measures that correspond to the...Ch. 6 - Prob. 2TCh. 6 - Prob. 3TCh. 6 - Find the exact value of each of the following. (a)...Ch. 6 - Find tan + sin for the angle shown.Ch. 6 - Express the lengths a and b shown in the figure in...Ch. 6 - If cos=13 and is in Quadrant III, find tan cot ...Ch. 6 - Prob. 8TCh. 6 - Express tan in terms of sec for in Quadrant II.Ch. 6 - The base of the ladder in the figure is 6 ft from...Ch. 6 - Express in each figure in terms of x. (a) (b)Ch. 6 - Find the exact value of cos(tan1910).Ch. 6 - Prob. 13TCh. 6 - Find the side labeled x or the angle labeled . 14.Ch. 6 - Find the side labeled x or the angle labeled . 15.Ch. 6 - Prob. 16TCh. 6 - Prob. 17TCh. 6 - Prob. 18TCh. 6 - Refer to the figure below. (a) Find the area of...Ch. 6 - Refer to the figure below. (a) Find the angle...Ch. 6 - Two wires tether a balloon to the ground, as...Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Determining a Distance A surveyor on one side of a...Ch. 6 - Height of a Cliff To measure the height of an...Ch. 6 - Height of a Mountain To calculate the height h of...Ch. 6 - Determining a Distance A surveyor has determined...Ch. 6 - Surveying Building Lots A surveyor surveys two...Ch. 6 - Prob. 8P
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