Exercise 14. Find the expressions for sin A, cos A and tan A.

Exercise 68. Reference angle: 180-150 = 30⁰ 1 sin2 cot3 23 sec3 Exercise 74. Find the exact values of the six trigonometric functions for 420⁰

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Exercise 112. Section 5.4 Exercise 16. Angle x + Angle y = 90⁰ Angle x = 47.8⁰ Angle y = 90-47.8 = 42.2⁰ XY = 89.6cm

Verify with Pythagorean Theorem: Exercise 40. RT = 53.1m Angle T = 3210’ ≈ 32. 167⁰⁰ Angle S = 5750’ ≈ 57.833⁰⁰ Verify with Pythagorean Theorem: Exercise 42. Included angle = 32’ ≈ 0.533⁰ d = 92,919,800 mi Let the diameter of the Sun be S. The distance from Earth to one end of the Sun’ 864402.422 mi Verify with Pythagorean Theorem:

Exercise 80. Take both expressions and solve for x: Section 6.1 Exercise 5. r=4=/2 arc length = 4 x (/2) = 2≈6.283 Exercise 8. A = (1/2)r2 = s/r = 15/10= 3/2 A = ½(10)2(3/2) =75 Exercise 48. Exercise 60. 0.1194 x 180/= 5373 Exercise 76.

Exercise 90. a.)Find the number of rotations of a tire in 1 hour if the car is driven at 55mph. b.)Suppose that oversize tires of radius 16 in. are placed on the car. If the car is now driven for 1 hour with the speedometer reading 55mph, how far has the car gone? If the speed limit is 55mph, does Terry deserve a speeding ticket?

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Section 6.2 Exercise 44. Exercise 66. sin s= 0.8959

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