Give an example of an angle which is coterminal with 690 degree. Answer: ______

Question

Give an example of an angle which is coterminal with 690 degree. Answer: ______ Convert the angle 11 pi/15 radian measure into degree measure. Answer: ________ Find the exact values (no decimal approximations). sec 570 degree Answer: ________ tan (-30 degree) Answer: _________ Given y = 4 sin(6x - pi), state the period Answer: ______ phase shift Answer: _______ Solve the trigonometric equation (sin x)(2sin x - 1) = 0 = 0 in the interval [0, 360 degree). Find the exact values. Answer: ___________ Find the exact value of arcos (tan 3 pi/4) Answer: __________ Find the exact value of arcsin (sin 2 pi/3) Answer:______

Explanation / Answer

9 (a) 690 = 720-30

Hence coterninal angle is -30 degrees

(b) = 180°

Hence 11/15 = 11*180/15 = 11* 12 = 132°

10 (a) sec 570° = sec (540°+30°) = - sec 30° = -2/3

(b) tan (-30°) = - tan 30° = -1/3

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