Use the given information to find the exact value of each of the following a sin 20 b cos 20 c tan 20 cot 0 15, 0 lies in quadrant II a sin 20- (Simplity your answer Type an exact answer, using radicals as noeded Use integers or fractions for any numbers in the expression. Rationalze all denominators) b. cos 20 (Simplity your answer Type an exact answer, using radicals as needed Useo integers or fractions for any numbers in the expression Ralionalize all denominators) e tan 20 (Smplidy your answer Type an exact answer, uning radicals as needed. Use integers or fractons for any numbers in the expression Rationalize all denominators)

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A: Trigonometry

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A: Given,

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A: We have to find the value of sin-7π12. We see that, 7π12=π-5π12

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.