cos 6x = 1

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A: NOTE: Refresh your page if you can't see any equations. . for the general solution add

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A: Topic: trigonometry

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Q: find the exact value of (a) and (b). Do not use calculator. (a) sin(-150°) (b) cos(270°)

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Q: photo is attached

A: Given:

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Q: Find all solutions in radians using exact values only.       cos24x = 1

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Q: see atta chment

A: Equation can be rewritten as

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A: We have, 2cos2x + cosx − 1 = 0 Let Cosx = y 2y2 + y − 1 = 0 Using quadratic formula,

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A: given equation cos (5t) =0.8 taking cos inverse both side →  cos-1 cos (5t) = cos-1 (0.8) →  5t    =…