2. %3D 8. Assume that cos(r) = 15 for r in quadrant IV. Find sin(2.r), cos(2r), and tan(2r).

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A: To find the angle between 0 and 2π in radians that is coterminal with -4π7.

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A: See below the answer and explanation

Q: A(6,45), B(-2, 프), C(4,-240"), D(-2,-π)

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