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OpenStudy (onthecly2):
I need help with a few Trig problems! Any help would be amazing! 1. Provide an exact evaluation of the expression: tan (-285°). 2. Use trigonometric expressions to build an equivalent trigonometric identity with the given expression: cos (x) − cos^3 (x) = ? 3. Find the exact value of cos(2θ) for the trigonometric expression given where θ is located in the stated quadrant: sin(θ) = -4/5 and θ is in Quadrant IV.
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