Mathematics, 22.06.2019 14:30 fggfg33
A. if cosθ=−45 where θ is in quadrant 3, find sin2θ. b. if cosθ=2√2 where θ is in quadrant 1, find cos2θ. c. if sinθ=817 where θ is in quadrant 2, find tan2θ.
Answers: 2
---> remember that the sine is negative (3 quadrant)
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A. if cosθ=−45 where θ is in quadrant 3, find sin2θ. b. if cosθ=2√2 where θ is in quadrant 1, find c...
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