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Mathematics, 13.11.2020 18:00 recon12759

Given cos u = - 2/(sqrt(5)) and pi/2 < u < pi, evaluate the following using the double-angle formulas: sin2u=, cos2u=, and tan2u=

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Given cos u = - 2/(sqrt(5)) and pi/2 < u < pi, evaluate the following using the double-angle f...

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