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If tanx = 3/4 what is cos2x?

 Oct 4, 2020
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If tan(x) = 3/4 what is cos(2x)?

 

tan(x) = 3/4       ∠x = 36.87º

 

cos(2x) = cos(2 * 36.87) = 0.28

 Oct 5, 2020

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