SOLUTION: exact value of cos2x given that sinx = (sqrt of 3)/4

SOLUTION: exact value of cos2x given that sinx = (sqrt of 3)/4

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Question 809251: exact value of cos2x given that sinx = (sqrt of 3)/4
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
exact value of cos2x given that sinx = (sqrt of 3)/4

cos(2x)=1-2sin^2(x)=1-2*3/16=1-3/8=5/8
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