sin(π-x) = .75 find cos(-x)

Please help solve the problem! I have a test on it and I dont know how to solve it!
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1 Answer

sin(π-x)=sin(x)=0.75. cos(-x)=cos(x)=√(1-0.75²)=√0.4375=0.6614 approx. or √7/4.

by Top Rated User (1.2m points)

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