SOLUTION: Given that x is an acute angle such that COSx=3/5 . Find SIN3x .

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Question 519428: Given that x is an acute angle such that COSx=3/5 .
Find SIN3x .
Answer by lwsshak3(11628) About Me  (Show Source):
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Given that x is an acute angle such that COSx=3/5 .
Find SIN3x
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cosx=3/5
x=arccos(3/5)=53.13º
3x=159.39
sin 3x=sin 159.39º=0.35