SOLUTION: value of an expression. find the exact value of the expression. cos(sin^-1 4/5)

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Question 1165792: value of an expression. find the exact value of the expression.
cos(sin^-1 4/5)
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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cos(sin^-1 4/5) = sqrt%281-%284%2F5%29%5E2%29 = sqrt%281+-+16%2F25%29 = sqrt%289%2F25%29 = 3%2F5.    ANSWER