Question 681796: cos(sin−1 (3/8)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! cos(sin−1 (3/8)
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you want the cos of the angle whose sin = 3/8
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If the sin is 3/8 , y = 3 and r = 8
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Solve for "x"
x^2 = r^2-y^2 = 64-9
x = sqrt(55)
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Then cos(sin^-1(3/8)) = x/r = sqrt(55)/8
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Cheers,
Stan H.
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