How do you evaluate $cos(arcsin(5/13))$ ?

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How do you evaluate $cos(arcsin(5/13))$ ?

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Answer 1 · 2015-05-25T17:53:16

One of the standard right angled triangles has sides : 5, 12, 13
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By basic trig definitions
$cos(arcsin(5/13)) = 12/13$ or $-12/13$

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How do you evaluate $cos(arcsin(5/13))$ ?

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