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Asked by Renee ( PLEASE HELP ME)

Half angles in trig

(square root(1-square root(21)/5)/2)
11 years ago

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Answered by Steve
√(1-√21/5)/2)

This is sin x/2 where cosx = √21/5

the value is
11 years ago
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Half angles in trig

(square root(1-square root(21)/5)/2)

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