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find the exact value of sin u/2 given cos u = 12/13, where 0<u<pi/2

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asked Apr 1, 2016 in PRECALCULUS by anonymous

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1 Answer

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The trigonometric equation is .

Half angle trigonometric identity: .

Substitute in the trigonometric identity.

The value of trigonometric equation is .

answered Apr 1, 2016 by Anney Mentor

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