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Find the exact value of the expression.

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Find the exact value of the expression.

sin 285° . sin 75°

trigonometric-functions
exact-value

asked Jan 27, 2015 in PRECALCULUS by anonymous

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1 Answer

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Step 1:

The trigonometric function is .

Use the product- to- sum formula : .

Use the property : .

The exact value of the expression is .

Solution :

The exact value of the expression is .

answered Jan 27, 2015 by james Pupil

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