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find the exact value of the expression.

0 votes

find the exact value of the expression.

trigonometric-functions

asked Jan 21, 2015 in TRIGONOMETRY by anonymous

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1 Answer

0 votes

Step 1:

The expression is .

Using sum and difference formula.

.

The expression can be written as

Using cofunction identity .

Solution:

answered Jan 21, 2015 by Sammi Mentor
edited Jan 21, 2015 by Sammi

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