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use a double-angle formula to rewrite the expression.

0 votes

4 - 8 sin ^2 x

asked Jan 22, 2015 in TRIGONOMETRY by anonymous

1 Answer

0 votes

Step 1 :

The expression is image.

Common out image from the expression.

image

Double-angle formula : image.

image.

The expression image can be written as image.

Solution :

The expression image can be written as image.

answered Jan 22, 2015 by lilly Expert

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