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If cot(x) = a than cos(2x) is?

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If cot(x) = a than cos(2x) is?

angles

asked Jun 10, 2014 in TRIGONOMETRY by anonymous

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1 Answer

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The trigonometric function value of .

Square each side.

Apply power reducing formula : .

.

The value of .

answered Jun 10, 2014 by casacop Expert

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