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Costhetacos3theta-sinthetasin3theta=0

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asked Jul 7, 2016 in PRECALCULUS by anonymous

1 Answer

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The trigonometric equation is image.

Trigonometric identity: image.

Rewrite the equation and simplify

image

General solution image:

If image, then image, where is an integer.

image

The solutions are image

answered Jul 8, 2016 by Anney Mentor

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