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Find all solutions

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Costhetacos3theta-sinthetasin3theta=0

find all solutions

trigonometric-equations

asked Jul 7, 2016 in PRECALCULUS by anonymous

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1 Answer

0 votes

The trigonometric equation is .

Trigonometric identity: .

Rewrite the equation and simplify

General solution :

If , then , where is an integer.

The solutions are

answered Jul 8, 2016 by Anney Mentor

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