Answer to Question #123577 in Trigonometry for dangol

Question #123577
prove that
(2cosθ−1)(2cosθ−1)(2cos2θ−1)=2cos4θ+1
1
Expert's answer
2020-06-22T15:41:45-0400

As, we have to prove the given statement,thus it is true for all "\\theta" but clearly, for "\\theta=0,\u03c0\/2" it's not true hence question is wrong.


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