If 2 ${cos}^{2} x$ $cos^2x$ - $cos x$ $cosx$ = 1 , what is the value of $x$ $x$ ?

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Answer 1 · 2016-04-02T04:33:59

$x = 0$ $x=0$

As we know:

$cos 0 = 1$ $cos 0 =1$

Put $x = 0$ $x=0$ in equation:

$2 {cos}^{2} 0 - cos 0 = 1$ $2cos^(2)0-cos0=1$

$2 \cdot 1 - 1 = 1$ $2*1-1=1$

$1 = 1$ $1=1$

$L . H . S = R . H . S$ $L.H.S=R.H.S$

If 2cos^2xcos2xcos^2x - cosxcosxcosx = 1 , what is the value of xxx?