The number of values \( x \) lying in the interval \( \left(\frac{\pi}{9}, \frac{4 \pi}{9}\right.... VIDEO
The number of values \( x \) lying in the interval \( \left(\frac{\pi}{9}, \frac{4 \pi}{9}\right) \)
\( \mathrm{P} \)
satisfying the equation
W.
\( 1+\cos 10 x \cos 6 x=2 \cos ^{2} 8 x+\sin ^{2} 8 x \) is equal to
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