1. Tardigrade
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  4. The number of distinct solutions x ∈[0, π] which satisfy the equation 8 cos x cos 4 x cos 5 x=1 is k then (k/2) is equal to

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Q. The number of distinct solutions $x \in[0, \pi]$ which satisfy the equation $8 \cos x \cos 4 x \cos 5 x=1$ is $k$ then $\frac{k}{2}$ is equal to

Trigonometric Functions

Solution:

Correct answer is '5'