Trigonometric EquationHard

Question

Value of $\frac{4 \sin 9^{o} \sin 21^{o} \sin 39^{o} \sin 51^{o} \sin 69^{o} \sin 81^{o}}{\sin 54^{o}}$ is equal to

Options

A.

$\frac{1}{16}$

B.

$\frac{1}{32}$

C.

$\frac{1}{8}$

D.

$\frac{1}{4}$

Solution

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