Question

The value of sin 20${}^{\circ }$ sin 40${}^{\circ }$ sin 60${}^{\circ }$ sin 80${}^{\circ }$ is equal to

• A. $\frac{3}{16}$
• B. $\frac{5}{16}$
• C. $-\frac{3}{16}$
• D. $-\frac{5}{16}$

Answer 1

Answer: (A)

Correct answer is (a) $\frac{3}{16}$