Q. The value of the expression $\frac{1 - 4 s i n 1 0 ^{\circ} s i n 7 0 ^{\circ}}{2 s i n 1 0 ^{\circ}}$ is

92 118 Trigonometric Functions Report Error

A

1

45%

B

2

8%

C

$3$

25%

D

$\frac{3}{2}$

21%

Solution:

Correct answer is (a) 1