Teaching Jharkhand (JSSC) TGT (6 to 8) Mock Test 2023-24 Mathematics Trigonometry Trigonometric Functions
The value of \(\rm \cos \frac{\pi}{5}\ cos \ \frac{2\pi}{5} \ cos \ \frac{4\pi}{5} \ cos \ \frac{8\pi}{5}\) is
1
\(\frac{1}{16}\)
2
0
3
\(\frac{-1}{8}\)
4
\(\frac{-1}{16}\)