Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
The value of expression cos 60° cos 36° cos 42° cos 78° is:
1
\(\dfrac{1}{8}\)
2
\(\dfrac{\sqrt{3}}{8}\)
3
\(\dfrac{1}{16}\)
4
\(\dfrac{1}{4}\)