state gov UP Lekhpal Mock Test 2023 - 24 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
यदि sin \(\theta \) = \(\frac{1}{2}\) है, तब cos 2\(\theta \) का मान कितना है?
1
\(\frac{1}{2}\)
2
\(\frac{1}{4}\)
3
\(\frac{1}{6}\)
4
\(\frac{1}{8}\)