यदि $x + \frac{1}{x} = 2\cos \theta ,$ है,तो ${x^3} + \frac{1}{{{x^3}}} = $

  • A
    $\cos 3\theta $
  • B
    $2\cos 3\theta $
  • C
    $\frac{1}{2}\cos 3\theta $
  • D
    $\frac{1}{3}\cos 3\theta $

Explore More

Similar Questions

$\cos 41^{\circ} \cdot \cos 42^{\circ} \cdot \cos 43^{\circ} \cdot \cos 44^{\circ} \cdot \cos 45^{\circ} \cdot \cos 46^{\circ} \cdot \cos 47^{\circ} \cdot \cos 48^{\circ} \cdot \cos 49^{\circ}$ का मान क्या है?

$\tan \frac{2\pi}{5} - \tan \frac{\pi}{15} - \sqrt{3} \tan \frac{2\pi}{5} \tan \frac{\pi}{15}$ का मान ज्ञात कीजिए।

यदि $\tan^2 \alpha \tan^2 \beta + \tan^2 \beta \tan^2 \gamma + \tan^2 \gamma \tan^2 \alpha + 2 \tan^2 \alpha \tan^2 \beta \tan^2 \gamma = 1$ है,तो $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma$ का मान क्या है?

Difficult
View Solution

$\sec {50^o} + \tan {50^o}$ का मान क्या है?

यदि $\cos(\alpha + \beta) = \frac{3}{5}$,$\sin(\alpha - \beta) = \frac{5}{13}$ और $0 < \alpha, \beta < \frac{\pi}{4}$ है,तो $\tan(2\alpha)$ का मान ज्ञात कीजिए।

Difficult
View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo