$\cos ^2 10^{\circ}-\cos 10^{\circ} \cdot \cos 50^{\circ}+\cos ^2 50^{\circ}$ का मान ज्ञात कीजिए।

  • A
    $\frac{3}{2}+\cos 20^{\circ}$
  • B
    $\frac{3}{4}(1+\cos 20^{\circ})$
  • C
    $\frac{3}{4}$
  • D
    $\frac{1}{2}$

Explore More

Similar Questions

यदि $\sin \theta + \sin 2\theta + \sin 3\theta = \sin \alpha$ और $\cos \theta + \cos 2\theta + \cos 3\theta = \cos \alpha$ है,तो $\theta$ का मान ज्ञात कीजिए।

यदि $a \tan \alpha + b \tan \beta = (a + b) \tan \left( \frac{\alpha + \beta}{2} \right)$ और $\alpha - \beta \neq 2n\pi$ है,तो $\frac{\cos \beta}{\cos \alpha} = $

फलन $f(x) = \cos x \cos(x + 2) - \cos^2(x + 1)$ का आलेख है

$\operatorname{coth}^2 x - \tanh^2 x =$

$\tan 9^{\circ}-\tan 27^{\circ}-\tan 63^{\circ}+\tan 81^{\circ}=$

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