यदि $\sec (\theta+\alpha), \sec \theta$ और $\sec (\theta-\alpha)$ समांतर श्रेणी में हैं,तो $\sin ^2 \theta=$

  • A
    $\cos \alpha$
  • B
    $2 \cos \alpha$
  • C
    $-2 \cos \alpha$
  • D
    $-\cos \alpha$

Explore More

Similar Questions

यदि $A = 130^\circ$ और $x = \sin A + \cos A$ है,तो

यदि $2 \sinh^{-1}\left(\frac{a}{\sqrt{1-a^2}}\right)=\log \left(\frac{1+x}{1-x}\right)$ है,तो $x$ का मान ज्ञात कीजिए।

$\cos ^3\left(\frac{\pi}{8}\right) \cos \left(\frac{3 \pi}{8}\right)+\sin ^3\left(\frac{\pi}{8}\right) \sin \left(\frac{3 \pi}{8}\right) = $

यदि $\cot \theta + \tan \theta = 3$ और $1 - \cos^2 \theta - \alpha \cos \theta = 0$ है,तो

$\cos 2(\theta + \phi) - 4\cos (\theta + \phi)\sin \theta \sin \phi + 2\sin^2 \phi = $

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