यदि $\sin \alpha = \frac{-3}{5}$ जहाँ $\pi < \alpha < \frac{3\pi}{2}$ है,तो $\cos \frac{\alpha}{2} = $

  • A
    $\frac{-1}{\sqrt{10}}$
  • B
    $\frac{1}{\sqrt{10}}$
  • C
    $\frac{3}{\sqrt{10}}$
  • D
    $\frac{-3}{\sqrt{10}}$

Explore More

Similar Questions

$\cos 15^\circ = $

$\frac{1}{\tan 3A - \tan A} - \frac{1}{\cot 3A - \cot A} = $

$\tan \frac{\pi}{8}$ का मान ज्ञात कीजिए।

यदि $\tan x = \frac{3}{4}$ और $\pi < x < \frac{3\pi}{2}$ है,तो $\cos \frac{x}{2}$ का मान ज्ञात कीजिए।

यदि $\sin x + \cos x = \frac{1}{5}$ है,तो $\tan 2x$ का मान ज्ञात कीजिए।

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