यदि $\cos x+\cos y=p$ और $\sin x+\sin y=q$ है,तो $\cos \left(\frac{x-y}{2}\right) = $

  • A
    $\pm \frac{\sqrt{p^2+q^2}}{2}$
  • B
    $\pm \frac{pq}{2}$
  • C
    $\pm \frac{p+q}{2}$
  • D
    $\pm \frac{\sqrt{p^2+q^2}}{4}$

Explore More

Similar Questions

$\mathbb{R}$ पर $4 \cos \left(x^2\right) \cos \left(\frac{\pi}{3}+x^2\right) \cos \left(\frac{\pi}{3}-x^2\right)$ के चरम मान क्या हैं?

यदि $3 \cos \theta + 4 \sin \theta = 5$ है,तो $3 \sin \theta - 4 \cos \theta$ का मान ज्ञात कीजिए।

यदि $0 < \theta < \frac{\pi}{2}$ और $\sin \theta \cos \theta = \frac{12}{25}$ है,तो $\sin^4 \theta + \cos^4 \theta$ का मान ज्ञात कीजिए।

$\cos 6^{\circ} \sin 24^{\circ} \cos 72^{\circ} = $

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

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