જો $\cos (\alpha - \beta ) = 1$ અને $\cos (\alpha + \beta ) = \frac{1}{e}$,જ્યાં $-\pi < \alpha, \beta < \pi$ હોય,તો $(\alpha, \beta)$ ની ક્રમયુક્ત જોડીઓની કુલ સંખ્યા કેટલી થાય?

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $4$

Explore More

Similar Questions

$(\cos \alpha + \cos \beta )^2 + (\sin \alpha + \sin \beta )^2 = $

જો $\sec \theta - \tan \theta = \frac{1}{\sqrt{3}}$ હોય,તો $\sec \theta \cdot \tan \theta$ ની કિંમત શોધો.

$\log \tan 1^{\circ} + \log \tan 2^{\circ} + \log \tan 3^{\circ} + \ldots + \log \tan 89^{\circ}$ નું મૂલ્ય કેટલું થાય?

$(\sec A + \tan A - 1)(\sec A - \tan A + 1) - 2\tan A = $

$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta )^2} = $

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