$\cos \frac{\pi}{7} \cos \frac{2\pi}{7} \cos \frac{3\pi}{7} =$

  • A
    $-\frac{1}{8}$
  • B
    $\frac{1}{16}$
  • C
    $\frac{1}{8}$
  • D
    $\text{કોઈ નહીં}$

Explore More

Similar Questions

જો $\tan \alpha = \frac{1}{7}$ અને $\sin \beta = \frac{1}{\sqrt{10}}$ જ્યાં $0 < \alpha, \beta < \frac{\pi}{2}$ હોય,તો $2\beta$ ની કિંમત શોધો.

$\sqrt{2+\sqrt{2+2 \cos 4 \theta}} = $

જો $\cos x = -\frac{1}{3}$ અને $x$ એ $III$ ચરણમાં હોય,તો $\sin \frac{x}{2}, \cos \frac{x}{2}$ અને $\tan \frac{x}{2}$ શોધો.

Difficult
View Solution

$\frac{\sec 8\theta - 1}{\sec 4\theta - 1}$ ની કિંમત શું થાય?

સાબિત કરો કે: $\cos 6x = 32 \cos^6 x - 48 \cos^4 x + 18 \cos^2 x - 1$

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