$\cos ^3 \theta + \cos ^3(120^{\circ} + \theta) + \cos ^3(\theta - 120^{\circ}) = $

  • A
    $\frac{\sqrt{3}}{2} \cos \theta$
  • B
    $\frac{3}{4} \sec ^3 \theta$
  • C
    $\frac{3}{2} \tan ^3 \theta$
  • D
    $\frac{3}{4} \cos 3 \theta$

Explore More

Similar Questions

यदि $\frac{5\pi}{2} < x < 3\pi$ है,तो व्यंजक $\frac{\sqrt{1 - \sin x} + \sqrt{1 + \sin x}}{\sqrt{1 - \sin x} - \sqrt{1 + \sin x}}$ का मान क्या है?

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

Difficult
View Solution

यदि $\cosh x = \frac{5}{4}$ है,तो $\tanh 3x =$ क्या होगा?

$\cos 15^{\circ} \cos 7.5^{\circ} \sin 7.5^{\circ}$ का मान क्या है?

यदि $\cos ^3 x \sin 4 x = \sum_{r=0}^{n} a_{r} \sin rx$ सभी $x \in R$ के लिए है,तो $a_3+a_5 : a_1+a_7 = $

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