$\cos ^2(x)+\cos ^2\left(x+\frac{\pi}{3}\right)+\cos ^2\left(x-\frac{\pi}{3}\right) = $

  • A
    $\frac{3}{2}$
  • B
    $\frac{1}{2}$
  • C
    $\frac{-3}{2}$
  • D
    $\frac{-1}{2}$

Explore More

Similar Questions

यदि $a \cos \theta + b \sin \theta = m$ और $a \sin \theta - b \cos \theta = n$ है,तो ${a^2} + {b^2} = $

$0 \leq x \leq \pi$ के लिए,यदि $81^{\sin ^2 x}+81^{\cos ^2 x}=30$ है,तो $x=$

यदि $\frac{1}{6} \sin \theta, \cos \theta$ और $\tan \theta$ गुणोत्तर श्रेणी में हैं,तो $\theta$ का हल समुच्चय क्या है?

यदि $\sin \theta + \cos \theta = p$ और $\sin^3 \theta + \cos^3 \theta = q$ है,तो $p(p^2 - 3)$ का मान ज्ञात कीजिए।

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

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