$\cos(36^{\circ}-A) \cos(36^{\circ}+A) + \cos(54^{\circ}+A) \cos(54^{\circ}-A) = $

  • A
    $\cos(2A)$
  • B
    $\cos(A)$
  • C
    $\sin(2A)$
  • D
    $\sin(A)$

Explore More

Similar Questions

यदि $x + y = \frac{\pi}{4}$ है, तो $(1 + \tan x)(1 + \tan y) =$ का मान क्या होगा?

$\triangle ABC$ में,यदि $A = \tan^{-1} 2$ और $B = \tan^{-1} 3$ है,तो $C = $ . . . . . . ($^{\circ}$ में)

$\tan 15^\circ = $

$\cos \alpha \sin (\beta-\gamma) + \cos \beta \sin (\gamma-\alpha) + \cos \gamma \sin (\alpha-\beta)$ का मान क्या है?

यदि $A+B=\frac{\pi}{4}$,तो $\frac{\cos B-\sin B}{\cos B+\sin B}=$

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