यदि $\sin (\theta + \alpha ) = a$ और $\sin (\theta + \beta ) = b$ है,तो $\cos 2(\alpha - \beta ) - 4ab\cos (\alpha - \beta )$ का मान ज्ञात कीजिए।

  • A
    $1 - a^2 - b^2$
  • B
    $1 - 2a^2 - 2b^2$
  • C
    $2 + a^2 + b^2$
  • D
    $2 - a^2 - b^2$

Explore More

Similar Questions

यदि $A = \sin^2 x + \cos^4 x$ है,तो सभी वास्तविक $x$ के लिए :

Difficult
View Solution

यदि $A = \sin 45^{\circ} + \cos 45^{\circ}$ और $B = \sin 44^{\circ} + \cos 44^{\circ}$ है,तो

$\frac{\cos ^{2} 45^{\circ}}{\sin ^{2} 60^{\circ}}+\frac{\cos ^{2} 60^{\circ}}{\sin ^{2} 45^{\circ}}-\frac{\tan ^{2} 30^{\circ}}{\cot ^{2} 45^{\circ}}-\frac{\sin ^{2} 30^{\circ}}{\cot ^{2} 30^{\circ}}$ का संख्यात्मक मान है

$0 < \phi < \frac{\pi}{2}$ के लिए,यदि $x = \sum_{n=0}^\infty \cos^{2n}\phi$,$y = \sum_{n=0}^\infty \sin^{2n}\phi$,और $z = \sum_{n=0}^\infty \cos^{2n}\phi \sin^{2n}\phi$ है,तो:

Difficult
View Solution

यदि $\sec \theta(\cos \theta+\sin \theta)=\sqrt{2}$ है,तो $\frac{2 \sin \theta}{\cos \theta-\sin \theta}$ का मान क्या है?

Difficult
View Solution

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