જો $\sin (\theta + \alpha ) = a$ અને $\sin (\theta + \beta ) = b$ હોય,તો $\cos 2(\alpha - \beta ) - 4ab\cos (\alpha - \beta )$ ની કિંમત શોધો.

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

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Similar Questions

જો $\sqrt{2} \tan 2 \theta = \sqrt{6}$ અને $0^{\circ} < \theta < 45^{\circ}$ હોય,તો $\sin \theta + \sqrt{3} \cos \theta - 2 \tan^{2} \theta$ ની કિંમત શોધો.

જો $\sec \theta + \tan \theta = 2 + \sqrt{5}$ હોય,તો $\sin \theta$ ની કિંમત શોધો.

$\frac{\sin^2 A - \sin^2 B}{\sin A \cos A - \sin B \cos B} = $

$\sin^{2} \theta + \cos^{2} \theta + \sec^{2} \theta + \operatorname{cosec}^{2} \theta + \tan^{2} \theta + \cot^{2} \theta$ નું ન્યૂનતમ મૂલ્ય શું છે?

$(\sec 2A + 1){\sec ^2}A = $

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