જો $\sin 2\theta + \sin 2\phi = 1/2$ અને $\cos 2\theta + \cos 2\phi = 3/2$ હોય,તો $\cos^2(\theta - \phi) = $

  • A
    $3/8$
  • B
    $5/8$
  • C
    $3/4$
  • D
    $5/4$

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Similar Questions

$\tan 20^\circ + 2\tan 50^\circ - \tan 70^\circ$ નું મૂલ્ય કેટલું થાય?

જ્યારે $\theta = 45^{\circ}$ હોય ત્યારે $(\sec \theta + \operatorname{cosec} \theta)$ નું મૂલ્ય કેટલું થાય ($\sqrt{2}$ માં)?

જો $b \sin \alpha = a \sin (\alpha + 2\beta)$ હોય,તો $\frac{a + b}{a - b} = $

જો $180^{\circ} < \theta < 270^{\circ}$ હોય,તો $\sqrt{4 \sin^{4} \theta + \sin^{2} 2\theta} + 4 \cos^{2} \left(\frac{\pi}{4} - \frac{\theta}{2}\right)$ ની કિંમત શોધો.

જો $2\cos\theta + \sin\theta = 1$ હોય,તો $4\cos\theta + 3\sin\theta$ ની કિંમત કેટલી થાય?

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