જો $\cos A + \cos B = \cos C$ અને $\sin A + \sin B = \sin C$ હોય,તો પદાવલિ $\frac{\sin(A + B)}{\sin 2C}$ નું મૂલ્ય શું થાય?

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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Similar Questions

જો $\frac{\cos (\theta_1+\theta_2)}{\cos (\theta_1-\theta_2)}+\frac{\cos (\theta_3-\theta_4)}{\cos (\theta_3+\theta_4)}=0$ હોય,તો $\cot \theta_1 \cdot \cot \theta_2 \cdot \cot \theta_3 \cdot \cot \theta_4=$

જો $x$ અને $y$ લઘુકોણ હોય કે જેથી $\cos x + \cos y = \frac{3}{2}$ અને $\sin x + \sin y = \frac{3}{4}$ થાય,તો $\sin(x + y)$ ની કિંમત શોધો.

$\sin ^4 \frac{\pi}{8}+\sin ^4 \frac{2 \pi}{8}+\sin ^4 \frac{3 \pi}{8}+\sin ^4 \frac{4 \pi}{8}+\sin ^4 \frac{5 \pi}{8}+\sin ^4 \frac{6 \pi}{8}+\sin ^4 \frac{7 \pi}{8} = ?$

$\cos ^2 10^{\circ}-\cos 10^{\circ} \cdot \cos 50^{\circ}+\cos ^2 50^{\circ}$ નું મૂલ્ય શોધો.

જો $2y \cos \theta = x \sin \theta$ અને $2x \sec \theta - y \csc \theta = 3$ હોય,તો $x^2 + 4y^2 = $

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