જો $\sin \theta + \sin \phi = a$ અને $\cos \theta + \cos \phi = b$ હોય,તો $\tan \frac{\theta - \phi}{2}$ ની કિંમત શોધો.

  • A
    $\sqrt{\frac{a^2 + b^2}{4 - a^2 - b^2}}$
  • B
    $\sqrt{\frac{4 - a^2 - b^2}{a^2 + b^2}}$
  • C
    $\sqrt{\frac{a^2 + b^2}{4 + a^2 + b^2}}$
  • D
    $\sqrt{\frac{4 + a^2 + b^2}{a^2 + b^2}}$

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Similar Questions

List-$I$ ની વસ્તુઓને List-$II$ ની વસ્તુઓ સાથે જોડો.
List-$I$List-$II$
$(I)$ $\sin^2 5^{\circ} + \sin^2 10^{\circ} + \sin^2 15^{\circ} + \dots + \sin^2 90^{\circ}$$(A)$ $0$
$(II)$ $\tan^2 5^{\circ} \cdot \tan^2 10^{\circ} \cdot \tan^2 15^{\circ} \dots \tan^2 85^{\circ}$$(B)$ $\frac{19}{2}$
$(III)$ $\cos^2 5^{\circ} + \cos^2 10^{\circ} + \cos^2 15^{\circ} + \dots + \cos^2 180^{\circ}$$(C)$ $18$
$(IV)$ $\cot 5^{\circ} + \cot 10^{\circ} + \cot 15^{\circ} + \dots + \cot 175^{\circ}$$(D)$ $1$
$(E)$ $-1$

$\sin^6 \theta + \cos^6 \theta + 3 \sin^2 \theta \cos^2 \theta = $

જો $A + B = 225^\circ$ હોય,તો $\frac{\cot A}{1 + \cot A} \cdot \frac{\cot B}{1 + \cot B} = $

જો $A$ અને $B$ ધન લઘુકોણ હોય જે $3 \cos^2 A + 2 \cos^2 B = 4$ અને $\frac{3 \sin A}{\sin B} = \frac{2 \cos B}{\cos A}$ નું સમાધાન કરે છે,તો $A + 2B =$ ($^{\circ}$ માં)

$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta)^2} = $

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