જો $\tan A - \tan B = x$ અને $\cot A - \cot B = y$ હોય,તો $\cot (A - B) =$

  • A
    $\frac{xy}{x+y}$
  • B
    $\frac{xy}{x-y}$
  • C
    $\frac{x-y}{xy}$
  • D
    $\frac{y-x}{xy}$

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જો $\cos(\theta - \alpha) = a$ અને $\sin(\theta - \beta) = b$ હોય, તો $\cos^2(\alpha - \beta) + 2ab \sin(\alpha - \beta) + \cos^2(\theta - \alpha)$ ની કિંમત શું થાય?

$\tan 9^{\circ}-\tan 27^{\circ}-\tan 63^{\circ}+\tan 81^{\circ}=$

$\sin \frac{\pi}{14} \sin \frac{3\pi}{14} \sin \frac{5\pi}{14} \sin \frac{7\pi}{14} \sin \frac{9\pi}{14} \sin \frac{11\pi}{14} \sin \frac{13\pi}{14}$ નું મૂલ્ય કેટલું થાય?

જો $\tan {3^o} + 2\tan {6^o} + 4\tan {12^o} + 8\cot {24^o} = \cot {\theta ^o}$ હોય,તો:

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)

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