જો $A + C = B$ હોય,તો $\tan A \tan B \tan C = $

  • A
    $\tan A \tan B + \tan C$
  • B
    $\tan B - \tan C - \tan A$
  • C
    $\tan A + \tan C - \tan B$
  • D
    $ - (\tan A \tan B + \tan C)$

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જો $\cot \alpha = 1$ અને $\sec \beta = -\frac{5}{3}$,જ્યાં $\pi < \alpha < \frac{3\pi}{2}$ અને $\frac{\pi}{2} < \beta < \pi$ હોય,તો $\tan(\alpha + \beta)$ ની કિંમત અને $\alpha + \beta$ કયા ચરણમાં આવે છે તે અનુક્રમે જણાવો.

$\frac{\sin A+\sin 7 A+\sin 13 A}{\cos A+\cos 7 A+\cos 13 A} =$

$\cos \left(\frac{3 \pi}{4}+x\right)-\sin \left(\frac{\pi}{4}-x\right) = $

જો $\sin A + \sin B = C$ અને $\cos A + \cos B = D$ હોય,તો $\sin (A + B)$ ની કિંમત શોધો.

જો $\frac{x}{\cos \theta} = \frac{y}{\cos \left( \theta - \frac{2\pi}{3} \right)} = \frac{z}{\cos \left( \theta + \frac{2\pi}{3} \right)},$ હોય,તો $x + y + z = $

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