જો $3 \sin \alpha = 5 \sin \beta$ હોય,તો $\tan \left(\frac{\alpha + \beta}{2}\right) \div \tan \left(\frac{\alpha - \beta}{2}\right) = $

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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$ABC$ એક એવો ત્રિકોણ છે કે જેથી $\sin(2A + B) = \sin(C - A) = -\sin(B + 2C) = \frac{1}{2}$ થાય. જો $A, B,$ અને $C$ એ $A.P.$ માં હોય,તો $A, B,$ અને $C$ શું છે?

જો $\tan \theta = \frac{x \sin \phi}{1 - x \cos \phi}$ અને $\tan \phi = \frac{y \sin \theta}{1 - y \cos \theta}$ હોય,તો $\frac{x}{y} = $

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

$\tan 81^{\circ} - \tan 63^{\circ} - \tan 27^{\circ} + \tan 9^{\circ}$ નું મૂલ્ય શોધો.

જો $\frac{\cos (A+B)}{\cos (A-B)}=\frac{\sin (C+D)}{\sin (C-D)}$ હોય,તો $\tan A \tan B \tan C=$

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