જો $A+B+C=180^{\circ}$ હોય,તો $\tan \left(\frac{A+B}{2}\right)=$ ...........

  • A
    $\cot \left(\frac{A+B}{2}\right)$
  • B
    $\cot \frac{C}{2}$
  • C
    $\sec \frac{C}{2}$
  • D
    $\sin \frac{A}{2}$

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જો $3 \theta$ એ લઘુકોણનું માપ હોય અને $\sin 3 \theta = \cos (\theta - 26^{\circ})$ હોય,તો $\theta$ ની કિંમત $\ldots \ldots \ldots \ldots$ છે. ($^{\circ}$ માં)

જો $\tan 7 \theta \cdot \tan 3 \theta = 1$ હોય,તો $\theta$ ની કિંમત .......... છે.

$9 \sec^{2} A - 9 \tan^{2} A = \dots$

જો $\tan A = \cot B$ હોય,તો $A + B = \ldots$

સાબિત કરો કે,$(\sin \alpha+\cos \alpha)(\tan \alpha+\cot \alpha)=\sec \alpha+\operatorname{cosec} \alpha$

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