જો $\alpha$ બીજા ચરણમાં હોય,તો $\sqrt{\frac{1-\sin \alpha}{1+\sin \alpha}}-\sqrt{\frac{1+\sin \alpha}{1-\sin \alpha}}=$

  • A
    $2 \tan \alpha$
  • B
    $-2 \tan \alpha$
  • C
    $2 \cot \alpha$
  • D
    $-2 \cot \alpha$

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જો $\sin (\alpha - \beta ) = \frac{1}{2}$ અને $\cos (\alpha + \beta ) = \frac{1}{2}$ હોય,જ્યાં $\alpha$ અને $\beta$ ધન લઘુકોણ છે,તો

જો $A + B + C = 180^o$ હોય,તો $\cot \frac{A}{2} + \cot \frac{B}{2} + \cot \frac{C}{2}$ નું મૂલ્ય કેટલું થાય?

જો $\tan \alpha = n \tan \beta$ અને $\sin \alpha = m \sin \beta$ હોય,તો $\frac{m^{2}-1}{n^{2}-1} =$

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