$\frac{1-\cos 2 \theta+\sin 2 \theta}{1+\cos 2 \theta+\sin 2 \theta}=$

  • A
    $\cot \theta$
  • B
    $\cos 2 \theta$
  • C
    $\tan \theta$
  • D
    $\tan 2 \theta$

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$\cos x \cdot \cos 7 x - \cos 5 x \cdot \cos 13 x = $

નીચેનામાંથી કઈ નિત્યસમ સાચી છે?

જો $\sec x = \frac{25}{24}$ અને $x$ પ્રથમ ચરણમાં હોય,તો $\sin \frac{x}{2} + \cos \frac{x}{2} =$

જો $\cot \frac{2x}{3} + \tan \frac{x}{3} = \operatorname{cosec} \frac{kx}{3}$ હોય, તો $k$ ની કિંમત શોધો.

જો $\tan \alpha = \frac{1}{7}$ અને $\tan \beta = \frac{1}{3}$ હોય,તો $\cos 2\alpha = $

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