જો $\cos (\alpha + \beta) = \frac{3}{5}$,$\sin (\alpha - \beta) = \frac{5}{13}$ અને $0 < \alpha, \beta < \frac{\pi}{4}$ હોય,તો $\tan (2\alpha)$ ની કિંમત શોધો.

  • A
    $\frac{63}{52}$
  • B
    $\frac{33}{52}$
  • C
    $\frac{63}{16}$
  • D
    $\frac{21}{16}$

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સાબિત કરો કે $\frac{\cos 9x - \cos 5x}{\sin 17x - \sin 3x} = -\frac{\sin 2x}{\cos 10x}$

જો $\cot \alpha = \frac{1}{2}$ અને $\sec \beta = -\frac{5}{3}$,જ્યાં $\alpha \in \left(\pi, \frac{3\pi}{2}\right)$ અને $\beta \in \left(\frac{\pi}{2}, \pi\right)$ હોય,તો $\tan(\alpha + \beta)$ ની કિંમત શોધો.

$\cos ^4 \frac{\pi}{24} - \sin ^4 \frac{\pi}{24} = $

જો $\theta+\phi=\frac{\pi}{4}$ હોય, તો $(1+\tan \theta)(1+\tan \phi)$ ની કિંમત કેટલી થાય?

$\frac{\tan 52^{\circ} - \tan 38^{\circ}}{\tan 14^{\circ}} = $

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