જો $\sin \theta = \sin 15^{\circ} + \sin 45^{\circ}$,જ્યાં $0^{\circ} < \theta < 180^{\circ}$ હોય,તો $\theta =$ ($^{\circ}$ માં)

  • A
    $75$
  • B
    $150$
  • C
    $45$
  • D
    $60$

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

$\frac{\cos 17^\circ + \sin 17^\circ}{\cos 17^\circ - \sin 17^\circ} = $

$1 - 2{\sin ^2}\left( {\frac{\pi }{4} + \theta } \right) = $

$2 \cosh (x+y) \sinh (x-y) + \sinh 2y =$

જો $\sin \alpha = 1/\sqrt{5}$ અને $\sin \beta = 3/5$ હોય,તો $\beta - \alpha$ કયા અંતરાલમાં આવે છે?

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