જો $A + B + C = 180^\circ$ હોય,તો $\sum \tan \frac{A}{2} \tan \frac{B}{2} = $

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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જો $\alpha + \beta = \frac{\pi}{2}$ અને $\beta + \gamma = \alpha$ હોય,તો $\tan \alpha$ ની કિંમત શું થાય?

જો $\tan \theta = \frac{x \sin \phi}{1 - x \cos \phi}$ અને $\tan \phi = \frac{y \sin \theta}{1 - y \cos \theta}$ હોય,તો $\frac{x}{y} = $

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$\sin 50^\circ - \sin 70^\circ + \sin 10^\circ = $

જો $(\sin \alpha + \operatorname{cosec} \alpha)^{2} + (\cos \alpha + \sec \alpha)^{2} = K + \tan^{2} \alpha + \cot^{2} \alpha$ હોય,તો $K$ ની કિંમત શોધો.

ધારો કે $\alpha, \beta$ એવા છે કે જેથી $\pi < (\alpha - \beta) < 3\pi$ થાય. જો $\sin \alpha + \sin \beta = -\frac{21}{65}$ અને $\cos \alpha + \cos \beta = -\frac{27}{65}$ હોય,તો $\cos \frac{\alpha - \beta}{2}$ ની કિંમત શોધો.

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