જો $\sin x + \sin y = \frac{1}{2}$ અને $\cos x + \cos y = 1$ હોય,તો $\tan(x + y) = $

  • A
    $\frac{8}{3}$
  • B
    $-\frac{3}{4}$
  • C
    $-\frac{8}{3}$
  • D
    $\frac{4}{3}$

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જો બે ખૂણાઓ $\alpha, \beta$ એવા હોય કે $0 < \alpha, \beta < \frac{\pi}{4}$,$\sqrt{1+\cos 2 \alpha}=\frac{3}{\sqrt{5}}$ અને $\frac{\sqrt{1-\cos 2 \beta}}{\sqrt{1+\cos 2 \beta}}=\frac{1}{7}$,તો $(2 \alpha+\beta)=$

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ધારો કે $\tan \alpha = \frac{a}{a+1}$ અને $\tan \beta = \frac{1}{2a+1}$,તો $\alpha + \beta$ શું થાય?

જો $\cos (A - B) = \frac{3}{5}$ અને $\tan A \tan B = 2$ હોય,તો

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