જો $\frac{\cos 3A + \sin 3A}{\cos A - \sin A} = 1 - K \sin 2A$ હોય,તો $K$ ની કિંમત શોધો.

  • A
    $-2$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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જો $\sin ^{2} \alpha+\sin ^{2} \beta=2$ હોય,તો $\cos \left(\frac{\alpha+\beta}{2}\right)$ ની કિંમત કેટલી થાય?

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જો $x = \operatorname{cosec} \theta - \sin \theta$ અને $y = \sec \theta - \cos \theta$ હોય,તો $x$ અને $y$ વચ્ચેનો સંબંધ શું છે?

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