જો $\sin 70^{\circ} = \cos \theta$ હોય,તો $\theta = \ldots \ldots \ldots \ldots$ ($^{\circ}$ માં)

  • A
    $70$
  • B
    $90$
  • C
    $20$
  • D
    $30$

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જો $\sin \theta + \sin^2 \theta = 1$ હોય,તો $\cos^2 \theta + \cos^4 \theta = \dots$

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જો $\cos 9 \alpha = \sin \alpha$ અને $9 \alpha < 90^{\circ}$ હોય,તો $\tan 5 \alpha$ ની કિંમત શોધો.

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અમુક $\theta$ (જ્યાં,$0 < \theta < 90^{\circ}$) માટે નીચેનામાંથી શું સાચું છે?

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