જો $0 < \theta < 90$ અને $\sin \theta = \cos 30$ હોય,તો $2 \tan^2 \theta - 1 = \dots$

  • A
    $5$
  • B
    $4$
  • C
    $3$
  • D
    $0$

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સાબિત કરો કે $\frac{1+\sec \theta-\tan \theta}{1+\sec \theta+\tan \theta}=\frac{1-\sin \theta}{\cos \theta}$

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જો $\tan \theta = \frac{4}{3}$ હોય,તો $\frac{5 \sin \theta + 2 \cos \theta}{3 \sin \theta - \cos \theta} = \ldots \ldots$

સાબિત કરો કે $\sin^{6} \theta + \cos^{6} \theta + 3 \sin^{2} \theta \cos^{2} \theta = 1$.

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

જો $\triangle ABC$ માં $C$ આગળ કાટખૂણો હોય,તો $\cos(A + B)$ ની કિંમત શોધો.

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