જો $A = 30^{\circ}$ હોય,તો $\cos 2A$ ની કિંમત $\ldots \ldots \ldots$ થાય.

  • A
    $1$
  • B
    $0$
  • C
    $\frac{1}{2}$
  • D
    $\frac{\sqrt{3}}{2}$

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જો $\sin \alpha = \frac{1}{2}$ અને $\cos \beta = \frac{1}{2}$ હોય,તો $(\alpha + \beta)$ નું મૂલ્ય શું થાય ($^{\circ}$ માં)?

સાબિત કરો કે,
$\frac{\sin \theta}{1+\cos \theta}+\frac{1+\cos \theta}{\sin \theta}=2 \operatorname{cosec} \theta$

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

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જો $\cos \theta = \frac{1}{\sqrt{2}}$ હોય,તો $\theta = \ldots$ ($^\circ$ માં)

$\frac{\sin 60^{\circ} + \cos 30^{\circ}}{1 + \sin 30^{\circ} + \cos 60^{\circ}} = \dots$

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