$\cos^2 73^\circ + \cos^2 47^\circ + (\cos 73^\circ \cdot \cos 47^\circ)$ નું ચોક્કસ મૂલ્ય શું છે?

  • A
    $1/4$
  • B
    $1/2$
  • C
    $3/4$
  • D
    $1$

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Similar Questions

સાબિત કરો કે: $(\sin 3x + \sin x) \sin x + (\cos 3x - \cos x) \cos x = 0$

જો $\cos \alpha = \frac{l \cos \beta + m}{l + m \cos \beta}$ હોય,તો $\left(\frac{\tan \frac{\alpha}{2}}{\tan \frac{\beta}{2}}\right)^2 = $

જો $\sin 10^{\circ} \sin 50^{\circ} \sin 60^{\circ} \sin 70^{\circ} = m$ અને $\tan 20^{\circ} \tan 40^{\circ} \tan 60^{\circ} \tan 80^{\circ} = n$ હોય,તો $\frac{n}{m}$ ની કિંમત શોધો.

જો $\tan B = \frac{n \sin A \cos A}{1 - n \cos^2 A}$ હોય,તો $\tan(A + B)$ ની કિંમત શોધો.

જો $3 \sin \theta + 4 \cos \theta = 3$ અને $\theta \neq (2n + 1) \frac{\pi}{2}$ હોય,તો $\sin 2 \theta = $

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