$36(4 \cos^2 9^{\circ}-1)(4 \cos^2 27^{\circ}-1)(4 \cos^2 81^{\circ}-1)(4 \cos^2 243^{\circ}-1)$ ની કિંમત શોધો.

  • A
    $54$
  • B
    $18$
  • C
    $27$
  • D
    $36$

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Similar Questions

$\tan \frac{\pi}{5}+2 \tan \frac{2 \pi}{5}+4 \cot \frac{4 \pi}{5}$ ની કિંમત શોધો.

$\tan 81^{\circ}-\tan 63^{\circ}-\tan 27^{\circ}+\tan 9^{\circ}$ ની કિંમત શોધો.

જો $\sin \theta + \sin^2 \theta = 1$ અને $\cos^{12} \theta + a \cos^{10} \theta + b \cos^8 \theta + c \cos^6 \theta + d = 0$ હોય,તો:

$n > 2$ માટે તમામ શક્ય પૂર્ણાંક કિંમતોની સંખ્યા શોધો જેથી $\sin \frac{\pi}{2n} + \cos \frac{\pi}{2n} = \frac{\sqrt{n}}{2}$ થાય.

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

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