જો $\sin x + \sin^2 x = 1$ હોય,તો $\cos^{12} x + 3\cos^{10} x + 3\cos^8 x + \cos^6 x - 2$ ની કિંમત કેટલી થાય?

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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Similar Questions

સમીકરણ $(\sin x - x)(\cos x - x^2) = 0$ ના વાસ્તવિક ઉકેલોની સંખ્યા કેટલી છે?

જો $\tan x = \frac{b}{a}$ હોય,તો $\sqrt{\frac{a + b}{a - b}} + \sqrt{\frac{a - b}{a + b}} = $

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

જો $\frac{\cos x}{a} = \frac{\cos (x + \theta)}{b} = \frac{\cos (x + 2\theta)}{c} = \frac{\cos (x + 3\theta)}{d}$ હોય,તો $\left( \frac{a + c}{b + d} \right)$ ની કિંમત શોધો:

$\cos 20^{\circ} \cos 40^{\circ} \cos 60^{\circ} \cos 80^{\circ} = $

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