જો $2 \cos \theta = x + \frac{1}{x}$ હોય,તો $2 \cos 3 \theta = $

  • A
    $x^3 - \frac{1}{x^3}$
  • B
    $\left(x + \frac{1}{x}\right)^3$
  • C
    $x + \frac{1}{x}$
  • D
    $x^3 + \frac{1}{x^3}$

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$\frac{\sin \theta + \sin 2\theta}{1 + \cos \theta + \cos 2\theta} = $

$\cos 20^\circ \cos 40^\circ \cos 80^\circ = $

કિંમત શોધો: $\cos^2 A(3 - 4\cos^2 A)^2 + \sin^2 A(3 - 4\sin^2 A)^2$

જો $A = 580^\circ$ હોય,તો નીચેનામાંથી કયું વિધાન સાચું છે?

જો $\sin 6 \theta = 32 \cos^5 \theta \sin \theta - 32 \cos^3 \theta \sin \theta + 3x$ હોય,તો $x$ ની કિંમત શોધો:

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