જો $\sin x + \cos x = a$,જ્યાં $a \in [-\sqrt{2}, \sqrt{2}] - \{-1, 1\}$,હોય તો $\sum_{n=1}^{\infty} (\sin^n x + \cos^n x)$ ની કિંમત શોધો.

  • A
    $\frac{2(1 + a - a^2)}{(a + 1)^2}$
  • B
    $\frac{2(a^2 - a + 1)}{(a - 1)^2}$
  • C
    $\frac{2(a^2 - a + 1)}{(a + 1)^2}$
  • D
    $\frac{2(1 + a - a^2)}{(a - 1)^2}$

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જો $2y \cos \theta = x \sin \theta$ અને $2x \sec \theta - y \csc \theta = 3$ હોય,તો $x^2 + 4y^2 = $

$0 < x \leq \pi$ માટે, $\sinh ^{-1}(\cot x)$ ની કિંમત શું થાય?

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:

જો $A = \frac{\sin 3^\circ}{\cos 9^\circ} + \frac{\sin 9^\circ}{\cos 27^\circ} + \frac{\sin 27^\circ}{\cos 81^\circ}$ અને $B = \tan 81^\circ - \tan 3^\circ$ હોય, તો $\frac{B}{A}$ ની કિંમત . . . . . . થાય.

જો $\cos ^2 84^{\circ}+\sin ^2 126^{\circ}-\sin 84^{\circ} \cos 126^{\circ}=K$ અને $\cot A+\tan A=2 K$ હોય,તો $\tan A$ ની શક્ય કિંમતો શોધો.

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