જો $f(x) = \frac{\cot x}{1 + \cot x}$ અને $\alpha + \beta = \frac{5 \pi}{4}$ હોય,તો $f(\alpha) f(\beta)$ ની કિંમત શોધો.

  • A
    $\frac{3}{2}$
  • B
    $\frac{-3}{2}$
  • C
    $\frac{-1}{2}$
  • D
    $\frac{1}{2}$

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ધારો કે $S = \{x \in \left(-\frac{\pi}{2}, \frac{\pi}{2}\right) : 9^{1-\tan^2 x} + 9^{\tan^2 x} = 10\}$ અને $\beta = \sum_{x \in S} \tan^2\left(\frac{x}{3}\right)$,તો $\frac{1}{6}(\beta - 14)^2$ ની કિંમત શોધો.

જો $A+B+C+D=2 \pi$ હોય,તો $\sin A+\sin B+\sin C+\sin D=$

જો $f_n(x) = \frac{1}{2n} [\sin^{2n} x + \cos^{2n} x]$ હોય,તો $f_1(x) + f_2(x) - f_3(x) =$

જો $\cos x + \cos y = \frac{2}{3}$ અને $\sin x - \sin y = \frac{3}{4}$ હોય,તો $\sin(x - y) + \cos(x - y)$ ની કિંમત શોધો.

$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta)^2} = $

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