જો $\sin 2\theta + \sin 2\phi = \frac{1}{2}$ અને $\cos 2\theta + \cos 2\phi = \frac{3}{2}$ હોય,તો $\cos^2(\theta - \phi) =$

  • A
    $\frac{3}{8}$
  • B
    $\frac{5}{8}$
  • C
    $\frac{3}{4}$
  • D
    $\frac{5}{4}$

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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.

$\cos ^2 76^{\circ}+\cos ^2 16^{\circ}-\cos 76^{\circ} \cos 16^{\circ}$ ની કિંમત શોધો.

જો $\operatorname{Sinh}^{-1} x = \operatorname{Cosh}^{-1} y = \log(1+\sqrt{2})$ હોય, તો $\operatorname{Tan}^{-1}(x+y) = $

જો $\sin x + \sin^{2} x = 1$ હોય,તો $\cos^{8} x + 2 \cos^{6} x + \cos^{4} x$ ની કિંમત શોધો.

જો $\operatorname{sech}^{-1} x = \log 2$ અને $\operatorname{cosech}^{-1} y = -\log 3$ હોય, તો $(x + y) = $

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