જો $x = \cos 10^\circ \cos 20^\circ \cos 40^\circ$ હોય,તો $x$ નું મૂલ્ય શું થાય?

  • A
    $\frac{1}{4}\tan 10^\circ $
  • B
    $\frac{1}{8}\cot 10^\circ $
  • C
    $\frac{1}{8}\csc 10^\circ $
  • D
    $\frac{1}{8}\sec 10^\circ $

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$\sec ^{2} \theta - \frac{\sin ^{2} \theta - 2 \sin ^{4} \theta}{2 \cos ^{4} \theta - \cos ^{2} \theta}$ ની કિંમત શોધો.

જો $\alpha, \beta, \gamma \in \left( 0, \frac{\pi}{2} \right)$ હોય,તો $\frac{\sin(\alpha + \beta + \gamma)}{\sin \alpha + \sin \beta + \sin \gamma}$ શું થાય?

જો $\sin \alpha = 1/\sqrt{5}$ અને $\sin \beta = 3/5$ હોય,તો $\beta - \alpha$ કયા અંતરાલમાં આવે છે?

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જો $A + B + C = 180^o$ હોય,તો $(\cot B + \cot C)(\cot C + \cot A)(\cot A + \cot B)$ ની કિંમત શું થાય?

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