$\sin \left( \frac{\pi}{10} \right) \sin \left( \frac{3\pi}{10} \right) = $

  • A
    $1/2$
  • B
    $-1/2$
  • C
    $1/4$
  • D
    $1$

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જો $A, B, C, D$ એ ચક્રીય ચતુષ્કોણના ખૂણાઓ હોય,તો $\cos A + \cos B + \cos C + \cos D = $

પદાવલિ $\frac{\tan A}{1 - \cot A} + \frac{\cot A}{1 - \tan A}$ ને નીચે મુજબ લખી શકાય:

$(m + 2)\sin \theta + (2m - 1)\cos \theta = 2m + 1$ હોય,તો $\tan \theta$ ની કિંમત શોધો:

$\frac{1}{\sin 10^{\circ}}-\frac{\sqrt{3}}{\cos 10^{\circ}}$ ની કિંમત શોધો.

જો $\sin (\theta + \alpha ) = a$ અને $\sin (\theta + \beta ) = b$ હોય,તો $\cos 2(\alpha - \beta ) - 4ab\cos (\alpha - \beta )$ ની કિંમત શોધો.

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