જો $a \sin^2 x + b \cos^2 x = c$,$b \sin^2 y + a \cos^2 y = d$ અને $a \tan x = b \tan y$ હોય,તો $\frac{a^2}{b^2}$ ની કિંમત શોધો.

  • A
    $\frac{(b - c)(d - b)}{(a - d)(c - a)}$
  • B
    $\frac{(a - d)(c - a)}{(b - c)(d - b)}$
  • C
    $\frac{(d - a)(c - a)}{(b - c)(d - b)}$
  • D
    $\frac{(b - c)(b - d)}{(a - c)(a - d)}$

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જો $\sin 21^{\circ} = \frac{x}{y}$ હોય,તો $\sec 21^{\circ} - \sin 69^{\circ}$ ની કિંમત શોધો.

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$\sin (\beta + \gamma - \alpha ) + \sin (\gamma + \alpha - \beta ) + \sin (\alpha + \beta - \gamma ) - \sin (\alpha + \beta + \gamma ) = $

જો બે ખૂણાઓનો સરવાળો અને તફાવત અનુક્રમે $\pi$ અને $\frac{\pi}{12}$ હોય,તો અંશ માપમાં ખૂણાઓના મૂલ્યો ( $^{\circ}$ માં) શોધો.

જો $\sin A + \cos A = \sqrt{2}$ હોય,તો $\cos^2 A = $

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