જો $\cos ^{-1} x - \cos ^{-1} \frac{y}{3} = \alpha$,જ્યાં $-1 \leq x \leq 1$,$-3 \leq y \leq 3$,અને $x \leq \frac{y}{3}$ હોય,તો તમામ $x, y$ માટે $9x^2 - 6xy \cos \alpha + y^2$ ની કિંમત શું થાય?

  • A
    $9 \sin ^2 \alpha$
  • B
    $3 \sin ^2 \alpha$
  • C
    $9 \cos ^2 \alpha$
  • D
    $6 \sin ^2 \alpha$

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Similar Questions

જો $\sin^{-1} \frac{1}{3} + \sin^{-1} \frac{2}{3} = \sin^{-1} x$ હોય,તો $x$ ની કિંમત શોધો.

જો $\pi \le x \le 2\pi $ હોય,તો ${\cos ^{ - 1}}(\cos x)$ કોના બરાબર થાય?

જો $\cot ^{-1}(\sqrt{\cos \alpha})-\tan ^{-1}(\sqrt{\cos \alpha})=x$ હોય,તો $\sin x$ ની કિંમત શોધો.

$\sin ^{-1} \frac{\sqrt{3}}{2} + \sin ^{-1} \sqrt{\frac{2}{3}} = $

$\tan \left( \tan^{-1} \frac{1}{2} - \tan^{-1} \frac{1}{3} \right)$ નું મૂલ્ય શું છે?

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