यदि $y = \cos^{-1} \left\{ \frac{a \cos x - b \sin x}{\sqrt{a^2 + b^2}} \right\}$ है,तो $\frac{d^2 y}{d x^2}$ का मान ज्ञात कीजिए।

  • A
    $a - b$
  • B
    $a + b$
  • C
    $1$
  • D
    $0$

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यदि $y = \sqrt{\sin x + \sqrt{\sin x + \sqrt{\sin x + \dots \infty}}}$ है,तो बिंदु $(\pi, 1)$ पर $\frac{d^2 y}{d x^2}$ का मान ज्ञात कीजिए।

यदि $y = \cos^{2} \frac{3x}{2} - \sin^{2} \frac{3x}{2}$ है,तो $\frac{d^{2}y}{dx^{2}}$ क्या है?

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