1.

If \[x=\sin t\] and \[y=\sin pt\], then the value of\[\left( 1-{{x}^{2}} \right)\frac{{{d}^{2}}y}{d{{x}^{2}}}-x\frac{dy}{dx}+{{p}^{2}}y\]is equal to [Pb. CET 2002]

A. 0
B. 1
C. -1
D. \[\sqrt{2}\]
Answer» B. 1


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