The 2nd derivative of \[a{{\sin }^{3}}t\] with respect to \[a{{\cos }^{3}}t\,\,\text{at}\,\,t=\frac{\pi }{4}\] is [Kerala (Engg.) 2002]

The 2nd derivative of \[a{{\sin }^{3}}t\] with respect to \[a{{\cos }^

1.	The 2nd derivative of \[a{{\sin }^{3}}t\] with respect to \[a{{\cos }^{3}}t\,\,\text{at}\,\,t=\frac{\pi }{4}\] is [Kerala (Engg.) 2002]
A.	\[\frac{4\sqrt{2}}{3a}\]
B.	2
C.	\[\frac{1}{12a}\]
D.	None of these
Answer» B. 2

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The 2nd derivative of \[a{{\sin }^{3}}t\] with respect to \[a{{\cos }^{3}}t\,\,\text{at}\,\,t=\frac{\pi }{4}\] is [Kerala (Engg.) 2002]

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