1.

If \(z = {e^x}\sin y,x = {\log _e}t,y = {t^2}\) then \(\frac{{dz}}{{dt}}\) is given by the expression-

A. \(\frac{{{e^x}}}{t}(\sin y - 2{t^2}\cos y)\)
B. \(\frac{{{e^x}}}{t}\left( {\sin y + 2{t^2}\cos y} \right)\)
C. \(\frac{{{e^x}}}{t}\left( {\cos y + 2{t^2}\sin y} \right)\)
D. \(\frac{{{e^x}}}{t}\left( {\cos y - 2{t^2}\sin y} \right)\)
Answer» C. \(\frac{{{e^x}}}{t}\left( {\cos y + 2{t^2}\sin y} \right)\)


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