1.

A curve is represented paramtrically by the equations `x=e^(t)cost` and `y=e^(t)sint` where `t` is a parameter. Then The value of `(d^(2)y)/(dx^(2))` at the point where `t=0` isA. `1`B. `-2`C. `2`D. `3`

Answer» Correct Answer - C
`(d^(2)y)/(dx^(2))=(sec^(3)((pi)/4+t))/(e^(1)(cost-sint))`
`(d^(2)y)/(dx^(2)):|_(t=0)=2`


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