1.

If `y=sinx` and `x=3t` then `(dy)/(dt)` will beA. `3cos(x)`B. `cosx`C. `-3cos(x)`D. `-cosx`

Answer» Correct Answer - A
`y=sinx`,`x=3t`
`(dy)/(dx)=cosx`,`(dx)/(dt)=3`
`(dy)/(dt)=(dy)/(dx)xx(dx)/(dt)=3cosx=3cos(3t)`


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