If `x=e^tsint,y=e^tcost` then `(d^2y)/(dx^2)` at `x=pi` is

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sir, in the question it is given at x=pi then why did you put t=pi? pls answer..
edit:also it was dt/dx so it should be 1/et(sint +cost)

subhashnemade
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Great vedio, it's help me lot to solve my sum...

SourovMojumdar-sojs
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How could u diff dy/dx wrt t when it was asked in ques wrt x

inderpreetkaur