Q. 124.3( 40 Votes )

If y = cos–1 x, Find d2y/dx2 in terms of y alone.

Answer :

It is given that y = cos–1 x

Now,



Therefore,





………………………(1)


Now it is given that y = cos–1 x


x= cosy


Now putting the value of x in equation (1), we get






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