1.

`(dy)/(dx)` का मान ज्ञात कीजिये यदि `(i) x= sqrt(1+t ), y= sqrt(1-t)` `(ii) x=a cos theta ,y= asin theta `

Answer» Correct Answer - ` (i) -sqrt((1+t)/(1-t))" "(ii) -cot theta `
` (i) x=sqrt(1+t)`ltbr gt` rArr (dx)/(dt)=2 (1)/(sqrt(1+t))*(d)/(dt) (1+t) =(1)/(2sqrt(1+t))`
और ` y=sqrt(1-t )" "rArr (dy)/(dx) =(-1)/(2sqrt(1-t))`


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