`(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

` (i) -sqrt((1+t)/(1-t))" "(ii) -cot theta `

Explanation

` (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))`