# Calculus

posted by
**NGOFAKA**
.

Pls help solve this problem

if sqrt(y)=(arctan)tan-1(x), show that (1+x^2)dy/dx((1+x^2)dy/dx)=2

posted by
**NGOFAKA**
.

Pls help solve this problem

if sqrt(y)=(arctan)tan-1(x), show that (1+x^2)dy/dx((1+x^2)dy/dx)=2