Find 
when x and y are connected by the relation given
tan-1 (x2 + y2) = a
We have,
tan-1(x2 + y2) = a
∴ x2 + y2 = tan a
On differentiating both sides with respect to x, we get
56
Find when x and y are connected by the relation given
tan-1 (x2 + y2) = a
We have,
tan-1(x2 + y2) = a
∴ x2 + y2 = tan a
On differentiating both sides with respect to x, we get