Find 
when x and y are connected by the relation given
sec (x + y) = xy
We have,
sec(x + y) = xy
By the rules given below:
Chain Rule
f(x) = g(h(x))
f’(x) = g’(h(x))h’(x)
Product rule:
On differentiating both sides with respect to x, we get
55
Find when x and y are connected by the relation given
sec (x + y) = xy
We have,
sec(x + y) = xy
By the rules given below:
Chain Rule
f(x) = g(h(x))
f’(x) = g’(h(x))h’(x)
Product rule:
On differentiating both sides with respect to x, we get