Mark the correct alternative in the following: is true if and only if

Question

Philoid · Accepted Answer

First of all we need to check the condition on x

If x = 0 then sec²x attains to infinity, so that condition must be true i.e x should not be zero

Again if x+y =0 then the RHS part becomes infinity so that condition must be true i.e. x+y should not be zero.

∴ Option B is the correct answer.