Q. 145.0( 1 Vote )

Mark the correct alternative in the following:

is true if and only if

A.

B.

C. x = y

D.

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.

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