1.

Sometimes we are just concerned with finding integral solutions to equations. Consider the equation tan^(-1).(1)/m+tan^(-1).(1)/n=tan^(-1).(1)/lambda, where m,n, lambda in N If lambda is such that lambda^2=1 is a prime, then how many solutions (m,n) are there for the equation?

Answer»

ONE
TWO
Four
Infinite

ANSWER :B


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