Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the value of for x < 0.
Given tan-1 x + tan-1 (1/x) for x < 0
We know that if x<0, y<0
= -π + tan-1 (∞)
= -π + π/2
= -π/2
∴ tan-1 x + tan-1 (1/x) = -π/2