0 votes 0 votes If a,b,c are the roots of equations $x^3$ + p$x^ 2$ +q$x$+p=0, Then the value of $$tan^{-1} a+ tan^{-1 }b+tan^{-1}c$$ is a) n π /4 b) n π /2 c) n π d) 2n π Linear Algebra isro-ece engineering-mathematics + – sh!va asked Mar 3, 2017 • edited Mar 9, 2019 by Naveen Kumar 3 sh!va 786 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 4 votes 4 votes From the given equation we get, a+b+c= -p and ab+bc+ca = q and abc= -p then Rahul Jain25 answered Mar 3, 2017 • selected Mar 5, 2017 by Rahul Jain25 Rahul Jain25 comment Share Follow See all 0 reply Please log in or register to add a comment.