In aQ R, ∠ R=π/2. If tan(P/2) and tan(Q/2) are the roots of a x^2+b x+c=0, a ≠ 0, then [2005 AIEE...

In aQ R, ∠ R=π/2. If tan(P/2) and tan(Q/2) are the roots of a x^2+b x+c=0, a ≠ 0, then
[2005 AIEEE]
(a) b=a+c
(b) b=c
(c) c=a+b
(d) a=b+c

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