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In a Delta PQR,angleR=pi/2. If tan(P/2) ...

In a `Delta PQR,angleR=pi/2`. If tan`(P/2)` and tan `(Q/2)` are the roots of `ax^2+bx+c=0,a ne 0`, then

A

b=a+c

B

b=c

C

c=a+b

D

a=b+c

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The correct Answer is:
C
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