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Q.

If A+B+C=720 then TanA+TanB+TanC=

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a

CotA CotB CotC

b

TanA TanB TanC

c

Tan2A Tan2B T2anC

d

Tan2A + Tan2B + Tan2B

answer is A.

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Detailed Solution

A+B+C=720 tan(A+B+C)=0 tan A+tan B+tan C=tan A tan B tan C

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