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Question

If A=60o and B=30o, verify that tan(A+B)=tanA+tanB1tanAtanB.

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Solution

L.H.S.=tan(60+30)=tan
R.H.S.=tan60+tan301tan30tan60
=3+131(3)(13)=3+1311
L.H.S.=R.H.S.

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