1.

If tan(A + B) = 0, then –

A. tan A + tan B = 0
B. tan A = tan B
C. \(\frac{{2\tan A\; + \;\tan B}}{{1\; - \;\tan A\tan B}} = 1\)
D. \(\frac{{2\tan A\; + \;\tan B}}{{1\; + \;\tan A\tan B}} = 0\)
Answer» B. tan A = tan B


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