railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If tan(A + B) = 0, then –
1
tan A + tan B = 0
2
tan A = tan B
3
\(\frac{{2\tan A\; + \;\tan B}}{{1\; - \;\tan A\tan B}} = 1\)
4
\(\frac{{2\tan A\; + \;\tan B}}{{1\; + \;\tan A\tan B}} = 0\)