A) \[\tan A\,\tan B+\tan \,C\]
B) \[\tan \,B-\tan \,C-\tan \,A\]
C) \[\tan A+\tan C-\tan B\]
D) \[-\,(\tan A\tan B+\tan C)\]
Correct Answer: B
Solution :
\[B=A+C\Rightarrow \tan B=\tan (A+C)\] Þ \[\tan B=\frac{\tan A+\tan C}{1-\tan A\tan C}\] Þ \[\tan A\tan B\tan C=\tan B-\tan A-\tan C\].You need to login to perform this action.
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