A) 0
B) \[2\tan A\]
C) \[2\cot A\]
D) \[2(\tan A-\cot A)\]
Correct Answer: A
Solution :
\[\tan A+\cot (180{}^\circ +A)+\cot (90{}^\circ +A)+\cot (360{}^\circ -A)\] \[=\tan A+\cot A-\tan A-\cot A=0\].You need to login to perform this action.
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