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Question

The numerical value of tan(π4)+tan(3π4)+tan(5π4)+tan(7π4)is

A
\N
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B
6
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C
2
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D
4
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Solution

The correct option is A \N
We know thattan (π4)=1tan (3π4)=1as 3π4 lies in the 2nd quadrantalso tan (5π4)=1as 5π4 lies in the 3rd quadrantand, tan (7π4)=1as 7π4 lies in the 4th quadrant.Thus,tan (π4)+tan (3π4)+tan (5π4)+tan (7π4)=11+11=0
Thus, 0 is the correct answer.

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