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Question

The value of tan(2tan115π4) is

A
717
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B
516
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C
54
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D
717
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Solution

The correct option is A 717
Solution:
tan(2tan115π4)=
=tan(tan1512tan11) ....... [2tan1x=tan12x1x2]
=tan(tan1717) ...... [tan1x+tan1y=tan1xy1+xy]
=717
Hence, A is the correct option.

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