Find the value of tan 11pi /4
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★ 11π/4 can be written as (3π-π/4).
Thus,
tan(11π/4) = tan(3π-π/4)
[3π-π/4] lies in second quadrant => tan(A) is -ve.
= -tan(π/4)
= -(1)
= -1
Therefore, tan(11π/4) = -1.
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