1.

Find the value of tan 11pi /4​

Answer»

★ 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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