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  1. What is the value of tan
    π
    		 + x?
    4

    1. 1 - tanx
      1 + tanx
    2. 1 + tanx
      1 - tanx
    3. 1 + cotx
      1 - cotx
    4. 1 - cotx
      1 + cotx
Correct Option: B

tan=tan
π
 + tan x
π
 + x4
41 - tan
π
 tan x
4

∵ tan(A + b)
tanA + tanB
1 - tanA tanB

=
1 + tanx
1 - tanx


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