Indian Institute of Foreign Trade 2008 Solved Paper

© examsiri.com

Question : 57 of 150

Marks: +1, -0

If

tanx+tan(x+3)+tan(x+(2π/3)=3

then which of the following is correct?

tan x = 1
tan 2x = 1
tan 3x = 1
None of the above

Solution:

tan(a-

π/3

)+tan(a)+tan(a+

π/3

)=3
know that
tan(a − b) =

(tan(a)-tan(b))/(1+tan(a)*tan(b))

Therefore,

tan(a-π/3)

=

(tan(a)-tan(π/3))/(1+tan(a)*tan(b))

© examsiri.com

Go to Question:

Prev Question

Next Question