I am sure you meant:
(tan 7x − tan x)/( 1 + tan 7x tan x)
compare to :
tan(A-B) = (tanA - tanB)/(1 + tanAtanB)
Write the given expression as the tangent of an angle.
tan 7x − tan x/ 1 + tan 7x tan x
5 answers
so would that be tan (8x)?
Not unless 7-1 = 8
sorry I did 7+1
I guess that's what they did too as I had the same question and made the same mistake