Asked by terry

Write the given expression as the tangent of an angle.
tan 7x − tan x/ 1 + tan 7x tan x

9 years ago

Answered by Reiny

I am sure you meant:
(tan 7x − tan x)/( 1 + tan 7x tan x)

compare to :
tan(A-B) = (tanA - tanB)/(1 + tanAtanB)

9 years ago

Answered by megan

so would that be tan (8x)?

9 years ago

Answered by Steve

Not unless 7-1 = 8

9 years ago

Answered by Jessica Maths

sorry I did 7+1

9 years ago

Answered by Jessica Maths

I guess that's what they did too as I had the same question and made the same mistake

9 years ago

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