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

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

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

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  2. so would that be tan (8x)?

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  3. Not unless 7-1 = 8

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  4. sorry I did 7+1

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

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