Posted by **Jake** on Tuesday, January 24, 2012 at 9:49pm.

Could someone explain the steps for this question.

Simplify the expression

tan(5pi/8)-tan(3pi/8)/1+tan(5pi/8)tan(3pi/8)

- Math -
**Jake**, Tuesday, January 24, 2012 at 9:51pm
Options are

a) 0

b) 1

c) -1

d) undefined

- Math -
**Steve**, Wednesday, January 25, 2012 at 1:17pm
Recall your sum/difference formulas. You have

tan(5pi/8-3pi/8) = tan(pi/4)

so, (B)

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