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)

## Answer this Question

## Related Questions

- Trigonometry - Find the exact value of tan(a-b) sin a = 4/5, -3pi/2<a<-pi...
- PreCalculus - Hi I need some assistance on this problem find the exact value do ...
- trig - Solve the equation for cos theta-tan theta=0 for greater than or egual to...
- math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
- math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
- Precalculus/Trig 5 - Find the exact value of thet following trigonometric ...
- math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I ...
- pre-calc - Can someone help me find the exact value of 4csc(3pi/4)-cot(-pi/4)? ...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
- Trig - tan 15° using composite argument? - tan 15° tan (45°-30°) (tan 45° - tan ...

More Related Questions