Mr. K's Period 4 Precalc Blog: HW #39 Section 6.3

Sunday, January 28, 2007

Can anyone explain the proof in 36a?

Casey Blue said...: I basically said something along the lines of "Tan(t) is the slope of a ray. Adding 2pi will create an angle with a terminal ray in the same spot as t. Thus t and (t+2pi) have the same slope and the same tangent."

If you want to use an identity, you could use the fact that we know tangent's period is pi. Since 2pi is a multiple of pi, tan(t)=tan(t+2pi).; 12:01 PM