show ur work plz
2007-04-25 07:31:08 · 4 answers · asked by elona 1 in Science & Mathematics ➔ Mathematics
draw a unit circle
Find the end point of the angle
determine the sign
tan(-pi) =tan pi=sinpi/cospi= 0/-1=0
2007-04-25 07:40:11 · answer #1 · answered by iyiogrenci 6 · 0⤊ 1⤋
tan(-(3 * pi)) = 0
--- http://www.google.com/search?q=tan%28-3pi%29&hl=en&safe=off
2007-04-25 07:34:47 · answer #2 · answered by DanE 7 · 0⤊ 0⤋
tan(-3 pi)=tan(-3 pi + 2 pi)=tan(-pi)=tan(-pi + 2 pi)=tan(pi)
=sin(pi)/cos(pi)=(0)/(-1)=0
2007-04-25 07:36:13 · answer #3 · answered by Anonymous · 1⤊ 0⤋
tan repeats every 2π
so tan(-3π) = tan(-3π + 2π) = tan(-π)
tan is an odd fuction so tan(-π) = -tan(π)
and tan(π) = 0
[tan(π) = sin(π) / cos(π); sin(π) = 0 and cos(π) = -1; 0/-1 = 0]
so tan(-3π) = 0.
2007-04-25 07:42:22 · answer #4 · answered by peateargryfin 5 · 1⤊ 0⤋