,
,
C
,
,
b a
A c B
sin:R [-1,1]
y
1
0 p 2p x
-1
sin(-x) = -sin x, sin(x + 2kp) = sin x, (k Z)
cos:R [-1,1] y
1
0 p 2p x
![]() |
-1
cos(-x) = cos x, cos (x + 2kp) = cos x, (k Z)
tg:R\ R
y tg(-x)
= -tg x
tg(x+kp) = tg x, (k Z)
-
0 2p x
![]() |
ctg:R\ R
y ctg(-x)
= -ctg x
ctg(x + kp) = ctg x, (k Z)
0 x
|