Page 9 - Dahlia Oktaviani Ginting_4193312002_FlipBook

I 0 = 1 = 0 = 0 I

y

0

sin
1
cos 0 = x = 1 = 1
0
1 1
y 0
tan 0 = = = 0
0
x 1
0
If  = P 90 , then the line OP coincides with the X axis
) , as a result:
with (0
,1
y
90 =

0
sin
1
1 = 1 = 1
x 0
cos 90 = = = 0
0
1 1
y 1
tan 0 = = , undefined.
0
x 0
The value of trigonometric ratios for special angles is
usually presented in the form of a table as follows.
0 0 0 0 0 0
 0 30 45 60 90
sin  0 1 2 1 2 2 1 2 3 1
0
cos  1 1 3 1 2 1 0
0
2 2 2
tan  0 1 3 1 3 
0
3

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