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sin 0º
0
sin 30º
1/2
sin 45º
√2/2
sin 60º
√3/2
sin 90º
1
cos 0º
1
cos 30º
√3/2
cos 45º
√2/2
cos 60º
1/2
cos 90º
0
sin θ =
y/r
cos θ =
x/r
tan θ =
y/x
What quadrants is sin positive?
I, II
What quadrants is cos positive?
I, IV
What quadrants is tan positive?
I, III