Sin Cos Tan (90°,180°, 270°, 360°)
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Cos 180°
-1
Sin 270°
-1
Cos 270°
0
Cos 90°
0
Sin 180°
0
Sin 360°
0
Tan 180°
0
Tan 270°
0
Tan 360°
0
Cos 360°
1
Sin 90°
1
Tan 90°
Undefined
Pythagorean Identities
sin^2x + cos^2x = 1 1 + tan^2x = sec^2x csc^2x = 1 + cot^2x
