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


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