Unit Circle Trig Values (Sine and Cosine in radians)

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cos 3π/4

-√2/2

cos 5π/4

-√2/2

sin π

0

cos 0

1

cos 2π

1

sin 5π/6

1/2

Degree

An angle measurement

cos π/4

√2/2

sin 3π/4

√2/2

sin π/4

√2/2

cos π/6

√3/2

sin 2π/3

√3/2

sin π/3

√3/2

cos π

-1

sin 3π/2

-1

cos 2π/3

-1/2

cos 4π/3

-1/2

sin 11π/6

-1/2

sin 7π/6

-1/2

sin 5π/4

-√2/2

sin 7π/4

-√2/2

cos 5π/6

-√3/2

cos 7π/6

-√3/2

sin 4π/3

-√3/2

sin 5π/3

-√3/2

cos 3π/2

0

cos π/2

0

sin 0

0

sin 2π

0

sin π/2

1

cos 5π/3

1/2

cos π/3

1/2

sin π/6

1/2

Radian

An angle measurement that uses π

Terminal Point

An ordered pair that corresponds to an angle on the unit circle

csc θ

Cosecant is the reciprocal of the y value

cot θ

Cotangent is x/y on the unit circle

Rationalize the denominator

Rationalize an answer means multiply the denominator and numerator of a fraction to get rid of a square root √

sec θ

Secant is the reciprocal of the x value

cos θ

The x value of a point on the unit circle

sin θ

The y value of a point on the unit circle

tan θ

The y/x on a unit circle

cos 7π/4

√2/2

cos 11π/6

√3/2


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