Unit Circle Trig Values (Sine and Cosine in radians)
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
