Definitions
What is the sine angle?
The y-coordinate for any point on the Unit Circle
What is the radian for this degree: 30
pi/6
What is the degree for this radian: 3pi/4
135
sin(45) = ?
√2/2
sin-1(-1/2) = ?
-pi/6
What is the cosine angle?
Any x coordinate for any point on the Unit Circle
What is the radian for this degree: 120
2pi/3
What is the degree for this radian: 2pi
0
cos(210) = ?
-√3/2
cos-1(1/2) = ?
pi/3
What is the tangent angle?
A tan angle is equal to the y-coordinate divided by the x-coordinate
What is the radian for this degree: 90
pi/2
What is the degree for this radian: 11pi/6
330
csc(240) = ?
-2√3/3
tan-1(1) = ?
pi/4
What is a degree?
One degree is 1/360 of a complete circle, so there are 360 equally divided degrees in a circle
What is the radian for this degree: 225
5pi/4
What is the degree for this radian: 3pi/2
270
cot(330) = ?
-√3
cos-1(-√2/2) = ?
3pi/4
The angle in a unit circle that gives an arc length of one
What is the radian for this degree: 315
7pi/4
What is the degree for this radian: pi
180
sec(90) = ?
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cos-1(-√3/2) = ?
5pi/6