Formulas
Coordinates
Reference Angle
Radians
Definitions
100
This trigonometry ratio uses the fraction adjacent over hypotenuse.
What is cosine(x)
100
sin 90 degrees
What is 1
100
The angle corresponding to this reference angle is 150 degrees.
What is 30 degrees.
100

The conversion from this radian measure to degrees is 180 degrees.

What is pi?

100

The sine of an angle.

What is opposite/hypotenuse?

200
This equation is a way of finding the x-coordinate on a unit circle.
What is x=cos(theta)
200
sine of 150 degrees
What is 1/2 or .5
200
The angle corresponding to this reference angle is 45 degrees.
What is 45 degrees
200
The conversion from this radian measure to degrees is 90 degrees.
What is pi/2.
200

The tangent of an angle.

What is opposite/adjacent?

300

This trigonometry ratio uses the fraction opposite over hypotenuse.

What is sine?

300
DAILY DOUBLE
The cosine of 3*pi/2.
300
The angle corresponding to this reference angle is 240 degrees.
What is 60 degrees
300
The conversion from this radian measure to degrees is 135 degrees.
What is 3*pi/4.
300

Tangent using two other trig functions.

What is sin/cos?

400
This equation gives us the y-coordinate on the unit circle.
What is y=sin(theta)
400
The sine of 4*pi/3.
What is - sqrt(3)/2
400
The angle corresponding to this reference angle is 2*pi/3.
What is 60 degrees ( or pi/3).
400
The conversion from this radian measure to degrees is 330 degrees.
What is 11*pi/6.
400

You multiply by this to convert from degrees to radians.

What is pi/180?

500
DAILY DOUBLE
This equation uses the terms of sine and cosine to find another trig. ratio.
500
sine of 7*pi/4.
What is -sqrt(2)/2
500

The angle is in the 3rd quadrant and has a reference angle pi/4.

What is 5pi/4 radians?

500
The conversion from this radian measure to degrees is 390 degrees.
What is 13*pi/6.
500

The number of radians in a whole circle.

What is 2pi?

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