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Formulas
Coordinates
Reference Angle
Radians
Unit Circle
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/6.
100

Find cos(5π/6)

What is -√3/2

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

Find tan(4π/3)

What is √3

300
This trigonometry ratio uses the fraction hypotenuse over opposite.
What is cosecant(theta)
300

The cosine of 3*pi/2.

What is 0.

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

Where is sinx = cosx on the interval [0, 2π ) ?

What is π/4 and 5π/4

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

Find sec(2π/3)

What is -2

500

This equation uses the terms of sine and cosine to find another trig. ratio.

What is tan=y/x or tan= sin/cos

500
sine of 7*pi/4.
What is -sqrt(2)/2
500
The angle corresponding to this reference angle is 7*pi/4.
What is 45 degrees (or pi/4).
500
The conversion from this radian measure to degrees is 390 degrees.
What is 13*pi/6.
500

Where is secx = cscx on the interval [0, 2π ) ?

What is π/4 and 5π/4