The Unit Circle Flashcards
1
Q
Cosine
A
x-axis
2
Q
Sine
A
y-axis
3
Q
0
A
Cos = 1 Sin = 0
4
Q
π/6
A
Cos = √3 / 2
Sin = 1 / 2
30 degrees
5
Q
π/4
A
Cos = √2 / 2
Sin = √2 / 2
45 degrees
6
Q
π/3
A
Cos = 1/2
Sin = √3 / 2
60 degrees
7
Q
π/2
A
Cos = 0
Sin = 1
90 degrees
8
Q
2π/3
A
Cos = -1/2
Sin = √3 / 2
120 degrees
9
Q
3π/4
A
Cos = -√2 / 2
Sin = √2 / 2
135 degrees
10
Q
5π/6
A
Cos = - √3 / 2
Sin = 1 / 2
150 degrees
11
Q
π
A
Cos = -1
Sin = 0
180 degrees
12
Q
7π/6
A
Cos = - √3 / 2
Sin = - 1 / 2
210 degrees
13
Q
5π/4
A
Cos = -√2 / 2
Sin = -√2 / 2
225 degrees
14
Q
4π/3
A
Cos = -1 / 2
Sin = - √3 / 2
240 degrees
15
Q
3π/2
A
Cos = 0
Sin = -1
270 degrees
16
Q
5π/3
A
Cos = 1 / 2
Sin = - √3 / 2
300 degrees
17
Q
7π/4
A
Cos = √2 / 2
Sin = - √2 / 2
315 degrees
18
Q
11π/6
A
Cos = √3 / 2
Sin = -1 / 2
330 degrees
19
Q
2π
A
Cos = 1
Sin = 0
360 degrees
20
Q
Quadrant I
A
Sin, cos, and tan are positive
21
Q
Quadrant II
A
Sin is positive
22
Q
Quadrant III
A
Tan is positive
23
Q
Quadrant IV
A
Cos is positive
