1
Q
What is a radian
A
1 radian angle at center whose arc length = radius
2
Q
Convert degrees to radians
A
Multiply by pi
———
180°
3
Q
Convert radians to degrees
A
X 180
———
Pi
4
Q
Reciprocal of sine
A
Cosecant
Csc
5
Q
Csc
A
1/sin = 1/opp/hyp = hyp/opp
6
Q
Reciprocal of tangent
A
Cotangent
Cot
7
Q
Cot
A
1/tan= 1/opp/adj =adi/opp
8
Q
Reciprocal of cosine
A
Secant
Sec
9
Q
Sec
A
1/cos= 1/adj/ hyp = hyp/adj
10
Q
Sin 45
A
√2 / 2
11
Q
Cos 45
A
√2 / 2
12
Q
Tan 45
A
1
13
Q
Sin 30
A
1/2
14
Q
Cos 30
A
√3 / 2
15
Q
Tan 30
A
√3 / 3
16
Q
Sin 60
A
√3 / 2
17
Q
Cos 60
A
1/2
18
Q
Tan 60
A
√3
19
Q
Sin 90
A
1
20
Q
Cos 90
A
0
21
Q
Tan 90
A
Undefined
22
Q
Sin 0
A
0
23
Q
Cos 0
A
1
24
Q
Tan 0
A
0
25
The formula for the area of a general triangle
A = 1/2 ab sin c
Math
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