Trigonometry Flashcards
(38 cards)
1
Q
sin 30
A
1/2
2
Q
cos 30
A
√3/2
3
Q
tan 30
A
√3
4
Q
sin 60
A
√3/2
5
Q
cos 60
A
1/2
6
Q
tan 60
A
√3
7
Q
sin 45
A
1/√2
8
Q
cos 45
A
1/√2
9
Q
tan 45
A
1
10
Q
sin rule
A
sin A/a = sin B/b = sin C/c
11
Q
cosine rule (side)
A
c^2 = a^2 + b^2 - 2 * a * b * cos C
12
Q
cosine rule (angle)
A
cos C = (a^2 + b^2 - c^2)/2 * a * b
13
Q
Area of a triangle without a right angle
A
1/2 * a * b * sin C
14
Q
Quadrant 1 (All)
A
y = sin Θ
x = cos Θ
y/x = tan Θ
15
Q
Quadrant 2 (Stations)
A
sin (180 - Θ) = sin Θ
cos (180 - Θ) = - cos Θ
tan (180 - Θ) = - tan Θ
16
Q
Quadrant 3 (To)
A
sin (180 + Θ) = - sin Θ
cos (180 + Θ) = - cos Θ
tan (180 + Θ) = tan Θ
17
Q
Quadrant 4 (Central)
A
sin (360 - Θ) = - sin Θ
cos (360 - Θ) = cos Θ
tan (360 - Θ) = - tan Θ
18
Q
sin (0, 360)
A
0
19
Q
sin (90)
A
1
20
Q
sin (180)
A
0
21
Q
sin (270)
A
-1
22
Q
cos (0, 360)
A
1
23
Q
tan (0, 360)
A
0
24
Q
cos (90)
A
0
25
tan (90)
Undefined
26
cos (180)
-1
27
tan (180)
0
28
cos (270)
0
29
tan (270)
Undefined
30
cosecΘ
1/sinΘ
31
secΘ
1/cosΘ
32
cotΘ
sinΘ/cosΘ or 1/tanΘ
33
cosΘ
sin(90-Θ)
34
cosecΘ
sec(90-Θ)
35
cotΘ
tan(90-Θ)
36
sin^2+cos^2
1
37
1+cot^2Θ
cosec^2Θ
| one and a cot is cosy
38
1+tan^2Θ
sec^2Θ
| one and a tan is sexy
