Trig Flashcards
1
Q
2π
A
360°
2
Q
π
A
180°
3
Q
π/2
A
90°
4
Q
π/3
A
60°
5
Q
π/4
A
45°
6
Q
π/6
A
30°
7
Q
sin30
A
1/2
8
Q
sin60
A
sqrt3 /2
9
Q
sin45
A
sqrt2/2
10
Q
cos30
A
sqrt3 /2
11
Q
cos60
A
1/2
12
Q
cos45
A
sqrt2/2
13
Q
tan30
A
sqrt3/3
14
Q
tan60
A
sqrt3
15
Q
tan45
A
1
16
Q
Sinθ=
A
(180-θ)+360
17
Q
cosθ
A
(360-θ)+360
18
Q
tanθ
A
180
19
Q
cosecθ
A
1/sinθ
20
Q
secθ
A
1/cosθ
21
Q
cotθ
A
1/tanθ or cosθ/sinθ
22
Q
sin cofunction
A
cos(90-θ)
23
Q
cos cofunction
A
sin(90-θ)
24
Q
sin^2θ identity
A
sin^2 + cos^2 = 1
25
Q
sec^2 identity
A
1 + tan^2 = sec^2
26
Q
cosec^2 identity
A
1 + cot^2 = cos^2
27
Q
sin2θ
A
2sinθcosθ
28
Q
cos2θ
A
cos^2θ-sin^2θ
2cos^2θ -1
1-2sin^2θ
29
Q
tanθ
A
2tanθ/1-tan^2θ
30
Q
sin^2θ rearranged double angle formula
A
1/2 - 1/2cos2θ
31
Q
cos^2θ
A
1/2 + 1/2cos2θ
32
Q
If Rcosθ=a and Rsinθ=b, what is R and what is θ
A
R = sqrt(a^2 + b^2)
tanθ=b/a (s/c)
