Trigonometry Flashcards
1
Q
Arc Length
A
θr
2
Q
Sector Area
A
1/2 r^2 θ
3
Q
Segment Area
A
1/2 r^2 (θ - sin θ)
4
Q
tan θ equation
A
sin θ/cos θ
5
Q
cot θ
A
cos θ/sin θ
6
Q
Trig equations which = 1
A
cos^2 θ + sin^2 θ = 1
cot^2 θ - cosec^2 θ = 1
tan^2 θ - sec^2 θ = 1
7
Q
sin 2θ
A
2 sin θ cos θ
8
Q
cos 2θ
A
cos^2 θ - sin^2 θ
9
Q
tan 2θ
A
(2tan θ) / (1 - tan^2 θ)
10
Q
sin (a + b)
A
sin a cos b + cos a sin b
11
Q
sin (a - b)
A
sin a cos b - cos a sin b
12
Q
cos (a + b)
A
cos a cos b - sin a sin b
13
Q
cos (a - b)
A
cos a cos b + sin a sin b
14
Q
tan (a + b)
A
(tan a + tan b) / (1 - tan a tan b)
15
Q
tan (a - b)
A
(tan a - tan b) / (1 + tan a tan b)
