Trigonometry Flashcards
1
Q
Range of sine
A
-1 β€ sin π β€ 1
2
Q
Range of cosine
A
-1 β€ cos π β€ 1
3
Q
Basic identify No. 1
A
sin^2π + cos^2π = 1
4
Q
Basic identify No. 2
A
tan πΈ = sin πΈ / cos πΈ
5
Q
Basic identify No. 3
A
tan^2 πΈ + 1 = sec^2 πΈ
6
Q
Basic identify No. 4
A
cot πΈ = cosπΈ / sinπΈ
7
Q
Period of sin(πΌπ) and cos(πΌπ)
A
2π /π°
8
Q
Period of tan(πΌπ)
A
π/πΌ
9
Q
Complementary angles
cos π
A
sin(π/2 - π)
10
Q
Complementary angles
sin π
A
cos(π/2 - π)
11
Q
Symmetry
sin(-π)
A
βsin π
12
Q
Symmetry
cos(-π)
A
cos π
13
Q
Addition formula
sin(π Β± πΊ)
A
sin π cos πΊ Β± cos π sin πΊ
14
Q
Addition formula
cos(π Β± πΊ)
A
cos π cos πΊ β sin π sin πΊ
15
Q
Double angle formula for sine
A
sin(2ΞΈ) = 2sin(ΞΈ) cos(ΞΈ)
