Trig rules Flashcards
1
Q
secx
A
1/cosx
2
Q
cosecx
A
1/sinx
3
Q
cotx
A
1/tanx
4
Q
1 + tan²x
A
sec²x
5
Q
1 + cot²x
A
cosec²x
6
Q
sin(A+B)
A
sinAcosB + cosAsinB
7
Q
cos(A+B)
A
cosAcosB - sinAsinB
8
Q
sin(A-B)
A
sinAcosB - cosAsinB
9
Q
cos(A-B)
A
cosAcosB + sinAsinB
10
Q
tan(A+B)
A
tanA + tanB / 1 - tanAtanB
11
Q
tan(A-B)
A
tanA - tanB / 1 + tanAtanB
12
Q
sin2A
A
2sinAcosA
13
Q
cos2A
A
cos²A - sin²A
2cos²A - 1
1 - 2sin²A
14
Q
tan2A
A
2tanA / 1 - tan²A
