Identities Flashcards
1
Q
Cscx
A
Sec(90-X)
Sec(pi/2-X)
2
Q
Tanx
A
Cot(90-X)
Cot(pi/2-X)
3
Q
Cos(A+B)
A
CosAcosB-sinAsinB
4
Q
Sin(A+B)
A
SinAcosB+cosAsinB
5
Q
Sin2A
A
2sinAcosA
6
Q
Cos2A
A
2cos^2-1
7
Q
Tan2A
A
(2tanA)/(1-tan^A)
8
Q
Sinx
A
Cos(90-X)
Cos(pi/2-X)
