Trig Identities Flashcards
1
Q
sec x ^2
A
1+tan x ^2
2
Q
cosec x^2
A
1+cot x ^2
3
Q
sin2A
A
2sinAcosA
4
Q
sin x ^2+cos x ^2
A
1
5
Q
cos2A
A
cos(x)^2-sin(x)^2
2cos(x)^2-1
1-sin^2(x)
6
Q
tan2A
A
1-tan(A)^2
7
Q
sin(A+B)
A
sinAcosB+cosAsinB
8
Q
cos(A+B)
A
cosAcosB-sinAsinB
9
Q
tan(A+B)
A
1-tanAtanB
10
Q
cos x ^2
A
1+cot x ^2
