Double-Angle Identities Flashcards
1
Q
cos2x=
A
cos^2(x)-sin^2(x)
2cos^2(x)-1
1-2sin^2(x)
2
Q
sin2x=
A
2sin(x)cos(x)
3
Q
tan2x=
A
2tan(x)/1-tan^2(x)
cos2x=
cos^2(x)-sin^2(x)
2cos^2(x)-1
1-2sin^2(x)
sin2x=
2sin(x)cos(x)
tan2x=
2tan(x)/1-tan^2(x)