Trigonometric Identities

Front 1

1 + tan^2(x) =

Back 1

sec^2 (x)

Front 2

1+ cot^2(x) =

Back 2

csc^2(x)

Front 3

sin2x =

Back 3

2sinxcosx

Front 4

cos2x =

Back 4

cos^2(x) - sin^2(x)

2cos^2(x) - 1

1 - 2sin^2(x)

Front 5

sin^2(x) =

Back 5

1/2 (1- cos2x)

Front 6

cos^2(x) =

Back 6

1/2 (1+cos2x)