Trigonomic Identities (Edexcel C3/c4)

Front 1

1 + cot^2 (x)

Back 1

Cosec^2 (x)

Front 2

1 + tan^2 (x)

Back 2

sec^2 (x)

Front 3

Cos(2x)

Back 3

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

Front 4

Sin(2x)

Back 4

2sin(x)cos(x)

Front 5

Tan(2x)

Back 5

[2tan(x)] / 1 - tan^2 (x)

Front 6

Cos(2x)

Back 6

2cos^2 (x) - 1

Front 7

Cos(2x)

Back 7

1 - 2sin^2 (x)