l

radian

degree

cos^2 x + sin^2 x

1 + tan^2 x

1 + cot^2 x

cos (2nπ + x)

sin (2nπ + x)

sin(-x)

cos(-x)

cos(x+y)

cos(x-y)

cos(π/2-x)

sin(π/2-x)

sin(x+y)

sin(x-y)

cos (π/2 + x)

sin (π/2 + x)

cos (π – x)

sin (π – x)

cos (π + x)

sin (π + x)

cos (2π – x)

sin (2π – x)

tan(x+y)

tan(x-y)

cot(x+y)

cot(x-y)

cos2x

sin2x

tan2x

sin3x

cos3x

tan3x

cosx+cosy

cosx-cosy

sinx+siny

sinx-siny

2cosxcosy

-2sinxsiny

2sinxcosy

2cosxsiny

sinx = 0

cosx = 0

sin x = sin y

cos x = cos y

tan x = tan y

2sin^2 X/2

2cos^2 x/2

tan θ/2

sin(A+B) sin(A-B)

cos(A+B) cos(A-B)

tan(A+B) tan(A-B)

Sine Formula

Cosine Formula