Fundamental Trigonometric Identities

sin x

1/csc x

cos x

1/sec x

tan x

1/ cotx

csc x

1/ sin x

sec x

1/cos x

cot x

1/ tan x

tan x (quotient identities)

sin x/ cox x

cot x (Quotient identities )

cos x/ sin x

1-sin² x

cos² x

1-cos² x

sin² x

1+tan² x

sec² x

sec² x-1

tan² x

1+cot² x

csc² x

csc² x-1

cot² x

sin(π/2-u)

cos u

tan(π/2-u)

cot u

sec(π/2-u)

csc u

cos(π/2-u)

sin u

cot(π/2-u)

tan u

csc(π/2-u)

sec u