cos²θ = 1 - sin²θ

cosθ = 1 + sin²θ

cosθ = 1 - sinθ

cos²θ = Adj/hyp

tan²θ = sec²θ + 1

tan²θ = sec²θ - 1

tanθ = secθ - 1

tan²θ = opp/adj

tan(x) = cos(x)/sin(x)

tan(x) = 1/cot(x)

tan(x) = sin(x)/cos(x)

tan(x) = opp/adj

csc² x

cot² x

sin² x

sec² x

1

csc ² x + sec ² x

sin ² x

1 - sin ² x