Given the following functions:
sin(π/2−x)
cos(π/2−x)
tan(π/2−x)
Let's determine their respective co-function identity.
sin(π/2−x) = cosx
cos(π/2−x) = sinx
tan(π/2−x) = cotx
The cofunction identities show the relationship between sine, cosine, tangent, cotangent, secant and cosecant. The value of a trigonometric function of an angle equals the value of the cofunction of the complement.
