What is arccos of sin(x)?

Arccosine of sine of x.

The arccosine of sine of x is equal to (when k is integer number k∈ℤ):

arccos( sin x ) = π/2 - arcsin( sin x )

= π/2 - (x+2kπ)

= -x - 2kπ + π/2

= -x + (0.5-2k)π

Arccos function →