1 Sprays and grease can leave a residue on non-stick pans that is difficult to remove. 2  Start by mixing water and baking soda to make a paste. 3  Spread the paste on the residue. 4  Scrub the surface with a nylon scrubber.
In mathematics, the inverse trigonometric functions (occasionally called cyclometric functions) are the inverse functions of the trigonometric functions (with suitably restricted domains). Specifically, they are the inverses of the sine, cosine, tangent, cotangent, secant, and cosecant functions.
The inverse cosine function - arccos. For every trigonometry function such as cos, there is an inverse function that works in reverse. These inverse functions have the same name but with 'arc' in front. So the inverse of cos is arccos etc. When we see arccos A, we interpret it as the angle whose cosine is A.