#### Number of Protons in the Nucleus of an Atom

Atoms are the small particles of which every element is made up of. The atom possesses the properties of its element.

To get the Cosine angle, please insert the values for the adjacent angle and hypotenuse angle and our Cosine Calculator will solve it for you.

In trigonometry, the cosine formula or the law of cosines which is also called as the cosine rule applies the lengths from the sides of a triangle towards the cosine of 1 of its angles. Making use of notation as in the image below, law of cosines says: c^2 = a^2 + b^2 - 2ab/cos/gamma. |

Inverse cosine is actually a multi-valued function cos^(-1)z, furthermore denoted arccosz (Abramowitz as well as Stegun 1972, p. 79; which is the inverse function of a cosine. The variations Arccosz (for instance, Beyer 1987, p. 141; Semendyayev and Bronshtein, 1997, p. 69) and Cos^(-1)z are occasionally used to consult explicit primary values of a inverse cosine