Question

Cos(19pi/3)=?
Pls help me :(

Answer 1

Explanation:

Remove full rotations of
`2\pi` until the angle is between 0 and
`2\pi`.

`cos((\pi )/(3) )`

The exact value of
`cos((\pi )/(3))` is
`(1)/(2)`.

`(1)/(2)`

The result can be shown in multiple forms.

Exact Form:

`(1)/(2)`

Decimal Form:

`0.5`

Vocabulary:

Rotation

A transformation in which a figure is rotated through a given angle, about a point.

Angle

The union of two rays with a common endpoint, called the vertex.