Find the reference angle and the exact function value. cos 480° What is the reference angle? Select the correct choice below and, if necessary, fill in the answer box to complete your answer. O A. The given angle is not quadrantal, so the reference angle is O B. There is no reference angle because the angle is quadrantal. What is cos 480°? Select the correct choice below and, if necessary, fill in the answer box to complete your answer. O A. cos 480° =| | (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) O B. The value is undefined.

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A: The given question is solved below.

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Angles

In mathematics, angles constitute a very important part. Just like the concept of lines, an angle is a necessary figure that is used for measurement. How do you define its formation? It is formed when two or more lines meet at a point. The point at which two or more lines meet is known as the vertex. When the lines get inclined at this point, they do form various angles. Angles are measured from the vertex in terms of degrees.