use the even - odd properties of the trigonometric functions to find the exact value of \\( \\cos ( - 60 ^ {…

use the even - odd properties of the trigonometric functions to find the exact value of \\( \\cos ( - 60 ^ { \\circ } ) \\).\nselect the correct choice below and fill in any answer boxes in your choice.\na. \\( \\cos ( - 60 ^ { \\circ } ) = \\)\n(simplify your answer, including any radicals. use integers or fractions for ar\nb. the answer is undefined.

use the even - odd properties of the trigonometric functions to find the exact value of \\( \\cos ( - 60 ^ { \\circ } ) \\).\nselect the correct choice below and fill in any answer boxes in your choice.\na. \\( \\cos ( - 60 ^ { \\circ } ) = \\)\n(simplify your answer, including any radicals. use integers or fractions for ar\nb. the answer is undefined.

Answer

Explanation:

Step1: Recall the even - odd property of cosine function

The cosine function is an even function, which means ( \cos(-\theta)=\cos\theta). So, ( \cos(-60^{\circ})=\cos60^{\circ}).

Step2: Find the value of ( \cos60^{\circ})

We know that ( \cos60^{\circ}=\frac{1}{2}).

Answer:

(\frac{1}{2})