Use the even-odd properties of the trigonometric functions to find the exact value of the cos(-(pi )/(4)) Select the correct choice below and fill in any answer boxes in your choice. cos(-(pi )/(4))= (Simplify your viswer, including any radicals. Use integers or fractions for ar B. The answer is undefined.

Question

Answer 1

To find the exact value of

using the even-odd properties of trigonometric functions, we can use the following property:The cosine function is an even function, which means that

.Therefore, we can rewrite the expression as:

Now, we need to find the exact value of

.The angle

is a special angle in the unit circle, and its cosine value is

.Therefore, the exact value of

is

.So, the correct choice is:A.

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