Use the even-odd properties of the trigonometric functions to find the exact value of the...

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Use the even-odd properties of the trigonometric functions to find the exact value of the given expression. Do not use a calculator.cos (-60)Select the correct choice below and fill in any answer boxes in your choice.A. cos (-60)=(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)B. The answer is undefined.

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