Evaluate the Trigonometric Function Using Its Period as an Aid

question 43

Multiple Choice

Evaluate the trigonometric function using its period as an aid. ​
Cos 8π
​

• A)cos 8π = -8
• B)cos 8π = 0
• C)cos 8π = 8
• D)cos 8π = ∞
• E)cos 8π = 1

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