Evaluate the Trigonometric Function Using Its Period as an Aid $\cos \frac { 5 \pi } { 3 }$

question 210

Multiple Choice

Evaluate the trigonometric function using its period as an aid. $\cos \frac { 5 \pi } { 3 }$

• A) \(\cos \frac { 5 \pi } { 3 } = \infty\)
• B) \(\cos \frac { 5 \pi } { 3 } = - \frac { 1 } { 2 }\)
• C) \(\cos \frac { 5 \pi } { 3 } = 2\)
• D) \(\cos \frac { 5 \pi } { 3 } = - 2\)
• E) \(\cos \frac { 5 \pi } { 3 } = \frac { 1 } { 2 }\)

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