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Evaluate the Trigonometric Function Using Its Period as an Aid cos23π4\cos \frac { 23 \pi } { 4 }

Question 48

Multiple Choice

Evaluate the trigonometric function using its period as an aid.​ cos23π4\cos \frac { 23 \pi } { 4 }


A) cos23π4=22\cos \frac { 23 \pi } { 4 } = - \frac { \sqrt { 2 } } { 2 }
B) cos23π4=2\cos \frac { 23 \pi } { 4 } = - \sqrt { 2 }
C) cos23π4=2\cos \frac { 23 \pi } { 4 } = \sqrt { 2 }
D) cos23π4=22\cos \frac { 23 \pi } { 4 } = \frac { \sqrt { 2 } } { 2 }
E) cos23π4=\cos \frac { 23 \pi } { 4 } = \infty

Correct Answer:

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