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Find the Specified Quantity $y = - 5 \cos \left( \frac { 1 } { 4 } x + \frac { \pi } { 3 } \right)$

Question 98

Multiple Choice

Find the specified quantity.
-Find the period of $y = - 5 \cos \left( \frac { 1 } { 4 } x + \frac { \pi } { 3 } \right)$ .

A) $\frac { 2 \pi } { 3 }$
B) $4 \pi$
C) $8 \pi$
D) $5 \pi$

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