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Find Dy/dt y=(ecos(t/9))4y = \left( e ^ { \cos ( t / 9 ) ) ^ { 4 } } \right.

Question 489

Multiple Choice

Find dy/dt.
- y=(ecos(t/9) ) 4y = \left( e ^ { \cos ( t / 9 ) ) ^ { 4 } } \right.


A) 49(esin(t/9) ) 3- \frac { 4 } { 9 } \left( e ^ { \sin ( t / 9 ) ) ^ { 3 } } \right.
B) 49sin(t9) e3cos(t/9) \frac { 4 } { 9 } \sin \left( \frac { \mathrm { t } } { 9 } \right) \mathrm { e } ^ { 3 \cos ( \mathrm { t } / 9 ) }
C) 49sin(t9) e4cos(t/9) - \frac { 4 } { 9 } \sin \left( \frac { \mathrm { t } } { 9 } \right) \mathrm { e } ^ { 4 \cos ( \mathrm { t } / 9 ) }
D) 49cos(t9) e4cos(t/9) \frac { 4 } { 9 } \cos \left( \frac { t } { 9 } \right) \mathrm { e } ^ { 4 \cos ( \mathrm { t } / 9 ) }

Correct Answer:

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