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Solve the Problem dwdt\frac { \mathrm { dw } } { \mathrm { dt } }

Question 115

Multiple Choice

Solve the problem.
-Evaluate dwdt\frac { \mathrm { dw } } { \mathrm { dt } } at t=52π\mathrm { t } = \frac { 5 } { 2 } \pi for the function w=xyz;x=sint,y=cost,z=t2\mathrm { w } = \frac { \mathrm { xy } } { \mathrm { z } } ; \mathrm { x } = \sin \mathrm { t } , \mathrm { y } = \cos \mathrm { t } , \mathrm { z } = \mathrm { t } ^ { 2 } .


A) 425(1π2) - \frac { 4 } { 25 } \left( \frac { 1 } { \pi ^ { 2 } } \right)
B) 12(1π2) \frac { 1 } { 2 } \left( \frac { 1 } { \pi ^ { 2 } } \right)
C) 12(1π2) - \frac { 1 } { 2 } \left( \frac { 1 } { \pi ^ { 2 } } \right)
D) 12(1π) - \frac { 1 } { 2 } \left( \frac { 1 } { \pi } \right)

Correct Answer:

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