Use the chain rule to find dz/dt. Z = sqrt(4 + x² + y²), x = 2ln(t), y = cos(t)

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Question:

Use the chain rule to find dz/dt. 
Z = sqrt(4 + x² + y²), x = 2ln(t), y = cos(t) 

Answer:

Detailed explanation is provided below:

Here chain rule is used to find dz/dt. Formula of chain rule is written in below image. 


For any queries regarding above solution please comment below. 

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