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Use the chain rule to find dy/dx of trigonometry function

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Dear People,
Please list all steps even the ones that seem obvious. I was able to do the following problem but I'm unable to do the next one.

This is the problem that I was able to do.
Use the Chain Rule to find dy/dx

The problem is the one that I'm having problems with. I don't understand how to differentiate Dx u sin u (what happens or what do you do with the u in front of sin u). Please also finish the problem.

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The chain rule is applied to finding a derivative. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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Please list all steps even the ones that ...

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  • BSc, Meerut University
  • MSc, Meerut University
  • MPhil, Institute of Advanced Studies
  • MSc, AIT
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