Question: I'm having a hard time understanding this practice problem. I found the first derivative as -2sin(2x) and tried to plug in -2 as x an

I'm having a hard time understanding this practice problem. I found the first derivative as -2sin(2x) and tried to plug in -2 as x an then multiply by -5 getting 2 but the answer is wrong. Can you explain how this problem should be solved?

Assume that @ and y are both differentiable functions of t and are related by the equation 7 - Cos ( 2) Find when te given - -5 when = Enter the exact answer dy

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