Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$V_{1}=5\frac{d}{dt}(3\ \cos\ 15ot)+1\frac{d}{dt}(4\ sin|5ot)|$$

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