Find r'(t). r(t) = (tan-(7t))i+t cos(t)j – Vēk

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A: r(t)=t^2i+t^(13)j r'(t)=d(t^2i+t^(13)j)dt=2ti+13t^12j r''(t)=d(r'(t))dt=2(1)i+13×(12t^11)j…

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