There are two coloured pencils: red and blue. The tip of the red pencil is ng the x-axis and the tip of the blue pencil is moving along the y-axis. The the tips of the red and blue pencils at time t are given by differentiable t) and b(t), respectively. We know that r(t) = sin(t) – 2. However, we know e tip of the blue pencil moves along the positive y-axis with b(0) = b'(0) = 1. %3D

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