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v(t)=-(t-1)sin(t^2/2) Find all times t in the open interval 0 < t < 3 when the particle changes direction Pleeeease no vague answers. I need help with calculations too.

Even though its different colors, it is not the colors of the rainbow. So if people were smart they would know that it isnt a rainbow, also known as a sign for homosexuality. And even if someone does think so, who cares, know what you are and thats all that really counts.

Well if there is a question on who's better between Nadal and Federer, well does that necessarily mean there could also be somewhat of a question on who is better between Sampras and Nadal? Or has there always been one and I'm just unaware haha.