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Coordinates of a moving point are given by x =a (2t + sin 2t), y = a (1-cos 2 t) ; Prove that its accn. is constant.Find direction at time t? What is the probability that Prince Harry & Megan Markle babies will be born black? Math homework help? Christina has $103 earned from babysitting saved at home...? Is Sir Walter Tyrell a cousin to Queen Elizabeth? What are the benefit of education?