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Mathematics 15 Online
OpenStudy (anonymous):

a weight is attached to a spring. the weight moves up and down periodically. the displacement, y, of the weight is modeled by this function, where t is the time in seconds. what is the displacement of the weight when t=6

OpenStudy (anonymous):

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A + B). can some help please thanks

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