Solution of task 7.5.8 from the collection of Kepe OE

Solution of task 7.5.8 from the collection of Kepe OE

7.5.8
The law of motion of a point in a rectangular coordinate system is given: x = 3cos t, y = 3sin t. Determine the time when the curvilinear coordinate of the point s = 7 m, if for t0 = 0 s0 = 0. The point moves in the positive direction of the coordinate s. (Answer 2.33)