Voltages are applied to the horizontally and vertically deflecting plates of the oscilloscope: Ux=20cospt, V; Uy=10cos(pt f), B. The sensitivity of the plates is the same and equal to 1 mm/V. Write the equation of the trajectory along which the point moves from the electron beam on the oscilloscope screen, for two cases: a) f=0, b) f=n/2.

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