It seems that it is impossible to put on a plot a text wich would include Greek letters, for instance sin(alpha), where "alpha" is a Greek alpha. For instance, demonstarting a solution of the pendulum problem I would like to show the angle alpha by which the pendulum is offset from equilibrum and the component of the gravitational force which pushes it back to equilibrium - m g sin(alpha). Andrzej Pindor University of Toronto

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