How do I plot a voltage against time?

I´ve got two voltages that I want to plot in a interval of 10s:

170cos(2t-90.16°) mV

75cos(4t+131.67°) mV

Any help will be apreciated.

[Walter Roberson]

Is this different than https://www.mathworks.com/matlabcentral/answers/417336-how-do-i-plot-voltage-and-currents-against-time

[Damián Muciño]

In this question I am trying to plot olny the voltages and not the currents.