Make a carefully labeled sketch for each of the following functions.
(a) Sketch cosθ for values ofθ in the range 0 θ<6π.
(b) Sketch cos(0.2πt) for values oft such that three periods of the function are shown.
(c) Sketch cos (2πt/To) for values of t such that three periods of the function are shown. Label the horizontal axis in terms of the parameter To.
(d) Sketch cos (2πt/To +π/2) for values of t such that three periods of the function are shown.
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