This applet shows how the graphs of sin (θ) and cos (θ) follow directly from the definition of these functions. Move the slider to change the angle. Observe that after the point moves once around the ...

As the point P moves anticlockwise around the circle from 0°, the angle θ changes. The values of cos θ and sin θ also change. The graphs of y = sin θ and y = cos θ can be plotted.

Integral Equations and Operator Theory (2020). [5] Control, Observation and Identification Problems for the Wave Equation on Metric Graphs. IFAC-PapersOnLine (2019).