This visual shows the unit circle and how the sine of theta changes as the angle increases. The sine of theta is the y-coordinate on the circle. Since the unit circle has a radius of 1, the hypotenuse of the triangle is 1. As we move along the circle from (1,0), the x and y coordinates change, and the y-coordinate is always the sine of theta. | The Brain Maze
0:44
This visual shows the unit circle and how the sine of theta changes as the angle increases. The sine of theta is the y-coordinate on the circle. Since the unit circle has a radius of 1, the hypotenuse of the triangle is 1. As we move along the circle from (1,0), the x and y coordinates change, and the y-coordinate is always the sine of theta. | The Brain Maze
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