Mathematics

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Trigonometric unit circle expanded.

Diagram showing the relationship between the unit circle and the sine function, with a right triangle representing the sine value of angle θ, plotted on a sine curve from 0 to 2π.

This illustration demonstrates the connection between the unit circle and the sine function, making it a valuable visual aid for high school trigonometry textbooks. The image shows how the sine of an angle corresponds to the y-coordinate of a point on the unit circle, plotted as a function of the angle θ.

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