Скачать или смотреть The unit circle is a circle with a radius of 1, centered at the origin of the coordinate plane.

The unit circle is a circle with a radius of 1, centered at the origin of the coordinate plane. It’s a fundamental concept in trigonometry because it provides a simple way to understand angles and their corresponding sine and cosine values. Every point on the unit circle has coordinates (cos(θ), sin(θ)), where θ is the angle formed with the positive x-axis. As θ changes, the point moves around the circle, tracing out the values of the trigonometric functions. This makes the unit circle a powerful tool for visualizing how sine and cosine behave, especially when dealing with angles beyond 90° or negative angles.

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