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Trigonometric Ratios

Author:
Godfrey Sovis
Topic:
Ratios
This is the Unit circle. Segment OP make an angle α with x-axis. Move the point P along the circumference of the unit circle. x-coordinate of P can be defined as Sinα and y-coordinate of P can be defined as Cosα. Observe how their values change when P is moved around the circle.

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