Trig Values

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Define the sine function in terms of a right triangle.

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In a right triangle, the sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse.

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Define the cosine function in terms of a right triangle.

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In a right triangle, the cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

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Define the tangent function in terms of a right triangle.

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In a right triangle, the tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

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What is the unit circle?

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The unit circle is a circle with a radius of 1 centered at the origin of a coordinate plane, used to define trigonometric functions.

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