Study Guide: Basic Trig Functions of Acute and Quadrantal Angles

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Define the sine function for acute angles.

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The sine function, denoted as sin(θ), is the ratio of the length of the opposite side to the hypotenuse in a right triangle.

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Define the cosine function for acute angles.

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The cosine function, denoted as cos(θ), is the ratio of the length of the adjacent side to the hypotenuse in a right triangle.

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What is the range of the sine function?

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The range of the sine function is from -1 to 1.

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What is the range of the cosine function?

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The range of the cosine function is from -1 to 1.

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