Trigonometric expressions, identities, and equations

Front

What is the definition of sine (sin) in a right triangle?

Back

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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What is the definition of cosine (cos) in a right triangle?

Back

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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What is the definition of tangent (tan) in a right triangle?

Back

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the Pythagorean identity?

Back

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What is the reciprocal identity for sine?

Back

Front

What is the reciprocal identity for cosine?

Back

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What is the reciprocal identity for tangent?

Back

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