Algebra 2 Topic 7 Vocabulary (copy)

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Last updated 7:40 PM on 9/18/26
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15 Terms

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cofunction

the trigonometric function of the complement of an angle

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cosecant

ratio of the hypotenuse to the opposite side of a right-angled triangle

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cosine

ratio of the adjacent side to the hypotenuse of a right-angled triangle

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cotangent

ratio of the adjacent to the opposite side of a right-angled triangle

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secant

ratio of the hypotenuse to the adjacent side of a right-angled triangle

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sine

ratio of the opposite side to the hypotenuse of a right-angled triangle

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tangent

ratio of the opposite to the adjacent side of a right-angled triangle

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coterminal angles

angles in standard position with the same terminal side

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initial side

the ray on the x-axis

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radian

the measure of a central angle that intercepts an arc equal in length to the radius of the circle

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radian measure

length of arc/length of radius

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reference angle

the acute angle formed by the terminal side of an angle in standard position and the x-axis

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standard position

an angle with its vertex at the origin and its initial side along the positive x-axis

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terminal side

a ray of an angle that rotates about the center

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unit circle

a circle whose center is at the origin and has a radius of one