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# Geometry Ch7

TermDefinition
Pythagorean triple A set of three positive integers a, b, and c that satisfy the equation c2=a2+b2.
Trigonometric ratio A ratio of the lengths of two sides in a right triangle.
Tangent A trigonometric ratio, abbreviated as tan. For a right triangle ABC, the tangent of the acute angle A is tan A = length of leg opposite <A over length of leg adjacent to <A = BC over AC.
Sine A trigonometric ratio, abbreviated as sin. For a right triangle ABC, the sine of the acute angle A is
Cosine The trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
Angle of elevation When you look up at an object, the angle that your line of sight makes with a line drawn horizontally.
Angle of depression When you look down at an object, the angle that your line of sight makes with a line drawn horizontally
Solve a right triangle To find the measures of all of the sides and angles of a right triangle.
Inverse tangent An inverse trigonometric ratio, abbreviated as tan -1. For acute angle A, if tan A=x, then tan -1 x = m<A.
Inverse sine An inverse trigonometric ratio, abbreviated as sin -1. For acute angle A, if sin A=y, then sin -1 = m<A.
Inverse cosine An inverse trigonometric ratio, abbreviated as cos -1. For acute angle A, if cos A=z, then cos -1 = m<A.
Created by: Dludden03