|
geometric mean
|
the positive square root of the product of two numbers
|
|
trigonometric ratio
|
a ratio of two sides of a right triangle
|
|
angle of elevation
|
the angle formed by a horizontal line and a line of sight to a point above the line
|
|
angle of depression
|
the angle formed by a horizontal line and a line of sight to a point below the line
|
|
theorem 8-1-1
|
the altitude to the hypotenuse of a right triangle forms two triangles that are similar to each other and to the original triangle
|
|
the law of sines
|
for any triangle ABC with side lengths a, b, and c, sinA/a = sinB/b = sinC/c
|
|
the law of cosines
|
for any triangle ABC with side lengths a, b, and c, a2 = b2 + c2 -2bc cosA, b2 = a2 + c2 -2ac cosB, and c2 = a2 + b2 -2ab cosC
|
|
sine
|
the ratio of the length of the leg opposite the angle to the length of the hypotenuse
|
sin = opposite/hypotenuse
|
|
cosine
|
the ratio of the length of the leg adjacent to the angle to to the length of the hypotenuse
|
cos = adjacent/hypotenuse
|
|
tangent
|
the ratio of the length of the leg opposite the angle to the length of the leg adjacent to the angle
|
tan = apposite/adjacent
|
No comments yet.
Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
