Arccosine : The inverse trigonometric function that gives the angle whose cosine is a given number.
Arcsine : The inverse trigonometric function that gives the angle whose sine is a given number.
Arctangent : The inverse trigonometric function that gives the angle whose tangent is a given number.
Cosecant : The reciprocal of the sine function; for an angle in a right triangle, it represents the ratio of the hypotenuse to the opposite side.
Cosine : A trigonometric function representing the ratio of the adjacent side of a right triangle to the hypotenuse.
Cotangent : The reciprocal of the tangent function; for an angle in a right triangle, it represents the ratio of the adjacent side to the opposite side.
Secant : The reciprocal of the cosine function; for an angle in a right triangle, it represents the ratio of the hypotenuse to the adjacent side.
Sine : A trigonometric function representing the ratio of the opposite side of a right triangle to the hypotenuse.
Tangent : A trigonometric function representing the ratio of the opposite side to the adjacent side in a right triangle.