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trigonometric function

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Functions defined in terms of a right-angled triangle (see diagram) and widely used in the solution of many mathematical problems. They are defined as: tangent of angle A, written tanA = a/b sine of angle A, written sinA = a/c cosine of angle A, written cosA = b/c,

tangent of angle A, written tanA = a/b

sine of angle A, written sinA = a/c

cosine of angle A, written cosA = b/c,

where a is the length of the side opposite the angle A, b is the length of the side opposite the angle B, and c is the hypotenuse of the triangle. The reciprocal functions are: cotangent of angle A, written cotA = 1/tanA = b/a secant of angle A, written secA = 1/cosA = c/b cosecant of angle A, written cosecA = 1/sinA = c/a

cotangent of angle A, written cotA = 1/tanA = b/a

secant of angle A, written secA = 1/cosA = c/b

cosecant of angle A, written cosecA = 1/sinA = c/a

Trigonometric functions.

Subjects: Mathematics.

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