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单词 trignometric functions
释义 trignometric functions
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,

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

Trigonometric functions
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更新时间:2025/6/23 11:41:25