“trigonometric functions”的概念、定义、翻译、参考文献-科学参考

trigonometric functions

Physics

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:

$\begin{array}{l} tangent of angle A, written tan A = a / b \\ sine of angle A, written sin A = a / c \\ cosine of angle A, written cos A = b / c \end{array}$

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:

$\begin{array}{l} cotangent of angle A, written cot A = 1 / tan A = b / a \\ secant of angle A, written sec A = 1 / cos A = c / b \\ cosecant of angle A, written cosec A = 1 / sin A = c / a \end{array}$

Trigonometric functions.

Chemical Engineering

The representation of relationships between the sides and angles of a right-angled triangle, such that for an angle θ:
- sine θ = opposite side/hypotenuse
- cosine θ = adjacent side/hypotenuse
- tangent θ = opposite side/adjacent side
- secant θ = hypotenuse/adjacent side
- cosecant θ = hypotenuse/opposite side

Electronics and Electrical Engineering

Mathematical functions that relate an angle to the lengths of the sides of right-angled triangles in which it occurs. The two most common are the sine function, sin (θ), and cosine function, cos (θ), as shown in the diagram. The other four can be obtained as reciprocals or ratios of these two. Trigonometric functions have a wide range of uses in electronics, notably for dealing with AC waveforms and signal frequency analysis. See also inverse trigonometric functions.
Trigonometric functions

单词	trigonometric functions
释义	trigonometric functions Physics 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: $\begin{array}{l} tangent of angle A, written tan A = a / b \\ sine of angle A, written sin A = a / c \\ cosine of angle A, written cos A = b / c \end{array}$ 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: $\begin{array}{l} cotangent of angle A, written cot A = 1 / tan A = b / a \\ secant of angle A, written sec A = 1 / cos A = c / b \\ cosecant of angle A, written cosec A = 1 / sin A = c / a \end{array}$ Trigonometric functions. Chemical Engineering The representation of relationships between the sides and angles of a right-angled triangle, such that for an angle θ: sine θ = opposite side/hypotenuse cosine θ = adjacent side/hypotenuse tangent θ = opposite side/adjacent side secant θ = hypotenuse/adjacent side cosecant θ = hypotenuse/opposite side Electronics and Electrical Engineering Mathematical functions that relate an angle to the lengths of the sides of right-angled triangles in which it occurs. The two most common are the sine function, sin (θ), and cosine function, cos (θ), as shown in the diagram. The other four can be obtained as reciprocals or ratios of these two. Trigonometric functions have a wide range of uses in electronics, notably for dealing with AC waveforms and signal frequency analysis. See also inverse trigonometric functions. Trigonometric functions
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