In mathematics, the inverse trigonometric functions (occasionally also called antitrigonometric, [1] cyclometric, [2] or arcus functions [3]) are the inverse functions of the trigonometric functions, under suitably restricted domains.

在 数学 中， 反三角函数 （英語： inverse trigonometric function）是 三角函数 的 反函数。 符号 等常用于 等。 但是这种符号有时在 和 之间易造成混淆。 在编程中，函数 , , 通常叫做 , , 。 很多编程语言提供两自变量 atan2 函数，它计算给定 和 的 的反正切，但是值域为 。 在笛卡尔平面上 (紅)和 (綠)函数的常用主值的图像。 下表列出基本的反三角函数。 如果 允许是 复数，则 的值域只适用它的实部。 余角： 负数参数： {\displaystyle \operatorname {arccot} (-x)=\pi …

ASIN function Description. Arcsine function. ASIN(x) returns the arcsine of x. The arcsine function is the inverse function of the sine function and calculates the angle for a given sine. X must be in the range [-1..1]. The result is an angle expressed in radians. To convert from radians to degrees, use the DEGREES function.

Sine, Cosine and Tangent are all based on a Right-Angled Triangle. They are very similar functions ... so we will look at the Sine Function and then Inverse Sine to learn what it is all about. The Sine of angle θ is: Or more simply: Example: What is the sine of 35°? = 0.57... The Sine Function can help us solve things like this:

Arc Sine (asin) is the inverse function of sine (sin), which means that a==sin(asin(a)) for every value of a that is within asin()'s range. This is an online free asin calculator. You can calculate value of asin() trignometric function easily using this tool.

Y = asin(X) returns the Inverse Sine (sin -1) of the elements of X in radians. The function accepts both real and complex inputs. For real values of X in the interval [-1, 1], asin(X) returns values in the interval [-π/2, π/2]. For real values of X outside the interval [-1, 1] and for complex values of X, asin(X) returns complex values.

2024年6月10日 · The Asin function returns the arcsine, or inverse sine, of its argument. The arcsine is the angle whose sine is the argument. The returned angle is given in radians in the range -π/2 to π/2. The Atan function returns the arctangent, or inverse tangent, of its argument. The arctangent is the angle whose tangent is the argument.

2022年1月15日 · In computer programming languages, the inverse trigonometric functions are often called by the abbreviated forms asin, acos, atan. The notations sin −1 (x), cos −1 (x), tan −1 (x), etc., as introduced by John Herschel in 1813, are often used as well in English-language sources—conventions consistent with the notation of an inverse function.

TRIGONOMETRIC FUNCTIONS. The tangent tan. The cofunctions of the sine, cosine, and tangent (cosec/csc and cotan/cot are aliases) csc, cosec, sec, sec, cot, cotan. The arcus (also known as the inverse) functions of the sine, cosine, and tangent asin, acos, atan. The principal value of the arc tangent of y/x atan2(y, x)

The Asin() function returns the arcsine of a given unitless number. The result is given in radians, but it can be converted to degrees using "to deg". Asin() also works with complex numbers. Examples of trig arc functions. Acos(pi/4) = .667 rad; Acos(0.5) to deg = 60 deg; Atan(3ft/5ft) = 0.540 rad; Asin(-1 + 2i) = (-0.427 + 1.529 i) rad