# What is the inverse of a fraction called

**The**

**inverse**

**of**

**a**Matrix. Suppose that we have a square matrix

**A**, whose determinant is not equal to zero, then there exists an m×n matrix A-1 that is

**called**

**the**

**inverse**

**of**

**A**such that: AA-1 = A-1 A =

**I**, where

**I**

**is**

**the**identity matrix. It is easy to find the

**inverse**

**of**

**a**2×2 matrix in comparison to 3×3 or 4×4 matrix.

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**inv**(A)*b is inferior to solving it directly using the backslash operator, x = A\b.. Create a random matrix A of order 500 that is constructed so that its condition number, cond(A), is 1e10, and its norm, norm(A), is 1.The exact solution x is a random vector of length 500, and the right side is b = A*x. To calculate the

**inverse**

**of**tan in Python, we use math.atan () function. The

**inverse**

**of**tan or tangent is also

**called**arctan or arc tangent. A theoretical detail can be found on Wikipedia. "Arctan of x can be defined as the

**inverse**

**of**

**the**tangent function of x where x is a real number (x∈ℝ).". It is an angle between −π/2 and +π/2.

**The**answer is 120°. With

**inverse**secant, we select the angle on the top half of the unit circle . Thus sec -1 (-2) = 120° or sec -1 (-2) = 2π/3. In other words, the range of sec -1 is restricted to [0, 90°) U (90°, 180°] or . Note: sec 90° is undefined, so 90° is not in the range of sec -1.

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**inverse**tangent here ) Decimal. Opposite / Adjacent.

**Inverse**tangent:. Addition Property of EqualityIf

**a**= b, then a + c= b + c. Additive

**Inverse**. For any number x, there exists a number −x, such that x + −x= 0. Adjacent Angle. Two angles that share a common vertex and a common side. Altitude of a Triangle. A segment drawn from a vertex of the triangle perpendicular to the opposite side of the triangle,

**called**.

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**inverse**function. Exponents are not commutative; 2 8 ≠ 8 2. So we need two different

**inverse**functions. Given b e = r, we have the " n th root" operation, b = r e. It turns out that this can actually be.