👉 In the context of mathematics and physics, "sextan" is a mathematical function that represents the inverse tangent function. The inverse trigonometric function is defined as the reciprocal of the tangent function. The definition for the inverse tangent (also known as arctangent) involves finding an angle whose sine is equal to its tangent: tan(a) = sin(a) And since we know that the sine and tangent functions are inverses of each other, we can calculate the angle whose sine is