eksak

Eksak is an Indonesian adjective and noun used to denote precision or exactness in mathematics, science, and measurement. In everyday and academic language, eksak describes results, methods, or disciplines that are intended to be exact rather than approximate. The term appears in phrases such as ilmu eksakta (exact sciences), solusi eksak (exact solution), and nilai eksak (exact value).

In mathematics, eksak refers to results that can be expressed in closed form or written without approximation. For example, solving x^2 - 5x + 6 = 0 yields x = 2 and x = 3 as exact solutions, and trigonometric values such as tan(π/4) = 1 are exact. By contrast, many problems require numerical or approximate methods, producing solutions that are not exact.

In the educational and scientific context, eksakta denotes a group of disciplines that rely on precise reasoning, measurement, and formal modelling. In Indonesia, ilmu eksakta typically includes mathematics, physics, chemistry, astronomy, and computer science, often contrasted with social sciences or humanities. The label emphasizes the use of rigorous methods, experimental techniques, and exact calculations in theory and application.

Etymologically, eksak is a loanword from the word “exact” and is used in various Indonesian forms, sometimes appearing as eksak or eksakta depending on the construction (for example, ilmu eksakta, nilai eksak). The term also reflects a broader cultural distinction between exact sciences and other fields in education and research.