The Scientific Calculator is an advanced online mathematical tool designed to evaluate complex arithmetic, trigonometric, logarithmic, exponential, and algebraic expressions with scientific precision.

The Scientific Calculator parses mathematical expressions in real time using the standard order of operations (PEMDAS/BODMAS), processing functions like sines, cosines, logarithms, powers, and roots instantaneously.

Click on-screen keypad buttons or use your physical keyboard to type expressions. Toggle between Degree (DEG) and Radian (RAD) mode for trigonometric functions, press "=" or Enter to calculate, "C" or Escape to clear, and "Back" or Backspace to delete.

The calculator follows strict operator precedence (PEMDAS / BODMAS): Parentheses, Exponents/Functions, Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right). Formula: Evaluates mathematical expressions using IEEE 754 double-precision arithmetic.

Here is a practical example: Input "sin(30)" in DEG mode yields 0.5. Input "5 + 3 * 2" yields 11 (performing multiplication before addition).

The calculator supports arithmetic operators (+, -, *, /), trigonometric functions (sin, cos, tan, asin, acos, atan), logarithms (log10, ln), exponents (x^y, e^x, sqrt), factorials (n!), and mathematical constants (π and e).

Degree mode measures angles based on 360 degrees in a full circle (standard for geometry and navigation). Radian mode measures angles based on radius arc length where 2π radians equal 360 degrees (standard for calculus and physics).

The calculator utilizes 64-bit double-precision floating-point math, delivering accurate calculations up to 15 significant digits for scientific, engineering, and academic applications.