What is a scientific calculator?
A scientific calculator handles arithmetic, powers, roots, trigonometry, logarithms, factorials, constants, brackets, and scientific notation in one expression.
Why DEG and RAD matter
Trigonometric functions depend on the angle unit. School geometry often uses degrees, while calculus and physics often use radians. Switching the mode changes how sin, cos, tan, and inverse trig functions behave.
Calculator keyboard shortcuts
You can type expressions directly with the keyboard. Use Enter to calculate, Backspace to delete, Escape to clear, and the first letters of common functions for faster entry.