Advanced Scientific Calculator
A full scientific keypad with trig, logs, powers, and roots. Every result you calculate is saved to your history automatically.
Order of operations, still the most common error source
Standard order — parentheses, exponents, multiplication/division, then addition/subtraction — applies here exactly as it does on paper. Entering an expression in a different order than intended is by far the most common source of an unexpected result, not a calculator bug.
Degrees vs. radians
Trigonometric functions give completely different results depending on whether the input is treated as degrees or radians. If a sine or cosine result looks unexpected, check the angle mode before assuming the calculation itself is wrong.