What it can do
Add, subtract, multiply and divide with proper order of operations, powers with ^, square roots, factorials, percentages, sine, cosine and tangent and their inverses, natural and base-10 logarithms, and the constants π and e. Ans uses your last answer.
Keyboard
Type calculations directly, such as 2^10, sqrt(2)*3 or sin(30). Press Enter for the answer and Escape to clear. Multiplication can be implied, so 2(3+4) and 2pi work too.
Degrees or radians
Switch with DEG and RAD. School problems usually use degrees; calculus and physics often use radians.