Geometry Length Units Before Area or Volume
Convert every edge into one unit before you type. Area and volume scale by the square or the cube.
Matrix Input Order and Why the Product Changes
Enter rows left to right. AB is not BA, and a column-wise paste is the transpose.
Degrees Versus Radians Before You Type an Angle
Sine of 30 degrees is one half. The same digits in radian mode are a different angle.
Using an Algebra Calculator Without Skipping the Setup
Write and define the equation first. Substitute the solver's root back into the original statement.