How to Use the Scientific Calculator
Tap out an expression using the keypad — including parentheses, exponents, and functions like sin, cos, log, and sqrt — then press equals to evaluate it using standard order of operations; use the DEG/RAD button to switch trigonometric mode before evaluating an expression involving sin, cos, or tan.
The calculator is built to handle full expressions, not just single operations, so it's worth understanding how it reads what you type.
Building an expression
As covered in the order-of-operations guide, the calculator evaluates whatever expression you enter using standard PEMDAS rules, so you can chain multiple operations and parentheses in one entry rather than evaluating step by step manually.
Checking degree vs. radian mode before trig functions
As covered in the degrees-vs-radians guide, always check the DEG/RAD indicator before entering a sin, cos, or tan calculation, since the same numeric angle produces a completely different result depending on which mode is active.