Overview
A scientific calculator extends basic arithmetic with powers, roots, logs, and trigonometry. Start with clear parentheses and know whether you are in degrees or radians.
Know your angle mode
Trig functions behave differently in degrees vs radians. Match the mode to your textbook or exam settings.
Respect order of operations
Parentheses make intent clear for powers, roots, and chained functions.
Check with a simple case
Verify sin(30°) = 0.5 in degree mode before trusting a longer expression.
Try the calculator
Use the free Scientific Calculator for live numbers, then come back to this guide anytime you need a quick refresher.