General Calculators
Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, powers, factorials, DEG/RAD mode and safe expression evaluation.
Calculator
Enter your values and calculate.
Result
Results appear here.
Formula
Trigonometry uses the angle mode you select. In DEG, sin(30) is 1/2. In RAD, 30 means 30 radians, not 30 degrees.
sin(30°) + √16 = 0.5 + 4 = 4.5
A factorial is 1 × 2 × … × n. 5! = 120. The parser accepts + − × ÷, parentheses, sin, cos, tan, log, ln, sqrt, ^ and pi. It does not run programming code.
Solved example (Class 10, degrees)
Expression: sin(30)+sqrt(16). Angle mode: DEG.
sin(30°) = 0.5. √16 = 4.
Result = 4.5.
The same keystrokes in RAD are a different question, because 30 radians is not a 30° angle on a Pakistani board paper.
Frequently asked questions
Should I use DEG or RAD for Matric trigonometry?
Board questions that say 30°, 45° or 60° use degrees. Leave the mode on DEG. Switch to RAD only when the question writes the angle in radians, such as π/6.
Why is sin(30)+sqrt(16) equal to 4.5?
In degree mode sin(30) is 0.5 and the square root of 16 is 4. Adding them gives 4.5. If the mode is RAD, sin(30) is not 0.5.
Does this page run the expression in my browser with JavaScript eval?
No. The expression is sent to a fixed parser that only allows math functions. A string such as exec() is rejected.
Can I use this for a physics numerical that mixes degrees and powers?
Yes, when the whole expression stays in one angle mode. Convert any radian angle yourself before mixing it with a degree term.