Question 1

How do I calculate sin, cos, tan?

Accepted Answer

Press the sin, cos, or tan button after entering your angle value. By default the calculator uses degrees. Toggle to RAD mode at the top for radians. For example, sin(30) in degree mode returns 0.5.

Question 2

How do I calculate square root?

Accepted Answer

Press √ button then enter the number, or enter the number first then press √. For example √144 = 12. For cube root, use the ∛ button or raise to power 1/3.

Question 3

What does the e button do?

Accepted Answer

The e button inserts Euler's number (2.71828...), the base of natural logarithms. It is used in exponential growth calculations. eˣ calculates e raised to the power x.

Question 4

What is the difference between log and ln?

Accepted Answer

log calculates base-10 logarithm. For example log(100) = 2. ln calculates natural logarithm (base e). For example ln(e) = 1. Both are commonly used in science and engineering.

Question 5

How do I calculate factorial?

Accepted Answer

Enter a positive integer then press the n! button. For example 5! = 120 (5 × 4 × 3 × 2 × 1). Factorial only works for non-negative integers up to 170 (beyond that the result is too large).

Question 6

Can I use this on my phone?

Accepted Answer

Yes. The calculator is fully responsive and works on any device including smartphones and tablets. The layout adapts to your screen size. The buttons are touch-friendly.