Scientific Calculator: Trig in Degrees or Radians, log and ln

2.5

Angle mode: degrees, so sin(30) is for 30°. log is base 10; ln is the natural log.

Type in the box or press the keys. Enter calculates.

Your calculations will appear here

The Scientific Calculator is a full-featured calculator that works just like a physical scientific calculator. It supports basic arithmetic, trigonometric functions, logarithms, exponents, roots, factorials, and memory operations.

Use the button grid or type expressions directly, such as sin(30) + log(100). The angle mode is shown above the keys: switch between degrees and radians for trigonometric calculations. log is base 10 and ln is the natural log. The calculator maintains a history of your recent calculations.

In degree mode sin(30) is 0.5 and log(100) is 2, so sin(30) + log(100) = 2.5. The same keys in radian mode read 30 as radians and give 1.012, so check the angle mode before you trust a trig answer.

How to Use the Scientific Calculator

Click buttons or type to enter mathematical expressions.
Use the function buttons (sin, cos, tan, log, ln, sqrt) for advanced operations.
Toggle between degrees and radians mode for trigonometric functions.

Formula and Theory

A scientific calculator extends basic arithmetic with functions commonly used in science, engineering, and mathematics. These include trigonometric functions, logarithms, exponents, roots, factorials, and constants like pi and e.

Trigonometric functions can operate in degrees or radians. Degrees divide a full circle into 360 parts; radians use the ratio of arc length to radius, with a full circle being 2*pi radians.

Worked Examples

Example 1: Trigonometric calculation

Problem: Find sin(30 degrees)

Solution: Ensure calculator is in DEG mode. Press sin, enter 30

Answer: 0.5

Example 2: Logarithm

Problem: Find log(1000)

Solution: Press log, enter 1000

Answer: 3

Frequently Asked Questions

How do I switch between degrees and radians?

Click the DEG/RAD button to toggle between degree mode and radian mode. The current mode is displayed on screen.

What is the difference between log and ln?

log is the common logarithm (base 10). ln is the natural logarithm (base e = 2.71828...). ln is more common in calculus and science.

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