How do I switch between degrees and radians?

Use the DEG/RAD toggle. Trigonometric functions interpret the input angle in the active mode. Most textbook problems use DEG; calculus and physics often use RAD.

What is the difference between log and ln?

log is log base 10 (common logarithm). ln is the natural logarithm (log base e = 2.71828). ln appears in calculus and exponential growth. Log base 10 is used in pH, decibels, and the Richter scale.

How do I calculate a power like 3 to the 4th?

Use the x^y button: enter 3, press x^y, enter 4, press equals. Result is 81. For square root use sqrt. For nth root, use x^(1/n) — for cube root of 27: 27^(1/3) = 3.

Does the calculator support parentheses?

Yes. Use ( and ) to group operations. (3 + 4) times 5 = 35. Without parentheses, 3 + 4 times 5 = 23 because multiplication takes priority over addition.

Scientific Calculator — Trig, Log & Powers

How this tool fits your workflow

Scientific calculator functions and when to use them

A scientific calculator extends the four basic operations with functions needed for algebra, trigonometry, and calculus. Trig functions (sin, cos, tan) solve triangle problems and model periodic phenomena. Inverse trig functions (arcsin, arccos, arctan) find angles from ratios. The degrees vs radians toggle is critical: sin(90) in DEG = 1, but sin(90) in RAD = approximately 0.894.

Logarithms compress wide ranges of values. The Richter scale, decibels, pH, and information entropy all use log scales because the underlying phenomena span many orders of magnitude. Natural log (ln) appears whenever exponential growth or decay is modeled: population growth, radioactive decay, and continuous compound interest.

Order of operations and common mistakes

Order of operations (PEMDAS): Parentheses, Exponents, Multiplication/Division (left to right), Addition/Subtraction (left to right). A common mistake: entering 1/2x when intending 1/(2x). The calculator interprets 1/2x as (1/2)x = 0.5x. Use parentheses to make grouping explicit.

Another common error: computing sin(30) in RAD mode and expecting 0.5 (the answer in DEG mode), but getting approximately 0.988 instead. Always verify the mode before computing trigonometric values.

Frequently asked questions

How do I switch between degrees and radians?: Use the DEG/RAD toggle. Trigonometric functions interpret the input angle in the active mode. Most textbook problems use DEG; calculus and physics often use RAD.
What is the difference between log and ln?: log is log base 10 (common logarithm). ln is the natural logarithm (log base e = 2.71828). ln appears in calculus and exponential growth. Log base 10 is used in pH, decibels, and the Richter scale.
How do I calculate a power like 3 to the 4th?: Use the x^y button: enter 3, press x^y, enter 4, press equals. Result is 81. For square root use sqrt. For nth root, use x^(1/n) — for cube root of 27: 27^(1/3) = 3.
Does the calculator support parentheses?: Yes. Use ( and ) to group operations. (3 + 4) times 5 = 35. Without parentheses, 3 + 4 times 5 = 23 because multiplication takes priority over addition.