Trig functions
Use sin, cos, and tan in degrees or radians. The examples make the current angle mode visible so you do not mix units by accident.
A fast school-friendly scientific calculator for trig, logs, exponents, roots, constants, and everyday homework checks.
Mathcheck
MC-01 / Classic Mode
Angle mode
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Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
+ − × ÷ to build an expression. Press = to evaluate.( and ) to control order of operations.^ for any power (e.g. 2^10 = 1024), or x² for square.sin(30) = 0.5.log is base 10; ln is natural log.π for pi, e for Euler's number.The parser follows PEMDAS: Parentheses, Exponents, Multiplication and Division (left to right), then Addition and Subtraction (left to right). Exponentiation is right-associative, so 2^3^2 is 2^(3^2) = 512.
Use sin, cos, and tan in degrees or radians. The examples make the current angle mode visible so you do not mix units by accident.
Use log for base 10, ln for natural log, pi for circle work, and e for exponential growth or decay problems.
Evaluate squares, any exponent, square roots, and nested expressions while preserving order of operations.
Keep a short history tape, copy the latest result, and use common examples before typing a longer expression.
A scientific calculator evaluates expressions, trig functions, logs, exponents, roots, and constants. A graphing calculator adds coordinate plots, function graphs, and visual intersections. For quick school calculations, this page should be enough; for graph-heavy work, pair it with topic tools like slope or quadratic formula.
It can use either. Choose Degrees for most high-school trig problems that use degree symbols, or Radians for calculus, unit-circle, and many physics formulas.
log means base 10. Use ln for the natural logarithm, which has base e.
The most common causes are division by zero, an unfinished parenthesis, or a real-number operation such as sqrt(-1), log(0), or log of a negative number.
No. This page is built for fast scientific calculations. Use the related algebra calculators when you need worked steps for slope, quadratics, exponents, logs, or other specific topics.