MSMuhammad Shahid

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Scientific calculator

An online scientific calculator with trigonometry, logarithms, powers, roots and factorials, in degrees or radians.

 

Type freely too, for example sqrt(2)^2 + sin(30). log is base 10 and ln is base e. Implied multiplication works: 2pi, 3(4+1).

Quick answer

Use the keypad or type an expression such as sqrt(2)^2 + sin(30). It supports sin, cos and tan and their inverses, log (base 10), ln (base e), roots, powers, factorials, π and e. Switch between degrees and radians above the display. Exact angles give exact answers: sin(180°) is 0, and tan(90°) is reported as undefined.

How to use it

  1. Choose degrees or radians. Most school problems use degrees; calculus and programming use radians.
  2. Enter the expression. Use the keypad or type it. A closing bracket at the very end is optional.
  3. Press = or Enter. Use Ans in the next calculation to reuse the result.

Example

In degrees mode:

Input

sin(30)
log(1000)
5!
sqrt(144) + 2^3

Output

0.5
3
120
20

Common errors and how to fix them

My trig answer looks wrong
Check the angle unit. sin(30) is 0.5 in degrees but about -0.988 in radians.
Tangent is undefined at this angle
tan(90°) has no value because the cosine there is 0, and the same goes for 270° and so on.
This power has no real answer
A negative number raised to a fraction, such as (-8)^0.5, is not a real number.

Frequently asked questions

Should I use degrees or radians?

Use degrees if angles are given in degrees, as in most geometry. Use radians for calculus or when angles involve π. A wrong setting is the most common cause of wrong trig answers.

What is the difference between log and ln?

log is base 10, so log(1000) is 3. ln is base e (about 2.718), so ln(e) is 1.

How do I enter a power?

Use ^, as in 2^10. Powers run right to left, so 2^3^2 is 2^9, or 512.

Why is -2^2 equal to -4?

Powers come before the minus sign, as is standard in mathematics. Write (-2)^2 to get 4.

What does n! mean?

The factorial: the product of all whole numbers up to n, so 5! is 120. It works up to 170!, above which the number is too large to show.

How do I find an inverse sine?

Use asin, also written sin⁻¹. In degrees mode, asin(0.5) is 30. The input must be between -1 and 1.

Can it multiply without a × sign?

Yes. 2pi, 3(4+1) and (2)(3) all work.

Can I use it in an exam?

Check your exam rules, as most exams allow only approved physical calculators. It is well suited to homework and practice.

How do I calculate a square or a cube root?

Use x² or ^2 for a square, √ for a square root, and type cbrt(27) for a cube root, which gives 3.

What does Ans do?

Ans holds your last result, so sin(30) and then Ans × 4 gives 2. For everyday sums, the basic calculator has a simpler layout.

Sources

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By Muhammad Shahid. Last updated .