 # Free Online Scientific Calculators

## Online Scientific Calculators

### How to use this scientific calculator

Scientific Calculator a free and easy-to-use scientific calculator that supports many advanced features, including unit conversion, equation solving, and surprisingly complex-number math. Free online calculator is presented as both a free online scientific calculator

### Basic Functions

The addition (sum function) is used by clicking on the "+" button or using the keyboard. The function results in a+b.

#### Subtraction

The subtraction (minus function) is used by clicking on the "-" button or using the keyboard. The function results in a-b.

#### Multiplication

The multiplication (times function) is used by clicking on the "x" button or using the keyboard "*" key. The function results in a*b.

#### Division

The division (divide function) is used by clicking on the "/" button or using the keyboard "/" key. The function results in a/b.

#### Sign

The sign key (negative key) is used by clicking on the "(-)" button. The function results in -1*x.

#### Square

The square function is used by clicking on the "x^2" button or type "^2". The function results in x*x.

#### Square Root

The square root function is used by clicking on the "x" button or type "sqrt()". This function represents x^.5 where the result squared is equal to x.

#### Sine

The Sine (SIN) function is used by clicking on the "SIN" button or type "SIN()". The result is the ratio of the length of the opposite side to the length of the hypotenuse of a right triangle.

#### Inverse Sine

The Inverse Sine (ASIN or ARCSIN) function is used by clicking on the "ASIN" button or type "ASIN()". The result is valid only from -pi/2 to pi/2.

#### Cosine

The Cosine (COS) function is used by clicking on the "COS" button or type "COS()". The result is the ratio of the length of the adjacent side to the length of the hypotenuse of a right triangle.

#### Inverse Cosine

The inverse cosine (ACOS or ARCCOS) function is used by clicking on the "ACOS" button or type "ACOS()". The result is valid only from 0 to pi.

#### Tangent

The Tangent (TAN) function is used by clicking on the "TAN" button or type "TAN()". The result is the ratio of the length of the opposite side to the length of the adjacent side of a right triangle.

#### Inverse Tangent

The inverse tangent (ATAN or ARCTAN) function is used by clicking on the "ATAN" button or type "ATAN()". The result is valid only from -pi/2 to pi/2.

#### Cosecant

The cosecant (CSC) function is used by typing "CSC()". The cosecant is the multiplicative inverse of the sine function.

#### Inverse Cosecant

The inverse cosecant (ACSC) function is used by typing "ACSC()". The result is only valid from -pi/2 to pi/2 excluding 0.

#### Secant

The secant (SEC) function is used by typing "SEC()". The secant is the multiplicative inverse of the cosine function.

#### Inverse Secant

The inverse secant (ASEC) function is used by typing "ASEC()". The result is only valid from 0 to pi excluding pi/2.

#### Cotangent

The cotangent (COT) function is used by typing "COT()". The cotangent is the multiplicative inverse of the tangent function.

#### Inverse Cotangent

The Inverse Cotangent (ACOT) function is used by typing "ACOT()". The result is only valid from 0 to pi.