# How To Use The Advanced Functions Of A Calculator

**How To Use The Advanced Functions Of A Calculator Effectively**

The additional functions found on a scientific calculator include features which will enable the user to complete more complex Maths problems for either mathematical or scientific purposes. A majority of the buttons which are required for use in most GCSE calculator exams are listed below, alongside an explanation of what they do.

**Standard Form = E***x*p

Standard form refers to a method of writing a number which is either very large or very small. For example 12 000 000 can also be written as 1.2 x10 000 000. When written in standard form the number would be presented as 1.2 x 10^{7}. The small 7 refers to the amount of time the first number would have to be multiplied by ten in order to add up to the number being shown – in this case 12,000,000.

**sin****: Sine, cos: Cosine, tan: Tangent**

These are the trigonometry functions that determine the ratio of the three sides in a right angle. As shown below:

**Square root –****√****X**

The square root of a number is a number which when multiplied by itself gives a specified result. For example:

The square root of 64 is **8** as: 8 x 8 = 64

**Cube root****–**^{3}**√****X**

This is a number which has been cubed. A cubed number is the number which when it has been multiplied by itself twice gives a specified number. For example:

The cube root of 64 is **4** as: 4 x4 x 4 = 64

**a**^{b}/_{c }– Fractions

Fractions are a portion of another number. For example a quarter would be written as ^{1}/_{4}. The symbol on the calculator shown above allows users to input fractions into a scientific calculator.

**+/- Negative numbers**

To input a number into the calculator as a negative, pressing this button will change the input from positive to negative, or negative to positive depending on which way it was originally entered.