**What is a matrix?**

A **matrix** is a rectangular array of elements or numbers. A matrix is usually enclosed in square or round brackets.

For example, **Matrix** of **dimensions** or **order** of **3 x 3** can be represented like:

**A=**

Follow this blog and be one step ahead.

by Jashan

**What is a matrix?**

A **matrix** is a rectangular array of elements or numbers. A matrix is usually enclosed in square or round brackets.

For example, **Matrix** of **dimensions** or **order** of **3 x 3** can be represented like:

**A=**

by Jashan

Values of Trigonometric ratios for 0, 30,45, 60 and 90 degrees

This post is regarding values of all trigonometric ratios for 0, 30, 45, 60 and 90 degrees. You should memorize all of them as they are used very often. There is technique to remember all of them. Just read the file carefully.

by Jashan

Some Important Notes of Trigonometry.

You learnt in the last post under the trigonometry section about sin, cos, tan, sec, cosec and cot. Continued from the last post under the section trigonometry, there are some important notes about trigonometry. Have a look at them and learn some identities and their proofs.

by Jashan

How to get Area of Triangle when two sides and angle between them are given

We are given two sides of triangle and angle between these two sides. We have to use a little bit of trigonometry in order to calculate its area. Look at the procedure in picture given below:

by Jashan

**How to get Area of Triangle when all the three sides are given?**

In this case, we need to calculate semi-perimeter (S) first using formula (a+b+c)/2 where a,b and c are lengths of three sides of triangle. Then we use heron's or hero's formula to calculate its area. Following is the complete procedure to calculate its area.