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=$$\left[ … [Continue reading]

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

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 … [Continue reading]

## Relation between (sin cos), (sec tan) and (cosec cot)

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 … [Continue reading]

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

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 … [Continue reading]

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

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 … [Continue reading]