Types of Matrices:
There are different types of matrices like rectangular matrix, null matrix, square matrix, diagonal matrix etc. This post covers overview of different types of matrices.
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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:
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.
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.
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: