fourth grade multiplication

Let A be a matrix of order mxn. Let B be a matrix of order nxp. Then the product of the matrices A and B is of order mxp. i.e., when we multiply two matrices the number of columns of the first matrix should be equal to the number of rows of the second matrix. Two matrices can be multiplied by usin..

The transfer of blood from one person to another is called blood transfusion. In all cases of blood transfusion, it is necessary to match the blood group of the recipient with the blood group of donor. The following table represents the blood group matchin..

Two matrices A and B can be multiplied if the number of columns of A is equal to the number of rows of B. The resultant matrix will be of the order of (number of rows of A x number of columns of B). If A be a matrix of the order m x n and B be a matrix of the order n x q, then A and B c..

Coulomb's law describes only the interaction of two point charges. Experiments show that when two charges exert forces simultaneously on a third charge, the total force acting on that charge is the vector sum of the forces that the two charges would exert individually. This important property..

When an object is kept between two plane mirrors inclined at an angle q , more than one image forms. The total number of images formed in such a case can be related to the angle as follows :..

Solved Example Multiplying the fractions ½ and 2/5 Solution : ½ x 2/5 = 1 x 2 / 2 x 5 = 2/10 = 1/5 (After simplificatio..

Trigonometric Ratios of Multiple and Sub-multiple Angles are: 1. Sin2A = 2SinACosA 2. Cos2A = Cos 2 A-Sin 2 ..

The following results have already been derived under Circular functio..

Which of the following is a multiple of 24? => 168 or 112 or 196 or 154..

Which number is a multiple of 10? => 5 or 25 or 1 or 20..