Tutorial Basic Formulas and Results of Vectors

Basic Formulas and Results of Vectors


1) If then magnitude or length or norm or absolute value of is

2) A vector of unit magnitude is unit vector. If is a vector then unit vector of is denoted by and

3) Important unit vectors are , where

4) The components of unit vectors of are called the direction cosines of , denoted by and

5) If, then are called directional angles of the vectors and

6) If and are the two points, then

7) If and then

8) If and is a scalar number, then.

9) In vector addition
IV. , is the additive identity in vector addition.
V. , is the inverse in vector addition.

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