**Addition of vectors**

**Parallelogram law of vector addition**

According to the parallelogram law of vector addition:

“If two vector quantities are represented by two adjacent sides or a parallelogram then the diagonal of parallelogram will be equal to the resultant of these two vectors.”

**Explanation**

Consider two vectors and .

Let the vectors have the following orientation

parallelogram of these vectors is :

According to parallelogram law:

**Magnitude Of resultant Vector**

Magnitude of resultant vector can be determined by using either sine law or cosine law.

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