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If by keeping the magnitude of two vectors constant, the angle between them is increased, then what will be the effect on the magnitude of resultant?


The magnitude of the resultant will decrease.
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When does the direction of resultant of two vectors coincide with each of them?

When the two vectors are like parallel vectors, then the direction of the resultant of two vectors coincides with each of them.

Like vectors are vectors in the same direction. 
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If straight R equals square root of straight A squared plus straight B squared end root comma then what is the angle between them?


The angle between the vectors A and B is given by, 

                            space tan to the power of negative 1 end exponent open parentheses straight B over straight A close parentheses.

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Is open vertical bar straight A with rightwards arrow on top plus straight B with rightwards arrow on top close vertical bar space equals space open vertical bar straight A minus straight B close vertical bar?


Yes, this is possible if straight A with rightwards arrow on top space and space straight B with rightwards arrow on top are unlike parallel vectors. 

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When does the direction of resultant of two vectors coincide with each of them?

When the two vectors are like parallel vectors, then the direction of the resultant of two vectors coincides with each of them. 

Like vectors are the vectors in the same direction. 
120 Views

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