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chocolatelover

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## Homework Statement

Vector A is 3 m and vector b is 3m. The angle formed by the positive x-axis is 30°. Find A +B

## Homework Equations

## The Attempt at a Solution

Does this look correct?

i=3cos30

j=3sin30

Vector A+B=(3cos30 +3cos30)+(3sin30+3sin30)

=8.20

magnitude=square root((3cos30 +3cos30)^2+(3sin30+3sin30)^2)

=square root(27+9)=6

theta=tan-1(3sin30+3sin30)/(3cos30+3cos30)=77.55

and if it were vector A-B, the only difference would be that you would take (3cos30+3cos30)+(-3sin30-3sin30) and the magnitude would be square root of (3cos30+3cos30^2)+(-3sin30-3sin30)^2 right?

Thank you very much

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