Posted by **Q6** on Wednesday, July 11, 2012 at 12:59pm.

IF A= 2x+3y and B=-x+y,then the angle between the resultant A+B and the positive directio of x-axis is ;.....

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**Elena**, Wednesday, July 11, 2012 at 1:56pm
Ax=2, Bx= - 1 => (A+B)x=2-1=1

Ay=3, By= 1 => (A+B)y=3+1=4

tanα=(A+B)y/(A+B)x =4/1=4,

α =arctan4=76º

- Physica -
**Elena**, Sunday, July 15, 2012 at 1:32pm
Ax=2, Bx= - 1 => (A+B)x=2-1=1

Ay=3, By= 1 => (A+B)y=3+1=4

tanα=(A+B)y/(A+B)x =4/1=4,

α =arctan4=76º

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