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Physicsnoob90
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Homework Statement
Vector A has magnitude A = 4.0 units and is directed θA = 15◦ counterclockwise from the positive x-axis. Vector B has magnitude B = 4.0 units and is directed θB = 85◦ counterclockwise from the positive x-axis. Determine the following quantity: |A + B|^2 − |A − B|^2.
Homework Equations
The Attempt at a Solution
Steps) 1. i calculated their components: Ax= 4.0 cos 15º = 3.86, Ay= 4.0 sin 15º = 1.04 , A= 4.898979486
Bx= 4.0 cos 85º = 0.35 , By= 4.0 sin 85º = 3.98 , B= 4.333401763
2. plug into the format: |(4.898979486)^2 + (4.333401763)^2| - |(4.898979486)^2 - (4.333401763)^2| = 38
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