## anonymous one year ago How to subtract and add vectors? For the vectors shown in Fig. 3-32 (A = 64.0 and θ = 56.0°), determine the following. Fig. 3-32 = http://imgur.com/pdGd3Pt (a) C - A - B Find the magnitude and direction (b) 2A - 3B + 2C Find the magnitude and direction Thanks!

1. Abhisar

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2. Abhisar

You can use the following formulas: $$\sf|\vec{A}+\vec{B}|=\sqrt{A^2+B^2+2AB.Cos(\theta)}\\ |\vec{A}-\vec{B}|=\sqrt{A^2+B^2-2AB.Cos(\theta)}$$ Note: $$\sf \theta$$ is the angle between two vectors when tails of both the vectors are joined together. See the illustration below. |dw:1441361647783:dw|