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# vector problem

a vector of magnitude (51)^1/2 making equal angle with vector a=1/3(i-2j+2k),b=1/5(-4i-3k) and c=j is?

Note by Deepankar Singh
4 years, 4 months ago

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Use the fact that $$\vec{v}\cdot\vec{u}=\left\|\vec{v}\right\|\times\left\|\vec{u}\right\| cos\theta$$ where $$\theta$$ is the angle between the two vectors. Doing this should get you a final vector of (-5,1,5).

- 4 years, 4 months ago

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OK SO I HV TO PUT OL THE VECTORS ....THIS VL GIVE ME 3 EQUATIONS TO SOLVE...RYT????

- 4 years, 4 months ago

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