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How can I find the angle between the 3d vector & x-axis ?

  • Thread starter @ADAMS@
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Hello :- My name is Anas I'm a new member in this forum .

I have a small question

what is the angle between the vector 3i +j-4k and the x-axis ?

and please explain me what is the method of answer this question

Im sorry , I know I have many mistakes in this topic because my English language is poor

Thank you , and I wish from you to answer me very fast
 

Integral

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Tell us what you know about the Dot product of 2 vectors.
 
2
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I Didnt know about this
Im sorry
 

Integral

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Science Advisor
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Maybe you know it as the http://en.wikipedia.org/wiki/Dot_product" [Broken]
 
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