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HC Verma VECTORS question 12 I dont know how i can draw the fig, so if someone has the book... Im confused bout the first part How do you find the angles with x-axis made by the different vectors. Ans isnt even in HCV solutions. Please explain

HC Verma VECTORS


question 12


I dont know how i can draw the fig, so if someone has the book...


Im confused bout the first part


How do you find the angles with x-axis made by the different vectors. Ans isnt even in HCV solutions.


Please explain

Grade:

1 Answers

Ashwin Muralidharan IIT Madras
290 Points
10 years ago

Hi Shayan,

 

Angle made by any vector A with x-axis is

cos-1[(A.i)/|A|]  -------- read it as "inverseCos{ (A dot i)/ModA }"

ModA is magnitude of A.

 

Regards,

Ashwin (IIT Madras).

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