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The resultant of two vectors vecA and ve...

The resultant of two vectors `vecA` and `vecB` is perpendicular to the vector `vecA` and its magnitude is equal to half of the magnitude of the vector `vecB`. Find out the angles between `vecA` and `vecB`.
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Text Solution

Verified by Experts

`R=Bcos theta`. As per question ,
`R=B//2=Bcos theta`
or `cos theta=1//2 or theta=60^(@)`
Hence, angle between `vec(A) and vecB=90^(@)+60^(@)=150^(@)`.
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