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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

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Since ` vecR ` is perpendicular to ` vecA ` . Figure shows the three vectors ` vecA , vecB and vecR` angle between ` vecA ` and `vecB ` is ` pi-theta`
` sin theta =R/B = B / (2B) =1/2`
` implies theta = 30^@ implies ` angle `vecA ` between and ` vecB ` is 150.
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