If |a+b|=|a| then find angle between |2a+b| and |b|.

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Aditya Gupta · Answer

|a+b|=|a| square both sides, a^2+b^2+2a.b=a^2 or b.(b+2a)=0 here a.b means the dot product. so the angle between b and 2a+b is pi/2.

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If |a+b|=|a| then find angle between |2a+b| and |b|.

If |a+b|=|a| then find angle between |2a+b| and |b|.

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If |a+b|=|a| then find angle between |2a+b| and |b|.

If |a+b|=|a| then find angle between |2a+b| and |b|.

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