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If veca and vecb are unit vectors such t...

If `veca` and `vecb` are unit vectors such that `vecaxxvecb` is a unit vector, then the angle between `veca` and `vecb` is ____

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If veca and vecb are unit vectors and veca-vecb is also a unit vector, then write the measure of the angle between veca and vecb .

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ARIHANT PUBLICATION-SAMPLE PAPER 3 -SHORT ANSWER TYPE QUESTIONS
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