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    • If a.b=a.c then how a is perpendicular to b-c?
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    #Mathematics #Class 12
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    If a.b=a.c then how a is perpendicular to b-c?

    Joshua 13th Apr, 2019
    Answer
    Answer (1)
    Mayukh Sur 15th Apr, 2019

    a.b=a.c

    Therefore, a.b-a.c=0

    a.(b-c)=0

    |a|*|b-c|* cos θ=0

    cos θ=0

    Or angle is 90 degress.

    Hence a will be perpendicular to b-c

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