If |a-b| = |a| = |b|, then the angle between a and b is? (VECTORS)

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If |a-b| = |a| = |b|, then the angle between a and b is? (VECTORS)

Asked by fireakanksha | 04 May, 2020, 08:08: PM

Expert Answer

open vertical bar A minus B close vertical bar space equals space square root of open vertical bar A close vertical bar squared space plus space open vertical bar B close vertical bar squared space minus space 2 open vertical bar A close vertical bar open vertical bar B close vertical bar cos theta end root space equals space open vertical bar A close vertical bar space equals space open vertical bar B close vertical bar space square root of open vertical bar A close vertical bar squared space plus space open vertical bar A close vertical bar squared space minus space 2 open vertical bar A close vertical bar open vertical bar A close vertical bar cos theta end root space equals space open vertical bar A close vertical bar space T h u s comma space s q a u r i n g space o n space b o t h space s i d e s comma space w e space g e t comma space 2 open vertical bar A close vertical bar squared space minus space 2 open vertical bar A close vertical bar squared space cos theta space equals space open vertical bar A close vertical bar squared space T h u s comma space cos theta space equals space 1 half theta space equals space pi over 3 space equals space 60 degree

Answered by Shiwani Sawant | 04 May, 2020, 08:57: PM

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