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Question : 7 of 120
Marks:
+1,
-0
Solution:
Here,
=(+2−3) and
=(3−+2) (+)==(+2−3) +=(3−+2) =4+− |(+)|=√42+12+(−1)2 =√18=3√2 (−)==(+2−3) −=(3−+2) =−2+3−5 |(−)|=√(−2)2+32+(−5)2 =√38 Now,
(+).(−)= (4+−).(−2+3−5) =−8+3+5|(+)||(−)| cos‌θ=0⇒θ=
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