यदि `|bar(a)+bar(b)|=|bar(a)-bar(b)|`. तो सिद्ध कीजिए कि `bar(a)` और `bar(b)` परस्पर लम्ब हैं |

If |bar(a)+bar(b)|<|bar(a)-bar(b)| then (bar(a),bar(b)) is

If (bar(a),bar(b))=30^(@) then (bar(a),-bar(b))=

If |bar(a)|=2, |bar(b)|=3, (bar(a), bar(b))= pi//6 , then find (bar(a) xx bar(b))^(2)

If |bar(a)|=3,|bar(b)|=4 and |bar(a)+bar(b)|=5, then |bar(a)-bar(b)| is equal to

If |bar(a)| = 13, |bar(b)| = 5, and bar(a).bar(b) = 60 , then find |bar(a) xx bar(b)| .

If (bar(a), bar(b))=60^(@)" then "(-bar(a), -bar(b))=

If bar(a),bar(b) and bar( c ) are perpendicualr to bar(b)+bar( c ),bar( c )+bar(a) and bar(a)+bar(b) respectively and |bar(a)+bar(b)|=6,|bar(b)+bar( c )|=8 and |bar( c )+bar(a)|=10 then |bar(a)+bar(b)+bar( c )| =……………….