If `bar u=bar a+bar b,bar v=bar a-bar b,|bar a|=|bar b|=2` then `|bar u xx bar v|=`

If bar(mu)=bar(a)-bar(b),bar(v)=bar(a)+bar(b),|bar(a)|=|bar(b)|=2 then |bar(mu)xx bar(v)|=……..

If bar a = 2 bar I + bar j - bar k, bar b = - bari + 2 bar j - 4 bar k and bar c = bar I + bar j + bar k , then find ( bar a xx bar b) cdot (bar b xx bar c) .

if bar a+2 bar b+3bar c=bar 0 then bar axxbar b+bar b xx bar c+bar cxx bara = lambda (bar b xx bar c) ,where lambda=

If bar r=l(bar b xx bar c)+m(bar c xx bar a)+n(bar a xx bar b) and [bar a bar b bar c]=2 , then l+m+n is equal to

If bar(u) and bar(v) are two vectors such that |bar(u)|=3;|bar(v)|=2 and |bar(u)xxbar(v)|=6 then the correct statement is

bar a, bar b, bar c are three vectros, then prove that: (bar a xx bar b) xx bar c = (bar a. bar c) bar b-(bar b. bar c) bar a.

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