If `|bar(P)| = 2, |bar(q)| = 3 and (bar(p),bar(q)) = (pi)/6`, then find `|bar(p) xx bar(q)|^(2)`

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

If bar(p) = xbar(i) + ybar(j) + zbar(k) , find the value of |bar(p) xx bar(k)|^(2)

If bar(a) = 2bar(i) - 3bar(j) + bar(k) and bar(b) = bar(i) + 4bar(j) -2bar(k) , then find (bar(a) + bar(b))xx(bar(a)-bar(b))

If bar(r)=3bar(p)+4bar(q)" and "2bar(r)=bar(p)-3bar(q) then

If bar(p)=bar(a)+bar(b),bar(q)=bar(a)-bar(b),|bar(a)|=|bar(b)|=r , then |bar(p)timesbar(q)| =