If `| vec a|=2,|vec b|=5` and `| vec a xx vec b|=8,` find ` vec a . vec bdot`

If | vec a|=2,\ | vec b|=5\ a n d\ | vec axx vec b|=8,\ find veca.vecb

If | vec a|=sqrt(26 ,)| vec b|=7 and | vec axxvec b|=35 , find vec adot vec bdot

If | vec a|=10 ,\ | vec b|=2\ a n d\ | vec axx vec b|=16 find vec adot vec bdot

If | vec a|=2| vec b|=5 and | vec axx vec b|=8, then find the value of vec a . vec bdot

If two vectors vec a and vec b are such that | vec a|=2,| vec b|=1 and vec adot vec b=1 , find (3 vec a-5 vec b)dot(2 vec a+7 vec b)dot

If | vec a|=sqrt(26),\ | vec b|=7\ a n d\ | vec axx vec b|=35 ,find vec adot vec bdot

If | vec a|=8,| vec b|=3 and | vec a x vec b|=12 , find the angle between vec a and vec bdot

If | vec a|=5,| vec a- vec b|=8 and | vec a+ vec b|=10 , then find | vec b|dot

Let vec a , vec b , and vec c are vectors such that | vec a|=3,| vec b|=4 and | vec c|=5, and ( vec a+ vec b) is perpendicular to vec c ,( vec b+ vec c) is perpendicular to vec a and ( vec c+ vec a) is perpendicular to vec bdot Then find the value of | vec a+ vec b+ vec c| .

Find the angle between two vectors vec a and vec b , if | vec a xx vec b|= vec a . vec b .