[" 25.If "a+b+c=0" and "|a|=3,],[|b|=5,|c|=7" find the angle "2],[" between "a" and "b" ."]

If a+b+c=0 and |a|=sqrt(37),|b|=3, |c|=4 then the angle between b and c is

If a+b+c=0 and |a|=5, |b|=3 and |c|=7 , then angle between a and b is

If vec(a) , vec(b) and vec(c ) be three vectors such that vec(a) + vec(b) + vec(c )=0 and |vec(a)|=3, |vec(b)|=5,|vec(C )|=7 , find the angle between vec(a) and vec(b) .

If a+b+c=0" and "abs(a)=3, abs(b)=5" and "abs(c)=7 then the angle between a and b is

Vector vec a , vec b and vec c are such that vec a+ vec b+ vec c= vec0 and |a|=3,| vec b|=5 and | vec c|=7. Find the angle between vec a and vec b .

Vector vec a,vec b and vec c are such that vec a+vec b+vec c=vec 0 and |a|=3,|vec b|=5 and |vec c|=7. Find the angle between vec a and vec b.