" The non-zero vector "vec a,vec b,vec c" related by "vec a=8vec b&vec c=-7vec b" then angle between "vec a" and "vec c" is "

The non-zero vectors vec a,vec b,vec c are related by vec a=8vec b and vec c=-7vec b then the angle between vec a&vec c

The nonzero verctors vec a,vec b and vec c are related by vec a=8vec b and vec c=-7vec b Then the angle between vec a and vec c is

The non-zero vectors are vec a,vec b and vec c are related by vec a=8vec b and vec c=-7vec b. Then the angle between vec a and vec c is

The non-zero vectors vec a , vec b and vec c are related by vec a=8 vec b and vec c = −7 vec b , then the angle between vec a and vec c is

The non-zero vectors vec b and vec c are related by vec a = 8 vec b and vec c = -7 vec b . Then the angle between vec a and vec c is

The non-zero vectors are vec a,vec b and vec c are related by vec a= 8vec b and vec c = -7vec b . Then the angle between vec a and vec c is

The non-zero vectors are vec a,vec b and vec c are related by vec a= 8vec b and vec c = -7vec b . Then the angle between vec a and vec c is

The non-zero vectors are vec a,vec b and vec c are related by vec a= 8vec b and vec c = -7vec b . Then the angle between vec a and vec c is

The non-zero vectors are vec a,vec b and vec c are related by vec a= 8vec b and vec c = -7vec b . Then the angle between vec a and vec c is