` (r.i) (rxxi) + (r.j)(rxxx\j) + (r.k)(rxxk)` is equal to

The value of (r.i)i+(r.j)j+(r.k)k is

The value of (vec r*hat i)(vec r xxhat i)+(vec r*hat j)(vec r xxhat j)+(vec r*hat k)(vec r xxhat k) is equal to

The value of (vec r*hat i)(vec r xxhat i)+(vec r*hat j)(vec r xxhat j)+(vec r*hat k)(vec r xxhat k) is equal to '

(r*hat(i))^(2)+(r*hat(j))^(2)+(r*hat(k))^(2) is equal to

(r*hat(i))^(2)+(r*hat(j))^(2)+(r*hat(k))^(2) is equal to

(r*hat(i))^(2)+(r*hat(j))^(2)+(r*hat(k))^(2) is equal to

(vec r . i) (vec r xx i) +(vec r .j) (vec r xx j)+ (vec r . k)(vec r xx k)=

If vec(r )= x hat(i) + y hat(j) + z hat(k) , then what is vec(r ). (hat(i ) + hat(j) + hat(k)) equal to?