Let `veca=hati-hatj+hatk, vecb=2hati+hatj` and `vecc=3hatj-2hatk,vecx,vecy,vecz` be linear combination of `veca,vecb ; vecb,vecc;vecc,veca` respectively and `vecr=lamdavecx+muvecy+deltavecz,lamda,mu,delta` are some scalars. If `vecd` is equally inclined to three vectors `veca,vecb,vecc` then