1.

For any vector vecr = xhati+yhatj+zhatk, prove that vecr = (vecr.hati)hati+(vecr.hatj)hatj+(vecr.hatk)hatk.

Answer»

Solution :Clearly `VECR.i` = X, `vecr.j` = y and `vecr.K` = Z
therefore `vecr` = xi+yj+zk
= (vecr.i)i+(vecr.j)j+(vecr.k)k.


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