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Answer 1 · 2018-01-05T10:25:11

#hat a=1/5(4hati+3hatj)#

for #veca#

the unit vector is given by

#hata=veca/(|veca|)#

we have

#vec a=4hati+3hatj#

#|veca|=sqrt(4^2+3^2=sqrt25=5#

#:.hat a=1/5(4hati+3hatj)#