1.

If →a and →b are unequal vectors such that (→a−→b)×[(→b+→a)×(2→a+→b)]=→a+→b, then the angle θ between →a and →b is

Answer»

If a and b are unequal vectors such that (ab)×[(b+a)×(2a+b)]=a+b, then the angle θ between a and b is



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