1.

Find the angle between the vectors""oversetrarra=overset^^i+overset^^j-overset^^k "and"oversetrarrb=overset^^i-overset^^j+overset^^k

Answer»

SOLUTION :`cos THETA=(veca.vecb)/(AB)= (1-1-1)/(SQRT3 sqrt3)=(-1)/3`
`theta=cos^(-1)(-1)/3)`


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