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If the equation of two lines are given by `bar(r)=bar(a_(1))+lamdabar(b_(1))andbar(r)=bar(a_(2))+mubar(b_(2))` , where `lamda and mu` are parmater , then the angle `theta` between the lines is

A

`"cos"theta=(bar(a_(1)).bar(b_(2)))/(|bar(a_(1))||bar(b_(2))|)`

B

`"cos"theta=(bar(a_(2)).bar(b_(1)))/(|bar(a_(2))||bar(b_(1))|)`

C

`"cos"theta=(bar(b_(1)).bar(b_(2)))/(|bar(b_(1))||bar(b_(2))|)`

D

`"cos"theta=(bar(a_(1)).bar(a_(2)))/(|bar(a_(1))||bar(a_(2))|)`

Text Solution

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The correct Answer is:
C
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