Find a unit vector perpendicular to both of the vectors a+b and a-b|Vector algebra|12|CBSE|BOARD|CET

Vector Algebra‪@FountainofMathematics‬

[@atulrawat-hh4nq]

why didnt we use formula ± a X b / la X bl

[@Upadhyayclasses1412]

Sir kya jo unit vector perpendicular hain aur cross produt kar ke jo vector milega unka direction same hoga ? Reply

[@FountainofMathematics]

Cross product of two vectors a and b represent the vector axb which is perpendicular to both the vectors a and b. and hence direction ratios of perpendicular vector is taken along axb.

[@tarunpurohit1133]

​@@FountainofMathematics sir ye kaise pta chlega ki cross krna hai ya dot product

[@shrikanth1007]

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[@ravib_s4411]

​@@shrikanth1007😂 seriously?

[@zack176]

​@@FountainofMathematicssir yaha perpendicular the vector par dot product kyu nahi hua

[@user-oi3gu6xw9j]

Why should we dint take here dot product pls reply.

[@FountainofMathematics]

A vector which is perpendicular to both the vectors C and D is a vector C X D. Hence we find here cross product for a+b and a-b

[@avni7296]

Sir cross product kyu karenge? ?

[@user-qu9vy6uz7n]

Sir u should explain how that I(-6×4)-j(-4) will come ..

[@FountainofMathematics]

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[@nishukatyal8677]

In denominator we use magnitude of cross product of c and d
But why not individually magnitude of c and magnitude of d

[@FountainofMathematics]

C X D is a vector which is perpendicular to both Vector C and Vector D.
Hence, | C X D | is not equal to |C|x|D|