confirm...

If axb=c
bxc=a
then find relation b/w a,b,c

I have got some ans..but i dont have answer key..so tell me ur answer.....

10 Answers

62
Lokesh Verma ·

(a-c) x b = (c-a)

but we know that (a-c)xb is perpendicular to a-c vector.. so c-a = 0

Is this what you got?

62
Lokesh Verma ·

but b is a vector..

how can it be equal to a scalar?

and you must have been tempted to say -1 not 1 ;)

24
eureka123 ·

sorry..my comment got deleted accidnetly..

"So are u geting b=1 ?? ""

but sir in options are

a)a=1,b=c
b)c=1,a=1
c)b=2,c=2a
d)b=1,c=a

62
Lokesh Verma ·

are these vecots a, b, c or scalars!!

if they are scalars then the answer will be b (c=1=a)

62
Lokesh Verma ·

I Mean yeah after seeing the options, the obvious thing is that these are scalars and not vectors..

so the correct answer is option (b)

24
eureka123 ·

they are vectors sir....and i think ans should be d

62
Lokesh Verma ·

eureka.. if they are vectors.. then the only option is a-c is zero..

otherwise a=1 makes it a scalar..

hence the answer will be that the question is wrong :D

24
eureka123 ·

oh yes....forgot that cross procuct....so silly [3][3]

so answer is just b=c

thanx [1][1]

62
Lokesh Verma ·

arrey na..

the answer is just a=c [3] [6]

1
sahil jain ·

a,b,c are perpendicular

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