Question

if abc are non zero vectors​

Answer 1

Answer:

a.b=b.c=c.a=0

=a⊥

r

b

=b⊥

r

c

c⊥

r

a

∣(a×b).c∣=∣a×b∣∣c∣cos(a×b

n

c)

a×b is⊥

r

to a and b

but C is also ⊥

r

to a and b

∴ c is parallel to

a

ˉ

×

b

ˉ

cos(a×b

n

c)=1

=∣a×b∣∣c∣

∣a∣∣b∣∣c∣sin90

o

∣a∣∣b∣∣c∣