MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
pallavi pradeep bhardwaj Grade: 12
        

I a,b,c be three unit vectors such that a*(b*c)=1/2b and b is not parallel to c then the angle between a and c is

8 years ago

Answers : (2)

Badiuddin askIITians.ismu Expert
147 Points
										Dear pallavi

a X(b X c)=1/2b

or (a.c)b -(a.b)c =1/2 b
 
or  ((a.c) -1/2)b - (a.b)c =0
b is not parallel to c

so coefficient of b must be zero
a.c   -1/2 =0
a.c =1/2
|a| |c| cosT  =1/2

where T is angel between a and c
1*1* cosT =1/2
T =60

Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin
										
8 years ago
Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavi

a X(b X c)=1/2b

or (a.c)b -(a.b)c =1/2 b

or ((a.c) -1/2)b - (a.b)c =0

b is not parallel to c so coefficient of b must be zero

a.c -1/2 =0

a.c =1/2

|a| |c| cosT =1/2 where T is angel between a and c

1*1* cosT =1/2

T =60

Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE & AIEEE preparation.

All the best. Regards,

Askiitians Experts

 Badiuddin

8 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
  • Statistics and Probability
  • OFFERED PRICE: Rs. 636
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details