wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The values of x for which the angle between the vectors a=x^i3^j^k and b=2x^i+x^j^k is acute, and the angle between the vectors b and the y-axis of ordinates is obtuse, are

A
1,2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2,3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
All x<0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
All x>0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C All x<0
Since the angle between the vectors a and b is acute and the angle between b and the y-axis is obtuse, therefore, a.b>0 and b.^j<0
2x23x+1>0 and x<0
(2x1)(x1)>0 and x<0
(x<12 or x>1) and x<0 all x<0

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Gauss' Law Application - Infinite Sheet
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon