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

If 0<cos1x<1 and 1+cos1x+(cos1x)2+=2, then x is equal to

A
π4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
cos12
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
cos12
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
π6
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B cos12
1+cos1x+(cos1x)2+=2
This is an infinite geometric progression
11cos1x=2cos1x=12x=cos12

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Trigonometric Identities_Concept
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon