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

If xcos y+ycos x=5. Then

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

The correct option is C at x = y = 1, y’ = – 1
xcos y+ycos x=5
ecos y logex+ecos x logey=5
ecos y loge x{cosyxloge x(sin y)dydx}+ecosx logey{cos xydydxsin x logey}=0
Putx=y=1, (cos 10)+(cos 1dydx0)=0
dydx=1
or y=1

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon