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

If x=sin 130 cos 80, y=sin 80 cos 130, z=1+xy,
which one of the following is true

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

The correct option is B x > 0, y < 0, 0 < z < 1
x=sin 130 cos 80, y=sin 80 cos 130
x=cos 40 cos 80, y=sin 80 sin 40
So, x > 0 and y < 0 and xy < 0
Now, z = 1 + xy 0 < z < 1.

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