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

If f(θ)=5cosθ+3cos(θ+π/3)+7 and af(θ)b, then

A
a=0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
a=7
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
b=14
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
b=7
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct options are
A a=0
C b=14
f(θ)=5cosθ+3cos(θ+π/3)+7
=5cosθ+3(cosθ.cos(π/3)sinθ.sin(π/3))+7
=132cosθ332sinθ+7
Since, 7132cosθ332sinθ7
0f(θ)14
Hence a=0,b=14
Hence, option 'C' is correct.

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