If x is real, cosθ=x+1x then

If $x$ is real, $\cos θ = x + \frac{1}{x}$ then

A
$θ$ is an acute angle
B
$θ$ is right angle
C
$θ$ is an obtuse angle
D
$θ$ not exist

Solution:

$\cos θ = x + \frac{1}{x}$

$\cos θ \leq 1$

$x + \frac{1}{x} \geq 2$

so no solution of $θ$

Related content

Gudi Padwa

JEE Main 2024 April 8 Question Paper with Solutions- Shift 1, 2 Answer Key PDF

CBSE Class 10 English Reported Speech Worksheet

Funeral Leave Application for Office and School

How to Start Preparing For JEE After 10th?

Chemistry Projects for Class 11

NEET 2024: Complete List of Exam Centres

10 Tips to Prepare Well Before CBSE Class 10 Board Exams

Most Easy and Scoring Chapters for NEET 2024 Exam

NEET 2024 Important Topics and Their Weightage