CBSE Class 11-science Answered
Kindly provide the answer to this in detail
![question image](https://images.topperlearning.com/topper/new-ate/429494192249101134IMG20180221WA0003.jpg)
Asked by Varsneya Srinivas | 21 Feb, 2018, 10:53: AM
![begin mathsize 16px style cos 2 straight theta plus cosθ plus straight k equals 0
2 cos squared straight theta minus 1 plus cosθ plus straight k equals 0
2 cos squared straight theta plus cosθ plus straight k minus 1 equals 0
Solving space this space quadratic space equation space you space will space get
minus 1 less or equal than cosθ less or equal than 1
rightwards double arrow negative 2 less or equal than straight k less or equal than 9 over 8 end style](https://images.topperlearning.com/topper/tinymce/cache/900cd50231d9a05b8477bfaafc38fdd6.png)
Answered by Sneha shidid | 21 Feb, 2018, 11:28: AM
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