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CBSE Class 11-science Answered

Kindly provide the answer to this in detail   
Asked by Varsneya Srinivas | 21 Feb, 2018, 10:53: AM
Expert Answer
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
Answered by Sneha shidid | 21 Feb, 2018, 11:28: AM

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