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Asked by Varsneya Srinivas 21st February 2018, 10:53 AM
Answered by 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 Expert 21st February 2018, 11:28 AM
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