Is the equation 2 cos square x + cos x minus 6 is equal to zero is a possible?
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Answer: the value of the equation is an empty set
Step-by-step explanation:
When we factories the equation, we get
=> (cosX + 2) * (2cosX - 3) = 0
=> cozX = -2, 3/2
As cosX lies in the interval [-1,1] it cannot have values like -2 and 3/2
Therefore, the value of the above equation is an empty set
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