SOLUTION: there are four values of x in the interval 0≤ θ ≤360 that satisfy the equation 2 sin 2x+cosx=0. Which of the following is NOT a solution to this equation?
a)14.5
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-> SOLUTION: there are four values of x in the interval 0≤ θ ≤360 that satisfy the equation 2 sin 2x+cosx=0. Which of the following is NOT a solution to this equation?
a)14.5
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Question 432271: there are four values of x in the interval 0≤ θ ≤360 that satisfy the equation 2 sin 2x+cosx=0. Which of the following is NOT a solution to this equation?
a)14.5
b)90
c)194.5
d)270 Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! there are four values of x in the interval 0≤ θ ≤360 that satisfy the equation 2 sin 2x+cosx=0. Which of the following is NOT a solution to this equation?
a)14.5
b)90
c)194.5
d)270
..
2 sin 2x+cosx=0
2(2sinxcosx)+cosx=0
cosx(4sinx+1)=0
cosx=0
x=90
x=270
4sinx+1)=0
sinx=-1/4
x=194.5
ans:
Only 14.5 was not used
(