What would you like to ask?find all the solutions of the equation in the interval 0 2pi 2 sin^2 x= 2 + cos x
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What would you like to ask?find all the solutions of the equation in the interval 0 2pi 2 sin^2 x= 2 + cos x

[From: ] [author: ] [Date: 12-05-22] [Hit: ]
......
Please help I would really appreciate it! thanks!!

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2[1-cos^2(x)] = 2+cosx
2-2cos^2(x)=2+cosx
2cos^2(x)+cosx = 0
cosx(2cosx+1) = 0
cosx = 0 or -1/2
x = pi/2, 3pi/2 , 2pi/3 and 4pi/3
1
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