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anonymous
 5 years ago
Find all solutions to the equation in the interval [0, 2π)
2 cos x + sin 2x = 0
anonymous
 5 years ago
Find all solutions to the equation in the interval [0, 2π) 2 cos x + sin 2x = 0

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0hi kcb,, the trig identity is: sin 2x=2sin x cos x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0therefore, 2cos x +2sin x cos x+0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0im sorry,its equal to zero 2cos x +2sin x cos x=0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now take out the cos x,... cos x (2+2sin x)=0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0here both are equaled to zero that is, cos x =0 and 2+2 sin x = 0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x=arc cos 0 and 2sin x=2 sin x=2/2 sin x=1 x=arc sin 1 x=pi/2 and x=pi/2
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