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What is a numerical value for x if cos2x plus 2sinx-2 equals 0?
Wiki User
∙ 13y ago
cos2x + 2sinx - 2 = 0
(1-2sin2x)+2sinx-2=0
-(2sin2x-2sinx+1)=0
-2sinx(sinx+1)=0
-2sinx=0 , sinx+1=0
sinx=0 , sinx=1
x= 0(pi) , pi/2 , pi
Wiki User
∙ 13y ago
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