<PRE><B>Question 750779</B>
What are the x&#39;s of: 
2cos^2(x)+3cos(x)=0
0 &amp;#8804; cos(x) &amp;#8804; 2&amp;#960;
2cosx(cosx+3)=0
2cosx=0
x=&amp;#960;/2, 3&amp;#960;/2
cosx+3)=0
cosx=-3 (reject, not in domain)

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