May 7th, 2014, 11:38 AM  #1 
Senior Member Joined: Nov 2013 Posts: 434 Thanks: 8  min value y= sin2x+cosx
min value y= sin2x+cosx

May 7th, 2014, 12:25 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,511 Thanks: 585 
Have you tried y'=2cos2xsinx = 0 and solve for x?


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