proving x.(3+cosx)>2sinx

emreyunus

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x.(3+cosx)>2sinx , x>0 I should solve this problem with mean value teorem and I am not sure how to because of x>0 but not x>=0.
 
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I have a similiar question but this time that rule seems like can not help. Then how we can prove x.(2+cosx)>3sinx
You cannot prove that because it is not true.

[MATH]0\{2 + cos(0)\} = 0(2 + 1) = 0 * 3 = 0 \not > 0 = 3sin(0).[/MATH]
 
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