-lutfi28- 
∫cos² x dx = ∫[(cos 2x + 1)/2] dx = ∫(1/2 cos 2x + 1/2) dx = 1/4 sin 2x + 1/2x + C
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Country: Indonesia
Last login: 2015-06-14 07:33
Registration: 2014-04-29 12:07
Country: Indonesia
Last login: 2015-06-14 07:33
Registration: 2014-04-29 12:07