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thuanhoang1712

thuanhoang1712

Đăng ký: 13-12-2011
Offline Đăng nhập: 22-01-2013 - 21:23
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$cos^{2}x+cos^{2}2x+cos^{2}3x+cos^{2}4x=0$

24-06-2012 - 23:13

$cos^{2}x+cos^{2}2x+cos^{2}3x+cos^{2}4x=0$

$4cos^{4}x-3cos^{2}x-cos5x.cos7x=0$

24-06-2012 - 22:58

$4cos^{4}x-3cos^{2}x-cos5x.cos7x=0$

$sin3x-cos(\frac{\pi }{6}-x)=0$

24-06-2012 - 22:37

$sin3x-cos(\frac{\pi }{6}-x)=0$

$\int_{0}^{4}\frac{ln\sqrt{2x+1}}{\sqrt{(2x+1)^{3}}}dx$

08-05-2012 - 21:03

$\int_{0}^{4}\frac{ln\sqrt{2x+1}}{\sqrt{(2x+1)^{3}}}dx$

$\int_{0}^{1}\frac{dx}{\sqrt{(x+1)^{3}(3x+1)}}$

08-05-2012 - 20:59

$\int_{0}^{1}\frac{dx}{\sqrt{(x+1)^{3}(3x+1)}}$