$\frac{cos^{3}x-cos^{2}x}{sinx+cosx}=2(1+tanx)$
$\frac{cos^{3}x-cos^{2}x}{sinx+cosx}=2(1+tanx)$
Started By quoctruong1202, 09-09-2013 - 17:06
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Posted 09-09-2013 - 17:06
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