CMR: $\frac{sin^{4}x}{csin^{2}x+dcos^{2}y}+\frac{cos^{4}x}{ccos^{2}x+dsin^{2}y}\leqslant \frac{sin^{4}x}{csin^{2}x}+\frac{cos^{4}x}{ccos^{2}x}$
Edited by Phan Thien, 05-11-2014 - 21:42.
$\frac{sin^4x}{csin^2x+dcos^2y}+\frac{cos^4x}{ccos^2x+dsin^2y}\leqslant \frac{sin^4x}{csin^2x}+\frac{cos^4x}{ccos^2x}$
Started By Phan Thien, 05-11-2014 - 21:13
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