Question

упростить sin^2(x)/1+cos(x)

Answer 1

$frac{sin^2x}{1+cosx}=frac{1-cos^2x}{1+cosx}=frac{(1-cosx)(1+cosx)}{1+cosx}=1-cosx\\===================================\\sin^2x+cos^2x=1Rightarrow sin^2x=1-cos^2x$