A)x/x-5
<span>3/5-x=3/-(x-5)=-3/(x-5)
б)</span>
x/(x-4)^2=x/(x-4)(x-4)=(x^2+4x)/(x-4)^2(x+4)
7/x^2-16=7/(x-4)(x+4)=(7x-28)/(x-4)^2(x+4)
в)
<span>5/x+1=(5x-10)/(x+1)(x-2)
</span>
7/x-2=(7x+7)/<span>(x+1)(x-2)</span>
<span>х^2-5x-36=<span>(x-9)*(x+4)</span></span>
1) cos^2d=3/4 sin^2d=1-cos^2d=1-3/4=1/4 sind=1/2 tgd=sind/cosd=1/sqrt(3) ctgd=sqrt(3)
2) cos^2d=1-1/2=1/2 cosd=sqrt(2)/2 tgd=crgd=1
3) cos^2d=1-1/4=3/4 cosd=sqrt(3)/2 tgd=1/sqrt(3) ctgd=sqrt(3)