Y=2x+1, y=3, x=?
3=2x+1, 2x=2, x=1
Otvet: x=1
arctg (-1)-arctg 1=3pi/4-pi/4=2pi/4=pi/2
arcsin( -1)-arccos (-<span>√2/2)=3pi/2-3pi/4=6pi/4-3pi/4=3pi/4</span>
<span>arcsin (-1/2)-arctg 1/<span>√3=7pi/6-pi/6=6pi/6=pi</span></span>
<span><span>arcsin 1+arcctg <span>√3=pi/2+pi/3=3pi/6+2pi/6=5pi/6</span></span></span>
5/3•5/7–14/3•5/7 5/7(5/3–14/3)
------------------------ = ------------------ =
81/49–9/7•2/7 81/49–18/49
5/7•(-3) 15•49 5
= ---------- = – --------- = – -----
63/49 7•63 3