sin^2x=0,36
cos^2x=0,64
cosx=-0,8
sin2x=-2*0,6*0,8=-0,96
cos2x=2*0,64-1=0,28
sin 2x cos 2x=-0,96*0,28=-0,2688
1)=2 (3/4корень из6+2)-0,75<span>√6=2</span>
<span>2)=6,3</span>
A | V | t
--------------------------------------------------
1 | 6 | 6/x | x
--------------------------------------------------
2 | 5 | 5/x | x
--------------------------------------------------
1 | 36 | 6/x | 36/(6/x)
--------------------------------------------------
2 | 36 | 5/x | 36/(5/x)
36x/6 +1,5 = 36x/5 : 3
2x+0,5=12x/5
10x+ 2,5-12x=0
2x=2,5
x=1,25
V1=6/x= 6/1,25=600/125=4,8
V2=5/x= 5/1,25=4
40 см- 108 г
(35+40) - Х г
решение : (35+40) х 108 : 40= 202,5 г
Sпр=ab -100\%
Sh=1/2*a/2*b/2=ab/8-[\%
[=ab*100/8ab=12,5\%