6 = √10х
6^2 = (√10х)^2
36 = 10х
х = 36/10
х = 3,6
^2 - значит "в квадрате"
2 sin (2 pi - 2x) = √ 2 ;
<span>sin (2 pi - 2x) = √ 2 / 2;
sin (-2x) = </span>√ 2 / 2;
- sin 2x = √ 2/2;
sin 2x = - √ 2/2;
1) 2x = - pi/4 + 2pik; x = - pi/8 + pik; k∈Z.
2) 2x = - 3pi/4 + 2pik; x = - 3pi/8 + pik; k∈Z
{x+12y=11
{5x-3y=3
{x=11-12y
{5x-3y=3
5(11-12y)-3y=3
55-60y-3y=3
63y=52
y=52/63
x=11-12*(52/63)
x=11-(624/63)
x=(11*63-624)/63=(693-624)/63
x=69/63=23/21
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