1) cos x/8 = - корень из 2 /2
х/8= 3π/4
х = 3π*8/4
х = 3π*2
х = 6π
2)sin (3x/5+п/3)=корень из 3/2
3х/5 + π/3 = 2π/3
3х/5 = 2π/3 -π/3
3х/5 = π/3
3х = 5π/3
х = 5π/9
3)-tg(2x- п/6)=1
tg(2x-π/6) = -1
2x -π/6 = 3π/4
2x = 3π/4 +π/6
2x = (9π+2π)/12
2x = 11π/12
x = 11π/24
4)(2sinx- корень из 3)/2cosx-1=0
2cosx-1 ??? все в знаменателе ???
5)(2cosx-корень из 3)/2cosx-1=0
2cosx-1????
6)sin6x/1-cos6x=0
1-cos 6x ????
7)(sin(x-п/4)+1)=0
sin x cosπ/4 - cosx sinπ/4 +1=0
sin x√2/2 - cosx√2/2 +1 =0
sinx√2 - cosx√2 + 2 =0
√2(sinx-cosx)=-2
sinx-cosx = -2/√2
8)(sin3x-1)*(tg(x/2)+1)=0