40 балловАлгебра 10 классРешите пожалуйста

 \frac \sqrt2 y2 ;[/tex]

-1/2;[/tex];  
       sin\alpha =2 \pi =0'[/tex]

sin;    sin(-)=0;  sin(7/3) = 3/2;

cos(3/4) =- 2/2;  cos(11/6) =3/2;  cos(13/3) =1/2; cos2 =1;
 cos(9/2) =0;   cos(-)= 1;  cjs(7/3) =1/2;
tg(3/4)=-1;  tg(11/6) =-3/3; tg(2) =0; tg(9/2) =;  tg(-) 0;
tg(7/3) = 3/3;   tg(13/3) =3;
ctg(3/4) =-1;  ctg(11/6) =-3;  ctg(13/3) =3/3;  ctg(2) =;  
ctg(9/2) = -0;  ctg(-) =;   ctg(7/3)=3/3;