Помогите прошу. какие сможете.

1. tg^2-4tgx+3=0

2.3sin^2x-4sinx cosx+cos^2x=0

3. cos2x=2sin^2x

4. sin6x cos2x=sin5x cos3x

1. tg^2 x - 4 tg x + 3 = 0;

tgx = 1; x = pi/4 + pi*k; k-Z

tg x = - 3; x = - arctg 3 + pi*k; k-Z.

2. 3 sin^2 x - 4 sinx*cos x + cos^x = 0; / cos^2 x ≠ 0;

3 tg^x - 4 tg x + 1 = 0;

tg x = 1; x = pi/4 + pi*k; k-Z.

tgx = 1/3; x = arctg (1/3) + pi*k; k-Z.

3. cos (2x) = 2 sin^2 x;

cos (2x) = 1 - 2 sin^2 x;

1 - 2 sin^2 x = 2 sin^2 x;

4 sin^2 x = 1;

sin^2 x = 1/4;

sin x = 1/2

sin x = - 1/2.

x = + - pi/6 + pi*k; k-Z.