�� 5 �� 3 �� 10 �� (��)

�� #1

�� , ��, �� 10 ��, ��:

1. ��:

�) sin(30�)+v6cos(45�)sin(60�)-tg(30�)ctg(150�)+ctg(45�);

�) cos(?/3)-v2sin(3?/4)+v3tg(?/3).

2. �� :

�) (1-cos(?))(1+cos(?))/sin^2(-?), ???n, n?Z;

�) sin(3?+?)+cos(?-?)-sin(-?)+cos(-?).

3. ��:

�) (sin^2(?)-cos^2(?))^2+4sin^2(?)cos^2(?);

�) tg(?)+ctg(?), �� sin(?)cos(?)=0,3.

4. �� ?, �� :

�) sin(?)=-v3/2; �) cos(?)=v2/2; �) tg(?)=v3/3; �) ctg(?)=-v3.

5*. ��:

�) tg^2(?)+ctg^2(?), �� tg(?)+ctg(?)=4;

�) 1-2/(tg(?)+ctg(?)), �� cos(?)-sin(?)=-1/3.

6*. �� arcsin(1)-arccos(v3/2)-arctg(-v3/3)/arcctg(-v3).

7*. �� , � �� 40% �� 60% ��. �� ?

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