Відповіді АЛГЕБРА: 11.3-4

11.3

1) tg(90° – α) = ctgα

2) sin(π2 + α) = cosα

3) cos(180° – α) = –cosα

4) ctg(π + α) = ctgα

5) sin(3π2 – α) = –cosα

6) ctg(270° + α) = –tgα

7) cos(2π – α) = cosα

8) tg(360° + α) = tgα

11.4

1) ctg(π2 – α) = tgα

2) cos(90° + α) = –sinα

3) sin(π – α) = sinα

4) tg(180° + α) = tgα

5) ctg(270° – α) = tgα

6) tg(3π2 + α) = –ctgα

7) sin(360° – α) = –sinα

8) cos(2π + α) = cosα