Відповіді АЛГЕБРА: 11.1-2

11.1

1) sin(π2 – α) = cosα

2) tg(90° + α) = –ctgα

3) ctg(π – α) = –ctgα

4) cos(180° + α) = –cosα

5) cos(270° – α) = –sinα

6) sin(3π2 + α) = –cosα

7) tg(360° – α) = –tgα

8) ctg(2π + α) = ctgα

11.2

1) cos(90° – α) = sinα

2) ctg(π2 + α) = –tgα

3) tg(180° – α) = –tgα

4) sin(π + α) = –sinα

5) tg(3π2 – α) = ctgα

6) cos(270° + α) = sinα

7) ctg(2π – α) = –ctgα

8) sin(360° + α) = sinα