15 балов,умоляю быстрее
1) sinα=+-√(1-cos²α)=+-√(1-⅓²)=+-√(9/9 - 1/9)= +-√(8/9)=+-⅔ √2. tgα=sinα/cosα= (+-⅔ √2)/(⅓)=+-2√2. ctgα=1/tgα=1/(+-2√2)=+-1/(2√2). 2) ctgα=1/tgα=¼.