Найди tgd,ctgh,еслиsin 0,6
Sin α=0.6; sin²α+cos²α=1; cos²α=1 - sin²α= 1 - 0.36 = 0.64. cosα=√0.64=0.8. tgα=sinα/cosα=0.6/0.8=0.75. ctgα=cosα/sinα=0.8/0.6=1,(3)