дано: tga=13/84. Найдите sina, сosa

tg²α+1=1/cos²αcos²α=1/(tg²α+1)cos²α=1/(169/7056+1)cos²α=1/(7225/7056)cos²α=7056/7225cosα=84/85tgα=sinα/cosαsinα=tgα*cosαsinα=13/84*84/85sinα=13/85