Question

sin альфа = 3/5 найти cos alfa, tg alfa

Answer 1

sin α=3/5
sin²α+cos²α=1 ⇒ cosα=√1-sin²α =√1-9/25=√16/25=4/5

tgα=sinα/cosα=(3/5) /( 4/5)= 3/4 =0.75