Cosa =4/5. Найти sin tg ctg

Question

Cosa =4/5. Найти sin tg ctg

Answer 1

Sin=1^-(4/5)^=1-16/25=9/25=3/5

tg=sin/cos=3/5÷4/5=3/5×5/4=3/4

ctg=cos/sin=4/5÷3/5=4/5×5/3=4/3