Question

ПОЖАЛУЙСТА ПОМОГИТЕ!!!!!!!!!!!!!!!СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1. sinα=5/13
2. tgα=2/7
3. 4sin²60 град.+1=4*(√3/2)²=4*(3/4)=3
4. 20
5. cosCAH=AH/AC
cosCAH=6√3/12=√3/2
CAH=30 град.
6. sin²α+cos²α=1
sin²α=1-cos²α
sinα=√1-cos²α
sinα=√1-(√15/4)²=√1-15/16=√1/16=1/4(0,25)