1)https://imagizer.imageshack.com/img540/4129/2YRy3d.jpg
2) https://imagizer.imageshack.com/img673/9350/V8L2fE.jpg
2)
8/sinx=10/2sinx.cosx
16.sinx.cosx=10.sinx
cosx=10/16=5/8
1)
cos teoremiyle ALK yý bulursak
144+144-288.cosa=(ALK)²
ALK=0,3.t
9/100t²=288(1-cosa)
t²/3200=1-cosa=1-1-2sin²a=2sin²a
t/80=sina/2
t=80.sina/2