Question

Помогите пожалуйста!!!

Answer 1

20/cos(33°)²+3+cos(123°)²=20/cos(33°)²+3+cos(90°+33°)²=20/cos(33°)+3+(-sin(33°))²=20/cos(33°)²+3+sin(33°)²=20/1+3=20/4=5

51cos(4°)/sin(86°)+8=51cos(90°-86°)/sin(86°)+8=51sin(86°)/sin(86°)+8=51+8=59