1. x=54-9
x=45
2. x=19+56
x=75
3. x=27+14
x=41
<span>(√7+√3)²-√84=7+2</span>√21+3-√84=10
Скинь фото!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Так как sin^2 (127)=sin^2 (90+37)=cos^2 37
И. sin^2 37+cos^2 37=1, то
12/(sin^2 37+sin^2 127)=
12/(sin^2 37+cos^2 37)=
12/1=12