2014+891=2905 или 2014+893=2907 или 2014+896=<span>2910.</span>
−2cos^2(X)=4
−12⋅(−2cos^2(X))=−12⋅4
cos^2(X)=−1:2⋅4
cos^2(X)=−1:1⋅2:1
cos^2(X)=−2
24,8:(6,08x-20,8)*2,7=1,674
24,8:(6,08x-20,8)=1,674:2,7
24,8:(6,08x-20,8)=0,62
6,08x-20,8=24,8:0,62
6,08x-20,8=40
6,08x=20,8+40
6,08x=60,8
x=60,8:6,08
x=10
729 : (301 - a) = 33-24
729 : (301 - a) = 9
301 - a = 729 : 9
301 - a = 81
a = 301 - 81
a = 220