Sin(2П -x) = -sin(x) =1/2
-sinx = sin(-x)=1/2
X= -30°
(1+4а)^2= 1^2+2*1*4a+(4a)^2=2+8a+8a^2=2+72 (2-3a)^3=2^3-3*2^3*3+3*2*3a^3+3a^3=8-72a+162a+27a=8-261a
1+2ab^2)^3=1^3+3*1^3*2ab+3*1*2ab^3+2ab^5=1+6ab+48ab+96ab=1+ +150 (2a-4b)^3=2a^3-3*2a^3*4b+3*2a*4b^3+4b^3=8a-96ab+384ab+64b=8b--480ab^2+64b
3^(x+6)≥3^(3*x)
x+6≥3x
2x≤6
x≤3
A1=5a
S=a^2
S1=(5a)^2=25a^2
в 25 раз