y(3)=27+9=36
y'=3x^2+3
y'(3)=27+3=30
36=30*3+b
b=36-90=-54
y=30x-54
1)
(2sin2a-2sin2acos2a)/(2sin2a+2sin2acos2a)=2sin2a(1-cos2a)/2sin2a(1+cos2a)=2sin^2a/2cos^2a=tg^2a
y(3)=27+9=36
y'=3x^2+3
y'(3)=27+3=30
36=30*3+b
b=36-90=-54
y=30x-54
1)
(2sin2a-2sin2acos2a)/(2sin2a+2sin2acos2a)=2sin2a(1-cos2a)/2sin2a(1+cos2a)=2sin^2a/2cos^2a=tg^2a