1) y=4cosx - 3sinx + 6x - 3
y'=-4sinx - 3cosx + 6
y'(π/2)=-4sin(π/2) - 3cos(π/2)+6=
-4*1 - 3*0 + 6=2.
2) y=8tgx + 3x + 2
y'=8/cos²x + 3
y'(0)=8/1 + 3=11.
1) y=4cosx - 3sinx + 6x - 3
y'=-4sinx - 3cosx + 6
y'(π/2)=-4sin(π/2) - 3cos(π/2)+6=
-4*1 - 3*0 + 6=2.
2) y=8tgx + 3x + 2
y'=8/cos²x + 3
y'(0)=8/1 + 3=11.