1)сtg²a*sin²a=cos²a/sin²a*sin²a=cos²a2)E(f)=-1/2*[-1;1]=[-1/2;1/2]3)f`(x)=14x^6-4sinxf`(0)=04)cosx(cosx-2)=0cosx=0⇒x=π/2+πncosx=2>1 нет решения5)1/(x+3) -1>0(1-x-3)/(x+3)>0(x+2)(x+3)<0x=-2 x=-3x∈(-3;-2)6)1/2*(-π/3)+1/2*5π/6)=-π/6+5π/12=3π/12=π/47)y`=-2x+12x³y`(-1)=2-12=-108)sinx<0x∈(2πn;π+2πn)9)x²/(1-x)(1+x)≥0x=0 x=-1 x=1 + _ _ +------------------------------------------------------------------------------ -1 0 1x∈(-∞;-1) U (1;∞)B1)v(t)=10t+3=3310t=33-3=30t=30:10=3B2)2cos4xcosx+cos2x=0cos2x(2cos4x+1)=0cos2x=0⇒2x=π/2+πn⇒x=π/4+πn/2cos4x=-1/2⇒4x=+-2π/3+2πn⇒x=+-π/6+πn/2B3)f`(x)=x²-x-6=0x1+x2=1 U x1*x2=-6x1=-2 U x2=3 + _ +-------------------------------------------------------------- -2 3 minF(3)=9-4,5-18+25,5=12B4)(1-x²)≥0⇒-1≤x≤1x²-1≥0⇒x≤-1 U x≥1Ответ x=-1;x=1B5)f`(x0)=10f`(x)=2ax+4f`(-1)=-2a+4=10-2ax=10-4=6a=6:(-2)=-3