5x^2*(-3*X^3)^2= -5x^2*9X^6=-45X^8
(5,2 * 10^(-3)) * (4.4*10^4) =
= 5.2*4.4 * 10^(-3+4) = 22.88 * 10^1
y'=(3x^3+5x^2+2x-7)'=9x^2+10x+2
1)cos²β+sin²β+tg²α=1+tg²α=1+sin²α/cos²α=(cos²α+sin²α)/cos²α=1/cos²α
2)sinαcos3α+cosαsin3α=sin(α+3α)=sin4α
3)sin2α/2cosα=2sinαcosα/2cosα=sinα
sin²α+cos²α=1
sin(α+β)=sinαcosβ+cosαsinβ
sin2α=2sinαcosα
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