Funções trigonométricas
Ensaio: Funções trigonométricas. Pesquise 862.000+ trabalhos acadêmicosPor: thiago28 • 6/4/2014 • Ensaio • 1.360 Palavras (6 Páginas) • 164 Visualizações
1)∫▒cos〖(t^2 〗 ) dt U= t^2
∫▒〖t cos〖(u) du/2t〗 〗 du =2t dt
1/2 ∫▒cos〖(u)du 〗 dt = du/2t
sin〖(t^2 〗)
R: ( 1)/2 sin〖(t^2 〗)
2) ∫▒〖y(y^2+5)^8 〗 dy u =y^2+5
∫▒〖y u^(8 ) du/2y〗 du = 2y dy
1/2 ∫▒u^8 du dy = du/2y
1/(2 ) y^9/9 ==R: 1/18 (y^2+5)^9
3) ∫▒t^2 (t^3-3)^10 dt u = t^3-3
∫▒t^2 (u)^10 du/〖3t〗^2 Du = 3t^2 dt
1/3 ∫▒u^10 du Dt = du/(3t^2 )
1/3 u^11/11 R: 1/33 (t^3-3)^11
4)∫▒1/√(4-x) dx -2 √u u=4-x
∫▒1/√u-du R: -2√(4-x) Du=-1 dx
-1∫▒1/√u du Du=-dx
-1∫▒〖u-1/2〗 du Dx=-du
-1 u^(1/2)/(1/2)
-2 u^(1/2)
5)∫▒x^2 e^(x^3+1) dx u= x^3+1
∫▒x^2 e^u du/〖3x〗^2 Du=3x^2 dx
1/3 ∫▒e^u Dx=du/〖3x〗^2
1/3 e^u R: 1/3 e^(x^3+1)
6) ∫▒tan(2x)dx u= 2x
∫▒tan〖(u) du/2〗 Du= 2 dx
1/2 ∫▒tan(u)du Dx=du/2
1/2-ln⟦cos(u) ⟧
1/2-ln⟦cos(2x)⟧ R:
7) ∫▒y/(y^2+4) dy u= y^4+4
∫▒y/u du/〖4y〗^3 Du = 4y^3dy
1/4 ∫▒1/u du Dy= du/〖4y〗^3
1/4 lnu
1/4 ln〖〖(y〗^4 〗+4)R:
8)∫▒tan〖x dx〗 ∫▒sinx/cosx
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