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Matematik s.148 (a)Cos(3x+0.249)=0.76, b)2*sin(x)=1.64, c)Tan(2x-0.87)=2…
Matematik s.148 (a)Cos(3x+0.249)=0.76, b)2*sin(x)=1.64, c)Tan(2x-0.87)=2.69, 1., 2., general løsning: u=3x+0.24 , Cos(u)=0.76, 4., Cos(x)=K , x=2*p, 3., x=2pi n+cos^-1(k), x=2 pi n + cos^-1(k)´+2 pi * n, 3x+0,24=2 Pi* n+cos^-1(0,76), 5., u=2pi-cos^-1(0.76)+2pi*n, 7., 6., x=2 pi*n+cos^-1(0,76)0,24, Substituion, Nu ligner ligningen den fra reglen om cos(x)=k)