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Transcript of Core 4
2sinxcosx as sin2x
tanx as sinx/cosx
sin x as 1/2 - 1/2cos2x
before integrating eg 2 Integration (1 + x) = 1 + nx + n(n+1)x/2! + .......
eg (1 - 2x) = 1 + (1/2)(-2x) + (1/2)(-1/2)(-2x) /2! + ......
(8 - x) = 2(1 + (-x/8)) etc n 1/2 2 1/3 1/3 Differential Equations f(x) g(y) dy/dx = p(x)q(y)