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oke, bagus2
sin^2x+cos^2x=1, maka 1+1 = (sin^2x+cos^2x) + (sin^2x+cos^2x) = 2sin^2x+2cos^2x = 2(sin^2x+cos^2x) = 2(1) = 2. jadi, 1+1 = 2
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