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Mathematics, 23.10.2019 21:00 Hrjohnson2004
what is cos(x-30) if tan x= -1 and 90° < x < 180°
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Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.
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