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ex46: tan(25°)=FE/FD <=> FE=FD×tan(25°) <=> FE=53×tan(25)=53×0,466307658155 =24,714305882215 mm donc FE ~ 25 mm. rque: tan(25)=0,466307658155
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ex46: tan(25°)=FE/FD <=> FE=FD×tan(25°) <=> FE=53×tan(25)=53×0,466307658155 =24,714305882215 mm donc FE ~ 25 mm. rque: tan(25)=0,466307658155