15°25′34〃×3=15°*3+25′*3+34〃*3=45°+75′+[(102〃)/60]=45°+75′+1.7′=45°+76.7′=45°+(76.7′/60)≈45°+1.2783°=46.2783°38°24′36〃=38°+24′+(36〃/60)=38°+24′+0.6〃=38°+24.6′=38°+(24.6...