sin56度32'48"+cos72.36=?精确到1"

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sin56度32'48

sin56度32'48"+cos72.36=?精确到1"
sin56度32'48"+cos72.36=?精确到1"

sin56度32'48"+cos72.36=?精确到1"
约分:108/144=3/4 36/21=12/7 4 12/15=4 4/5 60/25=12/5 72/32=9/4 2 63/81=2 7/9 15/45=1/3 1 39/65 =1 3/5 60/48=5/4 16/56=2/7
通分:2/3 5/6 =4/6 5/6 1/2 1/3=3/6 2/6 3 4/7 1 5/11=112/77 275/77 7/10 4/9=63/90 40/90 7/54 5/18=7/54 15/54 1 1/4 3 1/20=25/20 61/20 2/5 3/10 4/15=12/30 9/30 8/30 1/2 3/4 7/8=4/8 6/8 7/8 2 4/7 5 1/4 1 3/5
=360/140 735/140 224/140 7/8 4/5 2/9=315/360 288/360 80/360