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1 tan13=0.2308681911255631 tan14=0.24932800284318068 tan15=0.2679491924311227 ta...

sin63=0.8910065241883678 sin64=0.898794046299167 sin65=0.9063077870366499 sin66...

cos60°,∠A=在△∴∠∵∴CM在△∴∠∴MD?BM?∴CD?CM?MD?15?．综合实践课上，小明所在小组要测量护城河的宽度。[_host_]如图所示是护...