tan1=0.017 tan2=0.035 tan3=0.052 tan4=0.070 tan5=0.087 tan6=0.105 tan7=0.123 tan8=0.141 tan9=0.158 tan10=0.176 tan11=0.194 tan12=0.213 tan13=0.231 tan14=0.249 tan15=0.268 tan16=0.287 tan17=0.306 tan18=0.325 tan19=0.344 tan20=0.364 tan21=0.384 tan22=0.404 tan23=0.424 tan24=0.445 tan25=0.466 tan26=0.488 tan27=0.509 tan28=0.532 tan29=0.554 tan30=0.577 tan31=0.601 tan32=0.625 tan33=0.649 tan34=0.675 tan35=0.7 tan36=0.727 tan37=0.754 tan38=0.781 tan39=0.81 tan40=0.839 tan41=0.869 tan42=0.9 tan43=0.933 tan44=0.966 tan45=1 tan46=1.036 tan47=1.072 tan48=1.111 tan49=1.15 tan50=1.192 tan51=1.235 tan52=1.28 tan53=1.327 tan54=1.376 tan55=1.428 tan56=1.483 tan57=1.54 tan58=1.6 tan59=1.664 tan60=1.732 tan61=1.804 tan62=1.88 tan63=1.963 tan64=2.05 tan65=2.145 tan66=2.246 tan67=2.356 tan68=2.475 tan69=2.605 tan70=2.747 tan71=2.904 tan72=3.078 tan73=3.271 tan74=3.487 tan75=3.732 tan76=4.011 tan77=4.331 tan78=4.705 tan79=5.145 tan80=5.671 tan81=6.314 tan82=7.115 tan83=8.144 tan84=9.514 tan85=11.43 tan86=14.3 tan87=19.081 tan88=28.636 tan89=57.29
此表为tan1°－89°的三角函数值，相对方位角用龙门架到中线中点的距离×相应的函数值等于相对方位角从中点需要移动的距离。