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2、.fifflaJ:i:.=.11HR1,f!/J,ffl:it#ffl 7mq:i 1JflJ lt4,YIIA.lflJ It:JUJfit:tmF:*(,t)60 70 80 90 100 Aft CA)7 12 10 8 3 A.701,701 B.70 7,80 7t C.80 7,80 7-D.80,t,70,t f(-)ft:J z.n 6.A.LDAE=LB C.AE/BC 0 B.LEAC=LC D.LDAE=LEAC C E B ffi7.IIOO laD B O C ffi9/i00 7.t,nOO,BOP5f?tLAOB,LAOB=60,CP=2,CP/OA,PDl.OA
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9、nZJaJil!mL M CB,M,D.:=.R.i:tE-*1t.1:)!lt!HiitiitJ9!A,:1119!C 1qJ:ffJ?lj 37 60,tE A:tfU C 1J1qJ:ffJ 30,!JltllA-rn:tf CD lt-Jjgjt.(sin37:0.60,cos37:0.80,tan37:-0.75,./3:I.73,ffiJlj 0.lm)J.i(-)(1)5K4ijJ(2)=!r jjlJ 3K pt aJ:i!:flt.-;t:.,#*tlL!22.(IO?-:iii ABCD aJj 20.(97):tzllOO,tElrff:lt;ji:p.OABC(l(Jj
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12、jIJEI/itl%ABCD llJitl BC,CD _t,LEAF=.!_ LBAD,i!f&EF,i.l EF,BE,DF zje 1J:i:2 A B C.(-)Cl).ffl.ilHIUI D.ABE tie A jJ LFDG=l80,fll)F,D,-(2)lt31:tzll 00 2,tE 00 1 lJ f:1 1JJ!-S;!lJ:,LEAF=.!_ L.2 c 3)ItUt0:6Jl:till 00 3,:tf.t.ABC g:BD=l,EC=2,Jlrj DE flJ 23.(11:$t):fm Ill:Jt*tfl/X=-1,P(I)3JtJM!?J(l(J(2)R.
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