锟斤拷锟斤拷锟斤拷锟轿的撅拷锟斤拷規(gu锟斤拷)锟斤拷锟斤拷锟絵锟角高匡拷锟侥燂拷锟絚之一锟斤拷锟角歷锟斤拷呖锟斤拷谋乜锟斤拷锟�(n锟斤拷i)锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷}锟斤拷锟斤拷式锟斤拷锟斤拷锟筋優(y锟斤拷u)锟斤拷锟斤拷锟街殿悊锟斤拷}锟斤拷锟斤拷锟�锟斤拷锟竭匡拷锟斤拷锟斤拷锟絵锟斤拷要锟斤拷锟紷锟斤拷锟斤拷規(gu锟斤拷)锟斤拷知锟絉要锟絚锟斤拷锟斤拷锟铰幾傦拷锟斤拷锟芥：

锟斤拷锟斤拷(1) 锟斤拷規(gu锟斤拷)锟侥撅拷锟斤拷規(gu锟斤拷)锟斤拷锟斤拷锟絵锟斤拷锟斤拷锟斤拷锟节撅拷锟皆約锟斤拷锟絣锟斤拷锟铰碉拷锟斤拷值锟斤拷锟絵;

锟斤拷锟斤拷(2) 锟絚锟斤拷锟斤拷(sh锟斤拷)锟斤拷平锟斤拷锟斤拷锟斤拷锟斤拷知锟絉锟結(ji锟斤拷)锟较碉拷锟斤拷值類嗭拷锟絵;

锟斤拷锟斤拷(3) 锟斤拷锟节非撅拷锟皆約锟斤拷锟絣锟斤拷锟铰碉拷锟斤拷值锟斤拷锟絵;

锟斤拷锟斤拷(4) 锟斤拷锟介線锟斤拷規(gu锟斤拷)锟斤拷锟斤拷锟絵锟节斤拷Q锟斤拷锟紿锟斤拷锟斤拷锟斤拷锟斤拷锟絘(ch锟斤拷n)锟斤拷锟紿锟叫的戯拷(y锟斤拷ng)锟斤拷.锟斤拷锟斤拷锟叫的碉拷(2)(3)(4)锟絚锟斤拷锟斤拷锟斤拷锟斤拷锟絵锟侥勶拷(chu锟斤拷ng)锟斤拷锟絚锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷1锟斤拷 锟絆(sh锟斤拷)锟斤拷锟斤拷(sh锟斤拷)f(θ)=?3?sin?θ+??cos?θ锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷θ锟斤拷锟斤拷c锟絚锟斤拷锟斤拷(bi锟斤拷o)原锟絚锟截合ｏ拷始邊锟絚x锟絊锟斤拷負(f锟斤拷)锟斤拷锟絊锟截猴拷锟斤拷锟終邊锟斤拷(j锟斤拷ng)锟絕锟絚?P(x,y)?锟斤拷锟斤拷0≤θ≤?π?锟斤拷

锟斤拷锟斤拷(1) 锟斤拷锟絚P锟斤拷锟斤拷锟斤拷(bi锟斤拷o)锟斤拷12,32锟斤拷锟斤拷f(θ)锟斤拷值;

锟斤拷锟斤拷(2) 锟斤拷锟絚P(x,y)锟斤拷平锟斤拷^(q锟斤拷)锟斤拷Ω锟斤拷x+y≥1,x≤1,y≤1锟斤拷 锟较碉拷一锟斤拷锟斤拷锟絚锟斤拷試锟絖锟斤拷锟斤拷θ锟斤拷取值锟斤拷锟斤拷锟斤拷锟斤拷锟襟函旓拷(sh锟斤拷)f(θ)锟斤拷锟斤拷小值锟斤拷锟斤拷锟街�锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷(1)锟斤拷只锟斤拷要锟絓锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟侥讹拷锟絰锟斤拷锟斤拷;锟斤拷(2)锟斤拷锟斤拷只要锟饺�锟斤拷锟狡斤拷锟絕(q锟斤拷)锟斤拷Ω锟斤拷锟劫革拷锟斤拷(j锟斤拷)锟介畫锟斤拷锟斤拷平锟斤拷^(q锟斤拷)锟斤拷_锟斤拷锟斤拷θ锟斤拷取值锟斤拷锟斤拷锟斤拷锟組(j锟斤拷n)锟斤拷锟紻(zhu锟斤拷n)锟斤拷锟斤拷锟斤拷f(θ)=a?sin?θ+b?cos?θ锟酵猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷值锟斤拷

锟斤拷锟斤拷锟斤拷 (1) 锟斤拷锟絚P锟斤拷锟斤拷锟斤拷(bi锟斤拷o)锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟侥讹拷锟絰锟缴碉拷?sin?θ=32锟斤拷?cos?θ=12锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷f(θ)=3?sin?θ+??cos?θ=?3×32+12=2锟斤拷

锟斤拷锟斤拷(2) 锟斤拷锟斤拷平锟斤拷^(q锟斤拷)锟斤拷Ω (锟斤拷锟斤拷锟斤拷锟轿區(q锟斤拷)锟斤拷ABC)锟斤拷D锟斤拷示锟斤拷锟斤拷锟斤拷A(1,0)锟斤拷B(1,1)锟斤拷?C(0,1)?.锟斤拷锟斤拷0≤θ≤?π?2,

锟斤拷锟斤拷锟斤拷f(θ)=3?sin?θ+?cos?θ=2?sin?θ+?π?6锟斤拷

锟斤拷锟斤拷锟斤拷?π?6≤θ+??π?6≤?2?π?3锟斤拷

锟斤拷锟斤拷锟绞�锟�(d锟斤拷ng)θ+?π?6=?π?2锟斤拷锟斤拷θ=?π?3锟絩锟斤拷f(θ)取锟斤拷锟斤拷锟街�锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟�2;

锟斤拷锟斤拷锟斤拷(d锟斤拷ng)θ+?π?6=?π?6锟斤拷锟斤拷θ=0锟絩锟斤拷f(θ)取锟斤拷锟斤拷小值锟斤拷锟斤拷锟斤拷小值锟斤拷锟斤拷1锟斤拷

锟斤拷锟斤拷锟絚锟絬 锟斤拷锟絵锟叫碉拷锟斤拷锟斤拷锟斤拷锟絚锟斤拷锟斤拷锟皆斤拷锟斤拷}锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷規(gu锟斤拷)锟斤拷锟叫的伙拷锟紸(ch锟斤拷)锟斤拷(n锟斤拷i)锟斤拷平锟斤拷^(q锟斤拷)锟斤拷锟絚锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷锟斤拷值锟組(j锟斤拷n)锟斤拷锟剿碉拷锟叫機锟紺锟较ｏ拷锟絕去锟絭锟斤拷呖锟斤拷锟斤拷锟斤拷锟揭�(gu锟斤拷)锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟斤拷見锟斤拷

锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

锟斤拷锟斤拷锟竭匡拷锟斤拷(sh锟斤拷)锟絎(xu锟斤拷)知锟絉锟絚锟絉锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟竭★拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

锟竭匡拷锟絩锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚

锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號