鍚笢涓
2018
灞婇珮涓夐珮鑰冭�冨墠杈呭鏁板璇曢
濉┖棰?/p>
銆婄粺璁￠棶棰樸�?/p>
1
锛庡凡鐭ユ�讳綋鐨勫悇涓綋鐨勫�肩敱灏忓埌澶т緷娆′负
2
锛?/p>
3
锛?/p>
3
锛?/p>
7
锛?/p>
a
锛?/p>
b
锛?/p>
12
锛?/p>
13.7
锛?/p>
18.3
锛?/p>
20
锛屼笖鎬讳綋鐨勪腑浣嶆暟
涓?/p>
10.5.
鑻ヨ浣胯鎬讳綋鐨勬柟宸渶灏忥紝鍒?/p>
a=
锛?/p>
b=
銆?/p>
2
锛?/p>
閲囩敤绯荤粺鎶芥牱鏂规硶浠?/p>
960
浜轰腑鎶藉彇
32
浜哄仛闂嵎璋冩煡
,
涓烘灏嗕粬浠殢鏈虹紪鍙蜂负
1,2,960,
鍒嗙粍鍚庡湪绗竴
缁勯噰鐢ㄧ畝鍗曢殢鏈烘娊鏍风殑鏂规硶鎶藉埌鐨勫彿鐮佷负
9.
鎶藉埌鐨?/p>
32
浜轰腑
,
缂栧彿钀藉叆鍖洪棿
飦?/p>
飦?/p>
1,450
鐨勪汉鍋氶棶鍗?/p>
A
,
缂?/p>
鍙疯惤鍏ュ尯闂?/p>
飦?/p>
飦?/p>
451,750
鐨勪汉鍋氶棶鍗?/p>
B
,
鍏朵綑鐨勪汉鍋氶棶鍗?/p>
C
鍒欐娊鍒扮殑浜轰腑
,
鍋氶棶鍗?/p>
B
鐨勪汉鏁颁负
____.
銆婃鐜囬棶棰樸�?/p>
1
锛庡湪鍖洪棿
1
5
,
飪?/p>
飪?/p>
飪?/p>
飪?/p>
鍜?/p>
2
4
,
飪?/p>
飪?/p>
飪?/p>
飪?/p>
鍒嗗埆鍙栦竴涓暟
,
璁颁负
a
b
,
,
鍒欐柟绋?/p>
2
2
2
2
1
x
y
a
b
飥?/p>
飥?/p>
琛ㄧず鐒︾偣鍦?/p>
x
杞翠笂涓旂蹇冪巼灏?/p>
浜?/p>
3
2
鐨勬き鍦嗙殑姒傜巼涓?/p>
锛?/p>
2
锛?/p>
鍦ㄥ渾
=4
鎵�鍥存垚鐨勫尯鍩熷唴闅忔満鍙栦竴涓暣鐐?/p>
P(x,y)
锛?/p>
妯紝
绾靛潗鏍囬兘鏄暣鏁扮偣锛?/p>
锛?/p>
鍒欐弧瓒?
鐨勬暣鐐圭殑姒傜巼涓?/p>
.
銆婁笁瑙掗棶棰樸�?/p>
1
锛庡湪
涓紝
D
涓?/p>
BC
鐨勪腑鐐癸紝鈭燘AD=
,鈭燙AD=
AB=
,
鍒?/p>
AD= .
2
锛庡凡鐭?/p>
sin(
=
(
鍒?/p>
cos
.
3
锛庤嫢
.
4
锛庡湪
ABC
飦?/p>
涓紝鑻?/p>
tanAtanB=tanAtanC+tanctanB
锛屽垯
2
2
2
c
b
a
飥?/p>
= .
5
锛庤嫢瑙?/p>
C
鏄竴涓夎褰㈠唴瑙掞紝鍏充簬
x
鐨勪笉绛夊紡
鐨勮В闆嗕负
锛屽垯瑙?/p>
C
鐨勬渶澶ц
涓?/p>
.
6
锛庡凡鐭?/p>
ABC
飦?/p>
鐨勫唴瑙?/p>
C
B
A
,
,
鐨勫杈?/p>
c
b
a
,
,
鎴愮瓑姣旀暟鍒楋紝鍒?/p>
A
B
sin
sin
鐨勫彇鍊艰寖鍥翠负
銆?/p>
銆婄珛鍑犻棶棰樸�?/p>
1
锛庡凡鐭ュ洓妫遍敟
S-ABCD
鐨勫簳闈?/p>
ABCD
鏄竟闀夸负
2
鐨勬鏂瑰舰锛屼晶闈?/p>
SAB
鏄瓑杈逛笁瑙掑舰锛屼晶闈?/p>
SCD
鏄互
CD
涓烘枩杈圭殑鐩磋涓夎褰紝
E
涓?/p>
CD
鐨勪腑鐐癸紝鍒欎笁妫遍敟
S-AED
鐨勪綋绉?/p>
.
2
锛庤
,
飦?/p>
飦?/p>
涓轰袱涓笉閲嶅悎鐨勫钩闈紝
,
m
n
涓轰袱鏉′笉閲嶅悎鐨勭洿绾匡紝缁欏嚭涓嬪垪鐨勫洓涓懡棰橈細