309
鏁欒偛缃?/p>
www.309edu.com
309
鏁欒偛璧勬簮搴?/p>
www.309edu.com
璇炬椂浣滀笟
(
涓?/p>
)
[
绗竴绔?/p>
2
30
掳锛?/p>
45
掳锛?/p>
60
掳瑙掔殑涓夎鍑芥暟鍊?/p>
]
涓�銆侀�夋嫨棰?/p>
1
锛?018路澶у簡
2cos60
掳锛?/p>
(
)
A
锛?/p>
1 B.
3 C.
2 D.
1
2
2
锛庤绠?/p>
sin
2
40
掳锛?/p>
cos
2
40
掳鐨勫�间负
(
)
A
锛?/p>
0 B.
1
2
C
锛?/p>
1 D
锛?/p>
2
3
锛庡湪鈻?/p>
ABC
涓紝鑻モ垹
C
锛?/p>
90
掳锛?/p>
tan
A
锛?/p>
3
锛屽垯
sin
B
鐨勫�间负
(
)
A
.
3
2
B
.
2
2
C
.
1
2
D
.
3
3
4
锛庡鍥?/p>
K
锛?/p>
3
锛?/p>
1
锛屼互鐐?/p>
O
涓哄渾蹇冿紝浠绘剰闀夸负鍗婂緞鐢诲姬锛屼笌灏勭嚎
OA
浜や簬鐐?/p>
B
锛屽啀浠ョ偣
B
涓哄渾蹇冿紝
BO
闀夸负鍗婂緞鐢诲姬锛屼袱寮т氦浜庣偣
C
锛岀敾灏勭嚎
OC
锛屽垯
cos
鈭?/p>
AOC
鐨勫�间负
(
)
鍥?/p>
K
锛?/p>
3
锛?/p>
1
A
.
1
2
B
.
3
3
C
.
2
2
D
.
3
2
5
锛庡鏋滃湪鈻?/p>
ABC
涓紝鈭?/p>
A
锛屸垹
B
涓洪攼瑙掞紝涓?/p>
sin
A
锛?/p>
cos
B
锛?/p>
2
2
锛岄偅涔堜笅鍒楀鈻?/p>
ABC
鏈�纭垏
鐨勬弿杩版槸
(
)
A
锛庘柍
ABC
鏄洿瑙掍笁瑙掑舰
B
锛庘柍
ABC
鏄瓑鑵颁笁瑙掑舰
C
锛庘柍
ABC
鏄瓑鑵扮洿瑙掍笁瑙掑舰
D
锛庘柍
ABC
鏄攼瑙掍笁瑙掑舰
6
锛庡湪鈻?/p>
ABC
涓紝鈭?/p>
A
锛屸垹
B
鏄攼瑙掞紝涓旀湁
|
tan
B
锛?/p>
3|
锛?/p>
(2
sin
A
锛?/p>
3)
2
锛?/p>
0
锛屽垯鈻?/p>
ABC
鐨?/p>
褰㈢姸鏄?/p>
(
)
閾炬帴鍚渚?/p>
2
褰掔撼鎬荤粨
A
锛庣瓑鑵?/p>
(
闈炵瓑杈?/p>
)
涓夎褰?/p>
B
锛庣洿瑙掍笁瑙掑舰
C
锛庣瓑杈逛笁瑙掑舰
D
锛庣瓑鑵扮洿瑙掍笁瑙掑舰
7
锛庡鍥?/p>
K
锛?/p>
3
锛?/p>
2
锛岄挀楸肩
AC
闀?/p>
6
m
锛岄湶鍦ㄦ按闈笂鐨勯奔绾?/p>
BC
闀?/p>
3
2
m
锛屾煇閽撹�呮兂鐪嬬湅
楸奸挬涓婄殑鎯呭喌锛屾妸楸肩
AC
杞姩鍒?/p>
AC鈥茬殑浣嶇疆锛屾鏃堕湶鍦ㄦ按闈笂鐨勯奔绾?/p>
B
鈥?/p>
C
鈥查暱
3
3
m
锛?/p>
鍒欓奔绔胯浆杩囩殑瑙掑害鏄?/p>
(
)