1
涓撻澶嶄範
瑙ｄ笁瑙掑舰涓庡钩闈㈠悜閲?/p>
1
锛?/p>
涓夎褰㈢殑鏈夊叧鍏紡锛?/p>
(1)
鍦ㄢ柍
ABC
涓細
sin(
A
锛?/p>
B
)
锛?/p>
锛?/p>
sin
A
锛?/p>
B
2
锛?/p>
(2)
姝ｅ鸡瀹氱悊锛?/p>
(3)
浣欏鸡瀹氱悊锛?/p>
_____________________________________________________________________
(4)
闈㈢Н鍏紡锛?/p>
S
锛?/p>
1
2
ah
a
锛?/p>
1
2
ab
sin
C
锛?/p>
1
2
r
(
a
锛?/p>
b
锛?/p>
c
)(
鍏朵腑
r
涓轰笁瑙掑舰鍐呭垏鍦嗗崐寰?/p>
)
锛?/p>
2
锛?/p>
骞抽潰鍚戦噺鐨勬暟閲忕Н
a
路
b
锛?/p>
锛庣壒鍒湴锛?/p>
a
2
锛?/p>
a路
a
锛?/p>
|a|
2
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a
2
.
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胃
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路
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a
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|
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4
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0
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0
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(1)
a路
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锛?/p>
锛?/p>
(2)|
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0
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(4)
a
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b
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路
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锛?/p>
0
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|
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(5)
鑻?/p>
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b
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cos
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锛?/p>
锛?/p>
5
锛?/p>
鈻?/p>
ABC
涓悜閲忓父鐢ㄧ粨璁?/p>
(1)
P
A
鈫?/p>
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PB
鈫?/p>
锛?/p>
PC
鈫?/p>
锛?/p>
0
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P
涓衡柍
ABC
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锛?/p>
(2)
P
A
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锛?/p>
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P
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锛?/p>
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飪?/p>
AB
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|
AB
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|
锛?/p>
AC
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|
AC
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|
(
位
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0)
鎵�鍦ㄧ洿绾胯繃鈻?/p>
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(4)|
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A
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|
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|
PB
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|
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|
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锛?/p>
鑰冪偣涓�
瑙ｄ笁瑙掑舰
渚?/p>
1
锛?/p>
1
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ABC
鐨勪笁涓唴瑙?/p>
A
锛?/p>
B
锛?/p>
C
鎵�瀵圭殑杈瑰垎鍒负
a
锛?/p>
b
锛?/p>
c
锛岃嫢
b
锛?/p>
2
锛?/p>
B
锛?/p>
蟺
3
锛?/p>
C
锛?/p>
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4
锛屽垯鈻?/p>
ABC
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涓?/p>
(
)A
锛?/p>
1
锛?/p>
3
3
B.
3
锛?/p>
1
C
锛?/p>
1
锛?/p>
3
3
D.
3
锛?/p>
1
渚?/p>
1
锛?/p>
2
鈻?/p>
ABC
涓紝宸茬煡
3
b
锛?/p>
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3
a
sin
B
锛岃
A
锛?/p>
B
锛?/p>
C
鎴愮瓑宸暟鍒楋紝鍒欌柍
ABC
鐨勫舰鐘朵负
(
)
A
锛庣洿瑙掍笁瑙掑舰
B
锛庣瓑鑵颁笁瑙掑舰
C
锛庣瓑杈逛笁瑙掑舰
D
锛庣瓑鑵扮洿瑙掍笁瑙掑舰
渚?/p>
1
锛?/p>
3
鑻モ柍
ABC
鐨勪笁涓唴瑙掓弧瓒?/p>
sin
A
鈭?/p>
sin
B
鈭?/p>
sin
C
锛?/p>
5
鈭?/p>
11
鈭?/p>
13
锛屽垯鈻?/p>
ABC
(
)
A
锛庝竴瀹氭槸閿愯涓夎褰?/p>
B
锛庝竴瀹氭槸鐩磋涓夎褰?/p>
C
锛庝竴瀹氭槸閽濊涓夎褰?/p>
D
锛庡彲鑳芥槸閿愯涓夎褰紝涔熷彲鑳芥槸閽濊涓夎褰?/p>
鍙樺紡璁粌
銆?/p>
1
锛?/p>
1
銆?/p>
璁锯柍
ABC
鐨勫唴瑙?/p>
A
锛?/p>
B
锛?/p>
C
鐨勫杈瑰垎鍒负
a
锛?/p>
b
锛?/p>
c
.
鑻?/p>
a
锛?/p>
2
锛?/p>
c
锛?/p>
2
3
锛?/p>
cos
A
锛?/p>
3
2
锛屼笖
b
<
c
锛屽垯
b
锛?/p>
(
)
A
锛?/p>
3
B
锛?/p>
2
2
C
锛?/p>
2
D.
3
銆?/p>
1
锛?/p>
2
銆?/p>
璁锯柍
ABC
鐨勫唴瑙?/p>
A
锛?/p>
B
锛?/p>
C
鎵�瀵圭殑杈瑰垎鍒负
a
锛?/p>
b
锛?/p>
c
锛?/p>
鑻?/p>
b
cos
C
锛?/p>
c
cos
B
锛?/p>
a
sin
A
锛?/p>
鍒欌柍
ABC
鐨勫舰鐘朵负
(
)
A
锛庣洿瑙掍笁瑙掑舰
B
锛庨攼瑙掍笁瑙掑舰
C
锛庨挐瑙掍笁瑙掑舰
D
锛庝笉纭畾
銆?/p>
1
锛?/p>
3
銆?/p>
鍦ㄩ攼瑙掆柍
ABC
涓紝
AB
锛?/p>
3
锛?/p>
AC
锛?/p>
4
锛?/p>
S
鈻?/p>
ABC
锛?/p>
3
3
锛屽垯
BC
锛?/p>
(
)
A
锛?/p>
5
B.
13
鎴?/p>
37
C.
37
D.
13
渚?/p>
1
锛?/p>
4
宸茬煡
A
銆?/p>
B
銆?/p>
C
鍒嗗埆涓衡柍
ABC
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a
銆?/p>
b
銆?/p>
c
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m
锛?/p>
(sin
A
锛?/p>
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B
)
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n
锛?/p>
(cos
B
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cos
A
)
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涓?/p>
m
路
n
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C
.
(1)
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C
鐨勫ぇ灏忥紱
(2)
鑻?/p>
sin
A
锛?/p>
sin
C
锛?/p>
sin
B
鎴愮瓑宸暟鍒楋紝涓?/p>
CA
鈫?/p>
路
(
AB
鈫?/p>
锛?/p>
AC
鈫?
)
锛?/p>
18
锛屾眰杈?/p>
c
鐨勯暱锛?/p>
鍙樺紡璁粌
銆?/p>
1
锛?/p>
4
銆?/p>
(2015路
鍏板窞璇婃柇
)
鍦ㄢ柍
ABC
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A
锛?/p>
B
锛?/p>
C
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a
锛?/p>
b
锛?/p>
c
锛屽凡鐭?/p>
a
3cos
A
锛?/p>
c
sin
C
.
(1)
姹?/p>
A
鐨勫ぇ灏忥紱
(2)
鑻?/p>
a
锛?/p>
6
锛屾眰
b
锛?/p>
c
鐨勫彇鍊艰寖鍥达紟
銆?/p>
1
锛?/p>
5
銆?/p>
(2014路
榛勫唸妯℃嫙
)
鈻?/p>
ABC
鐨勫鎺ュ渾鐨勭洿寰勪负
1
锛屼笁涓唴瑙?/p>
A
銆?/p>
B
銆?/p>
C
鐨勫杈逛负
a
銆?/p>
b
銆?/p>
c
锛?/p>
m
锛?/p>
(
a
锛?/p>
cos
B
)
锛?/p>
n
锛?/p>
(cos
A
锛岋紞
b
)
锛?/p>
a
鈮?/p>
b
锛屽凡鐭?/p>
m
鈯?/p>
n
.(1)
姹?/p>
sin
A
锛?/p>
sin
B
鐨勫彇鍊艰寖鍥达紱
(2)
鑻?/p>
abx
锛?/p>
a
锛?/p>
b
锛岃瘯纭畾瀹炴暟
x
鐨勫彇鍊艰寖鍥达紟