secx³怎么化简，或者原函数是什么？ secx的原函数是什么
secx\u7684\u539f\u51fd\u6570\u662f\u4ec0\u4e48\uff1fsecx\u7684\u539f\u51fd\u6570\u4e3a\uff1aln|secx+tanx|+C
\u5206\u6790\u8fc7\u7a0b\u5982\u4e0b\uff1a
\u6c42secx\u7684\u539f\u51fd\u6570\uff0c\u5c31\u662f\u5bf9secx\u4e0d\u5b9a\u79ef\u5206\u3002
\u222bsecx
=\u222bsecx(secx+tanx)dx/(secx+tanx)
=\u222b(sec²x+tanxsecx)dx/(secx+tanx)
=\u222bd(tanx+secx)/(secx+tanx)
=ln|secx+tanx|+C
\u6269\u5c55\u8d44\u6599\uff1a
\u5206\u90e8\u79ef\u5206\uff1a
(uv)'=u'v+uv'
\u5f97\uff1au'v=(uv)'-uv'
\u4e24\u8fb9\u79ef\u5206\u5f97\uff1a\u222b
u'v
dx=\u222b
(uv)'
dx
-
\u222b
uv'
dx
\u5373\uff1a\u222b
u'v
dx
=
uv
-
\u222b
uv'
d,\u8fd9\u5c31\u662f\u5206\u90e8\u79ef\u5206\u516c\u5f0f
\u4e5f\u53ef\u7b80\u5199\u4e3a\uff1a\u222b
v
du
=
uv
-
\u222b
u
dv
\u4e0d\u5b9a\u79ef\u5206\u7684\u516c\u5f0f
1\u3001\u222b
a
dx
=
ax
+
C\uff0ca\u548cC\u90fd\u662f\u5e38\u6570
2\u3001\u222b
x^a
dx
=
[x^(a
+
1)]/(a
+
1)
+
C\uff0c\u5176\u4e2da\u4e3a\u5e38\u6570\u4e14
a
\u2260
-1
3\u3001\u222b
1/x
dx
=
ln|x|
+
C
4\u3001\u222b
a^x
dx
=
(1/lna)a^x
+
C\uff0c\u5176\u4e2da
>
0
\u4e14
a
\u2260
1
5\u3001\u222b
e^x
dx
=
e^x
+
C
6\u3001\u222b
cosx
dx
=
sinx
+
C
7\u3001\u222b
sinx
dx
=
-
cosx
+
C
8\u3001\u222b
cotx
dx
=
ln|sinx|
+
C
=
-
ln|cscx|
+
C
绛旓細secx=1/cosx銆俿ecx鏄鍓插嚱鏁帮紝涓虹洿瑙掍笁瑙掑舰鏂滆竟涓庢煇涓攼瑙掔殑閭昏竟鐨勬瘮锛屽湪鏁板间笂绛変簬浣欏鸡鍑芥暟鐨勫掓暟銆傛鍓插嚱鏁板嚱鏁版ц川锛1銆佸畾涔夊煙锛寈涓嶈兘鍙90搴︼紝270搴︼紝-90搴︼紝-270搴︾瓑鍊煎嵆涓簕x|x鈮爇蟺+蟺/2锛宬鈭圸}銆2銆佸煎煙锛宻ecx鈮1鎴杝ecx鈮わ紞1锛屽嵆涓猴紙-鈭,-1]鈭猍1,+鈭)銆3銆 y=secx鏄伓鍑芥暟...
绛旓細secx=1/cosx锛宻ec²x=1+tan²x锛宻ecxcosx=1锛宼anx=sinxsecx銆傛鍓诧紙sec锛夋槸涓夎鍑芥暟鐨勪竴绉嶃傚畠鐨勫畾涔夊煙涓嶆槸鏁翠釜瀹炴暟闆嗭紝鍊煎煙鏄粷瀵瑰煎ぇ浜庣瓑浜庝竴鐨勫疄鏁般傚畠鏄懆鏈熷嚱鏁帮紝鍏舵渶灏忔鍛ㄦ湡涓2蟺銆倅=secx鐨勬ц川锛(1)瀹氫箟鍩,{x|x鈮爇蟺+蟺/2锛宬鈭圸}銆(2)鍊煎煙,|secx|鈮1锛庡嵆secx鈮1...
绛旓細sec涓轰笁瑙掑嚱鏁帮紝绉颁负姝ｅ壊鍑芥暟銆傛槸鐩磋涓夎褰㈡枩杈逛笌鏌愪釜閿愯鐨勯偦杈圭殑姣旓紝涓庝綑寮︿簰涓哄掓暟锛屽嵆secx=1/cosx銆傚鏋滄妸杩欎釜寮忓瓙閲岀殑1=sinx^2+cosx^2浠ｅ叆鐨勮瘽锛屽彲浠ュ緱鍒皊ecx=sinxtanx+cosx銆俿ecx绛変簬1/cosx銆俿ecx鏄鍓插嚱鏁帮紝涓虹洿瑙掍笁瑙掑舰鏂滆竟涓庢煇涓攼瑙掔殑閭昏竟鐨勬瘮锛屽湪鏁板间笂绛変簬浣欏鸡鍑芥暟鐨勫掓暟銆傛煇鐩磋涓夎...
绛旓細cscx鏄痵inx鐨勫掓暟锛屽嵆cscx=1/sinx銆secx鏄痗osx鐨勫掓暟锛屽嵆secx=1/cosx銆佷笁瑙掑嚱鏁版槸鍩烘湰鍒濈瓑鍑芥暟涔嬩竴锛屾槸浠ヨ搴︿负鑷彉閲忥紝瑙掑害瀵瑰簲浠绘剰瑙掔粓杈逛笌鍗曚綅鍦嗕氦鐐瑰潗鏍囨垨鍏舵瘮鍊间负鍥犲彉閲忕殑鍑芥暟銆備篃鍙互绛変环鍦扮敤涓庡崟浣嶅渾鏈夊叧鐨勫悇绉嶇嚎娈电殑闀垮害鏉ュ畾涔夈備笁瑙掑嚱鏁板湪鐮旂┒涓夎褰㈠拰鍦嗙瓑鍑犱綍褰㈢姸鐨勬ц川鏃舵湁閲嶈浣滅敤锛屼篃鏄爺绌...
绛旓細sec x=x鍦ㄧ洿瑙掍笁瑙掑舰涓殑鏂滆竟涓庨偦杈圭殑姣斿笺備笖杩樻湁secx=1/cosx 1+(tanx)^2=(secx)^2 sec(伪/2)=卤鈭歔(2sec伪/(sec伪+1)] csc(伪/2)=卤鈭歔(2sec伪/(sec伪-1)]
绛旓細secx=1/cosx锛宻ec²x=1+tan²x锛宻ecxcosx=1锛宼anx=sinxsecx銆傛鍓诧紙sec锛夋槸涓夎鍑芥暟鐨勪竴绉嶃傚畠鐨勫畾涔夊煙涓嶆槸鏁翠釜瀹炴暟闆嗭紝鍊煎煙鏄粷瀵瑰煎ぇ浜庣瓑浜庝竴鐨勫疄鏁般傚畠鏄懆鏈熷嚱鏁帮紝鍏舵渶灏忔鍛ㄦ湡涓2蟺銆俿ecx绛変簬澶氬皯 sec涓虹洿瑙掍笁瑙掑舰鏂滆竟涓庢煇涓攼瑙掔殑閭昏竟鐨勬瘮锛屼笌浣欏鸡浜掍负鍊掓暟锛屽嵆secx=1/cosx锛...
绛旓細secx鏄鍓插嚱鏁般俥cx鏄鍓茬殑鎰忔濓紝姝ｅ壊鎵灞炵幇浠ｈ瘝锛屾寚鐨勬槸鐩磋涓夎褰紝鏂滆竟涓庢煇涓攼瑙掔殑閭昏竟鐨勬瘮锛岃閿愯鐨勬鍓诧紝鐢╯ec琛ㄧず銆傛鍓叉槸浣欏鸡鍑芥暟鐨勫掓暟锛屽嚭鐜板湪澶у鏈鏁欐潗楂樼瓑鏁板閮ㄥ垎銆傚湪y=secx涓紝浠鐨勪换涓浣縮ecx鏈夋剰涔夌殑鍊间笌瀹冨搴旂殑y鍊间綔涓猴紙x锛寉)銆傛鍓层佷綑鍓层佹寮︺佷綑寮︺佹鍒囥佷綑鍒囦箣闂寸殑...
绛旓細secx绛変簬1/cosx銆傚洜涓簊ecx鏄鍓插嚱鏁帮紝姝ｅ壊鍑芥暟涓虹洿瑙掍笁瑙掑舰鏂滆竟涓庢煇涓攼瑙掔殑閭昏竟鐨勬瘮锛屽湪鏁板间笂绛変簬浣欏鸡鍑芥暟鐨勫掓暟锛屽嵆secx=1/cosx銆傚湪鍗曚綅鍦嗕笂锛屾鍓插嚱鏁颁綅浜庡壊绾夸笂锛屾墍浠ュ皢姝ゅ嚱鏁板懡鍚嶄负姝ｅ壊鍑芥暟銆傛鍓叉洸绾匡細姝ｅ壊鍑芥暟鍥惧儚锛堝煎煙锛(-鈭,-1]鈭猍1,+鈭)锛夊湪y=secx涓紝浠鐨勪换涓浣縮ecx鏈夋剰涔夌殑鍊间笌...
绛旓細secx鏄伓鍑芥暟銆傚鍑芥暟鏈夛細1銆佹寮﹀嚱鏁帮紙y=sinx锛夋槸濂囧嚱鏁般2銆佹鍒囧嚱鏁帮紙y=tanx锛夋槸濂囧嚱鏁般3銆佷綑鍒囧嚱鏁帮紙y=cotx锛夋槸濂囧嚱鏁般4銆佷綑鍓插嚱鏁帮紙y=cscx锛夋槸濂囧嚱鏁般傚伓鍑芥暟鏈夛細1銆佷綑寮﹀嚱鏁帮紙y=cosx锛夋槸鍋跺嚱鏁般2銆佹鍓插嚱鏁帮紙y=secx锛夋槸鍋跺嚱鏁般傚嚱鏁扮殑濂囧伓鎬ц川锛氫袱涓伓鍑芥暟鐩稿姞鎵寰楃殑鍜屼负鍋跺嚱鏁帮紝涓...
绛旓細adj. 鍓茬殑锛涘垏鐨勶紱浜ゅ樊鐨 n. 鍓茬嚎锛涙鍒 A new damping estimation method, the secant line method, was presented, that is based on the distance of neighbor peaks and valley of oscillation.鎽樿鎻愬嚭鍒╃敤鐩搁偦娉㈠嘲鍜屾尝璋蜂箣闂磋窛绂讳及璁￠樆灏兼瘮鐨勫壊绾挎柟娉曘倅=secx鐨勬ц川 1銆佸畾涔夊煙,{x|x鈮爇蟺+...
