Mathway | 热门问题

热门问题

等级	主题	问题	格式化的问题
27301	求解函数何时为无定义/不连续	2/(9x)-7/12=3/x	$\frac{2}{9 x} - \frac{7}{12} = \frac{3}{x}$
27302	求解函数何时为无定义/不连续	(2tan(x))/(1+tan(x)^2)=sin(2x)	$\frac{2 \tan (x)}{1 + \tan^{2} (x)} = \sin (2 x)$
27303	求解函数何时为无定义/不连续	(2tan(x))/(sin(2x))=sec(x)^2	$\frac{2 \tan (x)}{\sin (2 x)} = \sec^{2} (x)$
27304	求解函数何时为无定义/不连续	3^(2x)+3^(x+1)-70=0	$3^{2 x} + 3^{x + 1} - 70 = 0$
27305	有理化分母	(sin(x)+tan(x))/(1+cos(x))	$\frac{\sin (x) + \tan (x)}{1 + \cos (x)}$
27306	有理化分母	(sin(x)+tan(x))/(cos(x)+1)	$\frac{\sin (x) + \tan (x)}{\cos (x) + 1}$
27307	求解函数何时为无定义/不连续	x=(2pi)/5	$x = \frac{2 π}{5}$
27308	有理化分母	(sin(x))/(1+sec(x))	$\frac{\sin (x)}{1 + \sec (x)}$
27309	求解函数何时为无定义/不连续	x=-(65pi)/6	$x = - \frac{65 π}{6}$
27310	求解函数何时为无定义/不连续	x=arccos(60/65)	$x = \arccos (\frac{60}{65})$
27311	求解函数何时为无定义/不连续	x=arctan(-15/10)	$x = \arctan (- \frac{15}{10})$
27312	求解函数何时为无定义/不连续	x=-0.9167	$x = - 0.9167$
27313	求解函数何时为无定义/不连续	x=(40pi)/6	$x = \frac{40 π}{6}$
27314	求解函数何时为无定义/不连续	x=-(4pi)/3	$x = - \frac{4 π}{3}$
27315	求解函数何时为无定义/不连续	[0,2pi],tan(x)^2+tan(x)=0	$[0, 2 π] \tan^{2} (x) + \tan (x) = 0$
27316	求解函数何时为无定义/不连续	(3+4i)^2-2(x-yi)=x+yi	${(3 + 4 i)}^{2} - 2 (x - y i) = x + y i$
27317	求解函数何时为无定义/不连续	(tan(73)-tan(13))/(1+tan(73)tan(13)) = square root of B	$\frac{\tan (73) - \tan (13)}{1 + \tan (73) \tan (13)} = \sqrt{B}$
27318	求解函数何时为无定义/不连续	(x+1)^2+(y-2)^2=9	${(x + 1)}^{2} + {(y - 2)}^{2} = 9$
27319	求解函数何时为无定义/不连续	(z-i)/(z-2)=(3i+1)/2	$\frac{z - i}{z - 2} = \frac{3 i + 1}{2}$
27320	求解函数何时为无定义/不连续	(cos(x-1)^2)/(cos(x))=-tan(x)sin(x)	$\frac{\cos^{2} (x - 1)}{\cos (x)} = - \tan (x) \sin (x)$
27321	求解函数何时为无定义/不连续	(cot(x)^2)/(csc(x))=csc(x)-sin(x)	$\frac{\cot^{2} (x)}{\csc (x)} = \csc (x) - \sin (x)$
27322	有理化分母	(1/(cos(x)))/(1+cos(x))	$\frac{\frac{1}{\cos (x)}}{1 + \cos (x)}$
27323	有理化分母	(1/(sec(x)))/(1+sec(x))	$\frac{\frac{1}{\sec (x)}}{1 + \sec (x)}$
27324	有理化分母	(1/(sin(x)))/(1-cos(x))	$\frac{\frac{1}{\sin (x)}}{1 - \cos (x)}$
27325	有理化分母	(cos(x)^2-sin(x)^2)/(1-sin(x)^2)	$\frac{\cos^{2} (x) - \sin^{2} (x)}{1 - \sin^{2} (x)}$
27326	加	sin(40)cos(50)+cos(40)sin(50)	$\sin (40) \cos (50) + \cos (40) \sin (50)$
27327	加	sin(45)cos(45)+cos(45)sin(45)	$\sin (45) \cos (45) + \cos (45) \sin (45)$
27328	加	sin(5)cos(25)+cos(5)sin(25)	$\sin (5) \cos (25) + \cos (5) \sin (25)$
27329	加	sin(50)cos(10)+cos(50)sin(10)	$\sin (50) \cos (10) + \cos (50) \sin (10)$
27330	加	sin(50)cos(40)+cos(50)sin(40)	$\sin (50) \cos (40) + \cos (50) \sin (40)$
27331	加	sin(5x)cos(7x)+cos(5x)sin(7x)	$\sin (5 x) \cos (7 x) + \cos (5 x) \sin (7 x)$
27332	加	sin(6)+sin(25)	$\sin (6) + \sin (25)$
27333	加	sin(arcsin(1/4))+arctan(-4)	$\sin (\arcsin (\frac{1}{4})) + \arctan (- 4)$
27334	加	sin(u)+cot(u)cos(u)	$\sin (u) + \cot (u) \cos (u)$
27335	加	tan(30)+tan(60)	$\tan (30) + \tan (60)$
27336	加	tan(A+B)+tan(A-B)	$\tan (A + B) + \tan (A - B)$
27337	减	sin(x)-cos(x)	$\sin (x) - \cos (x)$
27338	减	sin((19pi)/3)-sin((3pi)/10)	$\sin (\frac{19 π}{3}) - \sin (\frac{3 π}{10})$
27339	减	sin(2/pi)cos(pi/6)-cos(pi/2)sin(pi/6)	$\sin (\frac{2}{π}) \cos (\frac{π}{6}) - \cos (\frac{π}{2}) \sin (\frac{π}{6})$
27340	减	sin((31pi)/36)cos((11pi)/18)-cos((31pi)/36)sin((11pi)/18)	$\sin (\frac{31 π}{36}) \cos (\frac{11 π}{18}) - \cos (\frac{31 π}{36}) \sin (\frac{11 π}{18})$
27341	减	sin((3pi)/7)cos((11pi)/42)-cos((3pi)/7)sin((11pi)/42)	$\sin (\frac{3 π}{7}) \cos (\frac{11 π}{42}) - \cos (\frac{3 π}{7}) \sin (\frac{11 π}{42})$
27342	减	sin(pi/12)-cos(pi/2)	$\sin (\frac{π}{12}) - \cos (\frac{π}{2})$
27343	减	sin(105)cos(45)-cos(105)sin(45)	$\sin (105) \cos (45) - \cos (105) \sin (45)$
27344	减	sin(121)cos(61)-cos(121)sin(61)	$\sin (121) \cos (61) - \cos (121) \sin (61)$
27345	减	sin(144)cos(24)-cos(144)sin(24)	$\sin (144) \cos (24) - \cos (144) \sin (24)$
27346	减	sin(190)cos(10)-cos(190)sin(10)	$\sin (190) \cos (10) - \cos (190) \sin (10)$
27347	减	sin(2)cos(7)-cos(2)sin(7)	$\sin (2) \cos (7) - \cos (2) \sin (7)$
27348	减	sin(20)cos(80)-cos(20)sin(80)	$\sin (20) \cos (80) - \cos (20) \sin (80)$
27349	减	sin(255)cos(15)-cos(255)sin(15)	$\sin (255) \cos (15) - \cos (255) \sin (15)$
27350	减	sin(3x)-sin(x)	$\sin (3 x) - \sin (x)$
27351	减	sin(45)cos(30)-cos(45)sin(30)	$\sin (45) \cos (30) - \cos (45) \sin (30)$
27352	减	sin(5x)-sin(3x)	$\sin (5 x) - \sin (3 x)$
27353	减	sin(52)cos(13)-cos(52)sin(13)	$\sin (52) \cos (13) - \cos (52) \sin (13)$
27354	减	sin(61)cos(19)-cos(61)sin(19)	$\sin (61) \cos (19) - \cos (61) \sin (19)$
27355	减	sin(72)cos(12)-cos(72)sin(12)	$\sin (72) \cos (12) - \cos (72) \sin (12)$
27356	减	sin(75)cos(15)-cos(75)sin(15)	$\sin (75) \cos (15) - \cos (75) \sin (15)$
27357	减	pi/2-pi/3	$\frac{π}{2} - \frac{π}{3}$
27358	减	1-16/25	$1 - \frac{16}{25}$
27359	减	sin(83)cos(83)-cos(83)sin(83)	$\sin (83) \cos (83) - \cos (83) \sin (83)$
27360	减	sin(x)cos(45)-cos(x)sin(45)	$\sin (x) \cos (45) - \cos (x) \sin (45)$
27361	减	sin(x)-sin(2x)	$\sin (x) - \sin (2 x)$
27362	减	tan(pi/4)-sin(pi/6)	$\tan (\frac{π}{4}) - \sin (\frac{π}{6})$
27363	乘	t 的 5 次方根的 4 次方根	$\sqrt[4]{\sqrt[5]{t}}$
27364	以标准式表示	(-3x^2*(7x^2)-8)-(-5x^3+9x^2-8-19)	$(- 3 x^{2} \cdot (7 x^{2}) - 8) - (- 5 x^{3} + 9 x^{2} - 8 - 19)$
27365	有理化分母	(tan((5pi)/18-x)+tan((2pi)/9+x))÷(1-tan((5pi)/18-x)tan((3pi)/9+x))	$(\tan (\frac{5 π}{18} - x) + \tan (\frac{2 π}{9} + x)) \div (1 - \tan (\frac{5 π}{18} - x) \tan (\frac{3 π}{9} + x))$
27366	有理化分母	((sin(8a)-sin(2))*(cos(2a)-cos(8a)))/(1-cos(6a))	$\frac{(\sin (8 a) - \sin (2)) \cdot (\cos (2 a) - \cos (8 a))}{1 - \cos (6 a)}$
27367	有理化分母	(12tan(x))/(1+tan(2(x)))	$\frac{12 \tan (x)}{1 + \tan (2 (x))}$
27368	有理化分母	(cos(x)sin(x))/(1-sin(x))	$\frac{\cos (x) \sin (x)}{1 - \sin (x)}$
27369	有理化分母	(sin(a)cos(a))/(1-sin(a)^2)	$\frac{\sin (a) \cos (a)}{1 - \sin^{2} (a)}$
27370	有理化分母	(cot(x)-tan(x))/(1-2sin(x)^2)	$\frac{\cot (x) - \tan (x)}{1 - 2 \sin^{2} (x)}$
27371	减	-11 21-11 的平方根 21 的平方根	$- 11 \sqrt{21} - 11 \sqrt{21}$
27372	有理化分母	(cot(x)^2)/(1+cot(x)^2)	$\frac{\cot^{2} (x)}{1 + \cot^{2} (x)}$
27373	有理化分母	(csc(-x)^2-1)/(1-cos(-x)^2)	$\frac{\csc^{2} (- x) - 1}{1 - \cos^{2} (- x)}$
27374	有理化分母	(csc(n/2-x)^2)/(1+tan(x)^2)	$\frac{\csc^{2} (\frac{n}{2} - x)}{1 + \tan^{2} (x)}$
27375	有理化分母	(sec(x)^2)/(1-cos(x)^2)	$\frac{\sec^{2} (x)}{1 - \cos^{2} (x)}$
27376	有理化分母	(sin(y)^2)/(1-cos(y))	$\frac{\sin^{2} (y)}{1 - \cos (y)}$
27377	有理化分母	(tan(x)^2-2tan(x)-3)/(tan(x)+1)	$\frac{\tan^{2} (x) - 2 \tan (x) - 3}{\tan (x) + 1}$
27378	有理化分母	(1-tan(x)^2)/(1-tan(x)^4)	$\frac{1 - \tan^{2} (x)}{1 - \tan^{4} (x)}$
27379	有理化分母	(1-tan(x)^2)/(1+tan(x)^2)=cos(2x)	$\frac{1 - \tan^{2} (x)}{1 + \tan^{2} (x)} = \cos (2 x)$
27380	有理化分母	1/(1-csc(x)^2)	$\frac{1}{1 - \csc^{2} (x)}$
27381	有理化分母	(1+cos(x))/(1-cos(x))	$\frac{1 + \cos (x)}{1 - \cos (x)}$
27382	有理化分母	(1+sec(x))/(1-cos(x))	$\frac{1 + \sec (x)}{1 - \cos (x)}$
27383	有理化分母	1/(1+sin(x))	$\frac{1}{1 + \sin (x)}$
27384	有理化分母	1/(1-2sin(x)^2)	$\frac{1}{1 - 2 \sin^{2} (x)}$
27385	有理化分母	1/(1-tan(x))	$\frac{1}{1 - \tan (x)}$
27386	有理化分母	(1+cos(x))/(1+cos(x))	$\frac{1 + \cos (x)}{1 + \cos (x)}$
27387	有理化分母	(sin(x))/(cos(x)+1)*(cos(-1))/(cos(x)-1)	$\frac{\sin (x)}{\cos (x) + 1} \cdot \frac{\cos (- 1)}{\cos (x) - 1}$
27388	有理化分母	(3tan(x))/(1+cos(x))	$\frac{3 \tan (x)}{1 + \cos (x)}$
27389	有理化分母	5/(sec(x)+1)	$\frac{5}{\sec (x) + 1}$
27390	有理化分母	(csc(y)+1)/(csc(y)+1)	$\frac{\csc (y) + 1}{\csc (y) + 1}$
27391	有理化分母	(sec(x))/(1+tan(x)^2)	$\frac{\sec (x)}{1 + \tan^{2} (x)}$
27392	有理化分母	(cos(x))/(1-csc(x))*(1+csc(x))/(1+csc(x))	$\frac{\cos (x)}{1 - \csc (x)} \cdot \frac{1 + \csc (x)}{1 + \csc (x)}$
27393	有理化分母	(cos(x))/(1-csc(x))=0	$\frac{\cos (x)}{1 - \csc (x)} = 0$
27394	有理化分母	(cot(x))/(1+sin(x))	$\frac{\cot (x)}{1 + \sin (x)}$
27395	有理化分母	(csc(b))/(1+cot(b)^2)	$\frac{\csc (b)}{1 + \cot^{2} (b)}$
27396	有理化分母	(1-cos(x))/(1+cos(x))*(sin(x))/(sin(x))	$\frac{1 - \cos (x)}{1 + \cos (x)} \cdot \frac{\sin (x)}{\sin (x)}$
27397	有理化分母	(1-cos(2u))/(1+cos(2u))	$\frac{1 - \cos (2 u)}{1 + \cos (2 u)}$
27398	有理化分母	2/(1-tan(x))	$\frac{2}{1 - \tan (x)}$
27399	有理化分母	(2tan(x))/(1+tan(x)^2)	$\frac{2 \tan (x)}{1 + \tan^{2} (x)}$
27400	有理化分母	(2tan(x/4))/(1-tan(x/4)^2)	$\frac{2 \tan (\frac{x}{4})}{1 - \tan^{2} (\frac{x}{4})}$