zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的三角函数 >

arctan(x^2-2x)=0

解答

arctan (x^{2} - 2 x) = 0

解答

x = 2, x = 0

求解步骤

arctan (x^{2} - 2 x) = 0

使用反三角函数性质

arctan (x^{2} - 2 x) = 0

arctan (x) = a \Rightarrow x = tan (a)

x^{2} - 2 x = tan (0)

tan (0) = 0

tan (0)

使用以下普通恒等式:

tan (0) = 0

tan (0)

tan (x)

周期表（周期为

πn

）：

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

= 0

= 0

x^{2} - 2 x = 0

x^{2} - 2 x = 0

解

x^{2} - 2 x = 0 : x = 2, x = 0

x^{2} - 2 x = 0

使用求根公式求解

x^{2} - 2 x = 0

二次方程求根公式:

若

a = 1, b = - 2, c = 0

x_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

x_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 2)^{2} - 4 \cdot 1 \cdot 0 = 2

(- 2)^{2} - 4 \cdot 1 \cdot 0

使用指数法则:

(- a)^{n} = a^{n},

若

n

是偶数

(- 2)^{2} = 2^{2}

= 2^{2} - 4 \cdot 1 \cdot 0

使用法则

0 \cdot a = 0

= 2^{2} - 0

2^{2} - 0 = 2^{2}

= 2^{2}

使用根式运算法则:

n a^{n} = a,

假定

a \geq 0

= 2

x_{1, 2} = \frac{- ( - 2 ) \pm 2}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 2 ) + 2}{2 \cdot 1}, x_{2} = \frac{- ( - 2 ) - 2}{2 \cdot 1}

x = \frac{- ( - 2 ) + 2}{2 \cdot 1} : 2

\frac{- ( - 2 ) + 2}{2 \cdot 1}

使用法则

- (- a) = a

= \frac{2 + 2}{2 \cdot 1}

数字相加:

2 + 2 = 4

= \frac{4}{2 \cdot 1}

数字相乘:

2 \cdot 1 = 2

= \frac{4}{2}

数字相除:

\frac{4}{2} = 2

= 2

x = \frac{- ( - 2 ) - 2}{2 \cdot 1} : 0

\frac{- ( - 2 ) - 2}{2 \cdot 1}

使用法则

- (- a) = a

= \frac{2 - 2}{2 \cdot 1}

数字相减:

2 - 2 = 0

= \frac{0}{2 \cdot 1}

数字相乘:

2 \cdot 1 = 2

= \frac{0}{2}

使用法则

\frac{0}{a} = 0, a \neq = 0

= 0

二次方程组的解是:

x = 2, x = 0

x = 2, x = 0

作图

流行的例子

sin(x)=(6.57*10^{-7})/(1.8*10^{-6)}

sin (x^{\circ}) = \frac{6.57 \cdot 1 0 ^{- 7}}{1.8 \cdot 1 0 ^{- 6}}

3sin^2(x)+cos^2(x)=3sin(x)

3 sin^{2} (x) + cos^{2} (x) = 3 sin (x)

solvefor y,xtan(y)-x^2sin(x)+3x^3=0

so l v e f or y, x tan (y) - x^{2} sin (x) + 3 x^{3} = 0

(((1-sin^2(x)))/((1+2*sin^2(x))))=0.45

(\frac{( 1 - sin ^{2} ( x ) )}{( 1 + 2 \cdot sin ^{2} ( x ) )}) = 0.45

- 5 sin (t) = 0