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受欢迎的三角函数 >

tanh(0.5)

解答

tanh (0.5)

解答

\frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

+1

十进制

0.46211 \dots

求解步骤

tanh (0.5)

= tanh (\frac{1}{2})

使用三角恒等式改写:

\frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

tanh (\frac{1}{2})

使用双曲函数恒等式:

tanh (x) = \frac{e ^{x} - e ^{- x}}{e ^{x} + e ^{- x}}

= \frac{e ^{\frac{1}{2}} - e ^{- \frac{1}{2}}}{e ^{\frac{1}{2}} + e ^{- \frac{1}{2}}}

\frac{e ^{\frac{1}{2}} - e ^{- \frac{1}{2}}}{e ^{\frac{1}{2}} + e ^{- \frac{1}{2}}} = \frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

\frac{e ^{\frac{1}{2}} - e ^{- \frac{1}{2}}}{e ^{\frac{1}{2}} + e ^{- \frac{1}{2}}}

使用指数法则:

a^{- b} = \frac{1}{a ^{b}}

e^{- \frac{1}{2}} = \frac{1}{e}

= \frac{e ^{\frac{1}{2}} - \frac{1}{e}}{e ^{\frac{1}{2}} + \frac{1}{e}}

化简

e^{\frac{1}{2}} + \frac{1}{e} : \frac{e ^{\frac{1}{2}} e + 1}{e}

e^{\frac{1}{2}} + \frac{1}{e}

将项转换为分式:

e^{\frac{1}{2}} = \frac{e ^{\frac{1}{2}} e}{e}

= \frac{e ^{\frac{1}{2}} e}{e} + \frac{1}{e}

因为分母相等，所以合并分式:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{e ^{\frac{1}{2}} e + 1}{e}

= \frac{e ^{\frac{1}{2}} - \frac{1}{e}}{\frac{e ^{\frac{1}{2}} e + 1}{e}}

化简

e^{\frac{1}{2}} - \frac{1}{e} : \frac{e ^{\frac{1}{2}} e - 1}{e}

e^{\frac{1}{2}} - \frac{1}{e}

将项转换为分式:

e^{\frac{1}{2}} = \frac{e ^{\frac{1}{2}} e}{e}

= \frac{e ^{\frac{1}{2}} e}{e} - \frac{1}{e}

因为分母相等，所以合并分式:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{e ^{\frac{1}{2}} e - 1}{e}

= \frac{\frac{e ^{\frac{1}{2}} e - 1}{e}}{\frac{e ^{\frac{1}{2}} e + 1}{e}}

分式相除:

\frac{\frac{a}{b}}{\frac{c}{d}} = \frac{a \cdot d}{b \cdot c}

= \frac{( e ^{\frac{1}{2}} e - 1 ) e}{e ( e ^{\frac{1}{2}} e + 1 )}

约分:

e

= \frac{e ^{\frac{1}{2}} e - 1}{e ^{\frac{1}{2}} e + 1}

\frac{e ^{\frac{1}{2}} e - 1}{e ^{\frac{1}{2}} e + 1}

有理化:

\frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

\frac{e ^{\frac{1}{2}} e - 1}{e ^{\frac{1}{2}} e + 1}

乘以共轭根式

\frac{e ^{\frac{1}{2}} e - 1}{e ^{\frac{1}{2}} e - 1}

= \frac{( e ^{\frac{1}{2}} e - 1 ) ( e ^{\frac{1}{2}} e - 1 )}{( e ^{\frac{1}{2}} e + 1 ) ( e ^{\frac{1}{2}} e - 1 )}

(e^{\frac{1}{2}} e - 1) (e^{\frac{1}{2}} e - 1) = e^{2} - 2 e^{\frac{1}{2}} e + 1

(e^{\frac{1}{2}} e - 1) (e^{\frac{1}{2}} e - 1)

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

(e^{\frac{1}{2}} e - 1) (e^{\frac{1}{2}} e - 1) = (e^{\frac{1}{2}} e - 1)^{1 + 1}

= (e^{\frac{1}{2}} e - 1)^{1 + 1}

数字相加:

1 + 1 = 2

= (e^{\frac{1}{2}} e - 1)^{2}

使用完全平方公式:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

a = e^{\frac{1}{2}} e, b = 1

= (e^{\frac{1}{2}} e)^{2} - 2 e^{\frac{1}{2}} e \cdot 1 + 1^{2}

化简

(e^{\frac{1}{2}} e)^{2} - 2 e^{\frac{1}{2}} e \cdot 1 + 1^{2} : e^{2} - 2 e^{\frac{1}{2}} e + 1

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

使用法则

1^{a} = 1

1^{2} = 1

= (e^{\frac{1}{2}} e)^{2} - 2 \cdot 1 \cdot e^{\frac{1}{2}} e + 1

(e^{\frac{1}{2}} e)^{2} = e^{2}

(e^{\frac{1}{2}} e)^{2}

使用指数法则:

(a \cdot b)^{n} = a^{n} b^{n}

= (e)^{2} (e^{\frac{1}{2}})^{2}

(e^{\frac{1}{2}})^{2} : e

使用指数法则:

(a^{b})^{c} = a^{b c}

= e^{\frac{1}{2} \cdot 2}

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

\frac{1}{2} \cdot 2

分式相乘:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

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

约分:

2

= 1

= e

= e (e)^{2}

(e)^{2} : e

使用根式运算法则:

a = a^{\frac{1}{2}}

= (e^{\frac{1}{2}})^{2}

使用指数法则:

(a^{b})^{c} = a^{b c}

= e^{\frac{1}{2} \cdot 2}

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

\frac{1}{2} \cdot 2

分式相乘:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

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

约分:

2

= 1

= e

= ee

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

ee = e^{1 + 1}

= e^{1 + 1}

数字相加:

1 + 1 = 2

= e^{2}

2 e^{\frac{1}{2}} e \cdot 1 = 2 e^{\frac{1}{2}} e

2 e^{\frac{1}{2}} e \cdot 1

数字相乘:

2 \cdot 1 = 2

= 2 e^{\frac{1}{2}} e

= e^{2} - 2 e^{\frac{1}{2}} e + 1

= e^{2} - 2 e^{\frac{1}{2}} e + 1

(e^{\frac{1}{2}} e + 1) (e^{\frac{1}{2}} e - 1) = e^{2} - 1

(e^{\frac{1}{2}} e + 1) (e^{\frac{1}{2}} e - 1)

e^{\frac{1}{2}} e = e

e^{\frac{1}{2}} e

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

e^{\frac{1}{2}} e = e^{\frac{1}{2}} e^{\frac{1}{2}} = e^{\frac{1}{2} + \frac{1}{2}}

= e^{\frac{1}{2} + \frac{1}{2}}

同类项相加:

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

= e^{2 \cdot \frac{1}{2}}

乘

2 \cdot \frac{1}{2} : 1

2 \cdot \frac{1}{2}

分式相乘:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

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

约分:

2

= 1

= e^{1}

使用法则

a^{1} = a

= e

= (e + 1) (e^{\frac{1}{2}} e - 1)

e^{\frac{1}{2}} e = e

e^{\frac{1}{2}} e

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

e^{\frac{1}{2}} e = e^{\frac{1}{2}} e^{\frac{1}{2}} = e^{\frac{1}{2} + \frac{1}{2}}

= e^{\frac{1}{2} + \frac{1}{2}}

同类项相加:

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

= e^{2 \cdot \frac{1}{2}}

乘

2 \cdot \frac{1}{2} : 1

2 \cdot \frac{1}{2}

分式相乘:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

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

约分:

2

= 1

= e^{1}

使用法则

a^{1} = a

= e

= (e + 1) (e - 1)

使用平方差公式:

(a + b) (a - b) = a^{2} - b^{2}

a = e, b = 1

= e^{2} - 1^{2}

使用法则

1^{a} = 1

1^{2} = 1

= e^{2} - 1

= \frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

= \frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

= \frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

= \frac{e ^{2} - 2 e ^{\frac{1}{2}} e + 1}{e ^{2} - 1}

流行的例子

cos(arctan(3/4)-arccos(7/25))

cos (arctan (\frac{3}{4}) - arccos (\frac{7}{25}))

sin(75)-sin(165)

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\frac{1}{cos ( 12 0 ^{\circ} )}

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