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인기 있는 삼각법 >

tanh(1.4)

해법

tanh (1.4)

해법

\frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

+1

소수

0.88535 \dots

솔루션 단계

tanh (1.4)

= tanh (\frac{7}{5})

삼각성을 사용하여 다시 쓰기:

\frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

tanh (\frac{7}{5})

하이퍼볼라식별사용:

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

= \frac{e ^{\frac{7}{5}} - e ^{- \frac{7}{5}}}{e ^{\frac{7}{5}} + e ^{- \frac{7}{5}}}

\frac{e ^{\frac{7}{5}} - e ^{- \frac{7}{5}}}{e ^{\frac{7}{5}} + e ^{- \frac{7}{5}}} = \frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

\frac{e ^{\frac{7}{5}} - e ^{- \frac{7}{5}}}{e ^{\frac{7}{5}} + e ^{- \frac{7}{5}}}

지수 규칙 적용:

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

e^{- \frac{7}{5}} = \frac{1}{e ^{\frac{7}{5}}}

= \frac{e ^{\frac{7}{5}} - \frac{1}{e ^{\frac{7}{5}}}}{e ^{\frac{7}{5}} + \frac{1}{e ^{\frac{7}{5}}}}

e^{\frac{7}{5}} + \frac{1}{e ^{\frac{7}{5}}}

합류하다:

\frac{e ^{\frac{14}{5}} + 1}{e ^{\frac{7}{5}}}

e^{\frac{7}{5}} + \frac{1}{e ^{\frac{7}{5}}}

요소를 분수로 변환:

e^{\frac{7}{5}} = \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}}}{e ^{\frac{7}{5}}}

= \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}}}{e ^{\frac{7}{5}}} + \frac{1}{e ^{\frac{7}{5}}}

분모가 같기 때문에, 분수를 합친다:

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

= \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}} + 1}{e ^{\frac{7}{5}}}

e^{\frac{7}{5}} e^{\frac{7}{5}} + 1 = e^{2 \cdot \frac{7}{5}} + 1

e^{\frac{7}{5}} e^{\frac{7}{5}} + 1

e^{\frac{7}{5}} e^{\frac{7}{5}} = e^{2 \cdot \frac{7}{5}}

e^{\frac{7}{5}} e^{\frac{7}{5}}

지수 규칙 적용:

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

e^{\frac{7}{5}} e^{\frac{7}{5}} = e^{\frac{7}{5} + \frac{7}{5}}

= e^{\frac{7}{5} + \frac{7}{5}}

유사 요소 추가:

\frac{7}{5} + \frac{7}{5} = 2 \cdot \frac{7}{5}

= e^{2 \cdot \frac{7}{5}}

= e^{2 \cdot \frac{7}{5}} + 1

= \frac{e ^{2 \cdot \frac{7}{5}} + 1}{e ^{\frac{7}{5}}}

2 \cdot \frac{7}{5}

곱하다

: \frac{14}{5}

2 \cdot \frac{7}{5}

다중 분수:

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

= \frac{7 \cdot 2}{5}

숫자를 곱하시오:

7 \cdot 2 = 14

= \frac{14}{5}

= \frac{e ^{\frac{14}{5}} + 1}{e ^{\frac{7}{5}}}

= \frac{e ^{\frac{7}{5}} - \frac{1}{e ^{\frac{7}{5}}}}{\frac{e ^{\frac{14}{5}} + 1}{e ^{\frac{7}{5}}}}

e^{\frac{7}{5}} - \frac{1}{e ^{\frac{7}{5}}}

합류하다:

\frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{7}{5}}}

e^{\frac{7}{5}} - \frac{1}{e ^{\frac{7}{5}}}

요소를 분수로 변환:

e^{\frac{7}{5}} = \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}}}{e ^{\frac{7}{5}}}

= \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}}}{e ^{\frac{7}{5}}} - \frac{1}{e ^{\frac{7}{5}}}

분모가 같기 때문에, 분수를 합친다:

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

= \frac{e ^{\frac{7}{5}} e ^{\frac{7}{5}} - 1}{e ^{\frac{7}{5}}}

e^{\frac{7}{5}} e^{\frac{7}{5}} - 1 = e^{2 \cdot \frac{7}{5}} - 1

e^{\frac{7}{5}} e^{\frac{7}{5}} - 1

e^{\frac{7}{5}} e^{\frac{7}{5}} = e^{2 \cdot \frac{7}{5}}

e^{\frac{7}{5}} e^{\frac{7}{5}}

지수 규칙 적용:

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

e^{\frac{7}{5}} e^{\frac{7}{5}} = e^{\frac{7}{5} + \frac{7}{5}}

= e^{\frac{7}{5} + \frac{7}{5}}

유사 요소 추가:

\frac{7}{5} + \frac{7}{5} = 2 \cdot \frac{7}{5}

= e^{2 \cdot \frac{7}{5}}

= e^{2 \cdot \frac{7}{5}} - 1

= \frac{e ^{2 \cdot \frac{7}{5}} - 1}{e ^{\frac{7}{5}}}

2 \cdot \frac{7}{5}

곱하다

: \frac{14}{5}

2 \cdot \frac{7}{5}

다중 분수:

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

= \frac{7 \cdot 2}{5}

숫자를 곱하시오:

7 \cdot 2 = 14

= \frac{14}{5}

= \frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{7}{5}}}

= \frac{\frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{7}{5}}}}{\frac{e ^{\frac{14}{5}} + 1}{e ^{\frac{7}{5}}}}

분수 나누기:

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

= \frac{( e ^{\frac{14}{5}} - 1 ) e ^{\frac{7}{5}}}{e ^{\frac{7}{5}} ( e ^{\frac{14}{5}} + 1 )}

공통 요인 취소:

e^{\frac{7}{5}}

= \frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

= \frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

= \frac{e ^{\frac{14}{5}} - 1}{e ^{\frac{14}{5}} + 1}

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