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شائع علم المثلثات >

sqrt((9.8(10))/(2pi)tanh(2pi 8/10))

الحلّ

\frac{9.8 ( 10 )}{2 π} tanh (2 π \frac{8}{10})

الحلّ

\frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

عشري

3.94915 \dots

خطوات الحلّ

\frac{9.8 ( 10 )}{2 π} tanh (2 π \frac{8}{10})

= \frac{\frac{49}{5} \cdot 10}{2 π} tanh (2 π \frac{8}{10})

بسّط:

2 π \frac{8}{10} = \frac{8 π}{5}

2 π \frac{8}{10}

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

:اضرب كسور

= \frac{8 \cdot 2 π}{10}

8 \cdot 2 = 16 :

اضرب الأعداد

= \frac{16 π}{10}

2 :

إلغ العوامل المشتركة

= \frac{8 π}{5}

\frac{\frac{49}{5} \cdot 10}{2 π} tanh (\frac{8 π}{5}) = \frac{7 π tanh ( \frac{8 π}{5} )}{π}

\frac{\frac{49}{5} \cdot 10}{2 π} tanh (\frac{8 π}{5})

\frac{\frac{49}{5} \cdot 10}{2 π} tanh (\frac{8 π}{5})

اضرب بـ:

\frac{49 tanh ( \frac{8 π}{5} )}{π}

\frac{\frac{49}{5} \cdot 10}{2 π} tanh (\frac{8 π}{5})

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

:اضرب كسور

= \frac{\frac{49}{5} \cdot 10 tanh ( \frac{8 π}{5} )}{2 π}

\frac{49}{5} \cdot 10 tanh (\frac{8 π}{5})

اضرب بـ:

98 tanh (\frac{8 π}{5})

\frac{49}{5} \cdot 10 tanh (\frac{8 π}{5})

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

:اضرب كسور

= \frac{49 \cdot 10 tanh ( \frac{8 π}{5} )}{5}

49 \cdot 10 = 490 :

اضرب الأعداد

= \frac{490 tanh ( \frac{8 π}{5} )}{5}

\frac{490}{5} = 98 :

اقسم الأعداد

= 98 tanh (\frac{8 π}{5})

= \frac{98 tanh ( \frac{8 π}{5} )}{2 π}

\frac{98}{2} = 49 :

اقسم الأعداد

= \frac{49 tanh ( \frac{8 π}{5} )}{π}

= \frac{49 tanh ( \frac{8 π}{5} )}{π}

a \geq 0, b \geq 0

بافتراض أنّ

:فعّل قانون الجذور

= \frac{49 tanh ( \frac{8 π}{5} )}{π}

a \geq 0, b \geq 0

بافتراض أنّ

:فعّل قانون الجذور

49 tanh (\frac{8 π}{5}) = 49 tanh (\frac{8 π}{5})

= \frac{49 tanh ( \frac{8 π}{5} )}{π}

49 = 7

49

49 = 7^{2} :

حلّل العدد لعوامله أوّليّة

= 7^{2}

:فعْل قانون الجذور

7^{2} = 7

= 7

= \frac{7 tanh ( \frac{8 π}{5} )}{π}

\frac{7 tanh ( \frac{8 π}{5} )}{π}

حوّل لصيغة عدد كسريّ:

\frac{7 π tanh ( \frac{8 π}{5} )}{π}

\frac{7 tanh ( \frac{8 π}{5} )}{π}

\frac{π}{π}

اضرب بالمرافق

= \frac{7 tanh ( \frac{8 π}{5} ) π}{π π}

π π = π

π π

a a = a

:فعْل قانون الجذور

π π = π

= π

= \frac{7 π tanh ( \frac{8 π}{5} )}{π}

= \frac{7 π tanh ( \frac{8 π}{5} )}{π}

= \frac{7 π tanh ( \frac{8 π}{5} )}{π}

Rewrite using trig identities:

tanh (\frac{8 π}{5}) = \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

tanh (\frac{8 π}{5})

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

:Use the Hyperbolic identity

= \frac{e ^{\frac{8 π}{5}} - e ^{- \frac{8 π}{5}}}{e ^{\frac{8 π}{5}} + e ^{- \frac{8 π}{5}}}

\frac{e ^{\frac{8 π}{5}} - e ^{- \frac{8 π}{5}}}{e ^{\frac{8 π}{5}} + e ^{- \frac{8 π}{5}}} = \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

\frac{e ^{\frac{8 π}{5}} - e ^{- \frac{8 π}{5}}}{e ^{\frac{8 π}{5}} + e ^{- \frac{8 π}{5}}}

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

:فعّل قانون القوى

e^{- \frac{8 π}{5}} = \frac{1}{e ^{\frac{8 π}{5}}}

= \frac{e ^{\frac{8 π}{5}} - \frac{1}{e ^{\frac{8 π}{5}}}}{e ^{\frac{8 π}{5}} + \frac{1}{e ^{\frac{8 π}{5}}}}

e^{\frac{8 π}{5}} + \frac{1}{e ^{\frac{8 π}{5}}}

وحّد:

\frac{e ^{\frac{16 π}{5}} + 1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} + \frac{1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} = \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}}}{e ^{\frac{8 π}{5}}}

:حوّل الأعداد لكسور

= \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}}}{e ^{\frac{8 π}{5}}} + \frac{1}{e ^{\frac{8 π}{5}}}

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

:بما أنّ المقامات متساوية، اجمع البسوط

= \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}} + 1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} + 1 = e^{2 \cdot \frac{8 π}{5}} + 1

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} + 1

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} = e^{2 \cdot \frac{8 π}{5}}

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}}

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

:فعّل قانون القوى

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} = e^{\frac{8 π}{5} + \frac{8 π}{5}}

= e^{\frac{8 π}{5} + \frac{8 π}{5}}

\frac{8 π}{5} + \frac{8 π}{5} = 2 \cdot \frac{8 π}{5} :

اجمع العناصر المتشابهة

= e^{2 \cdot \frac{8 π}{5}}

= e^{2 \cdot \frac{8 π}{5}} + 1

= \frac{e ^{2 \cdot \frac{8 π}{5}} + 1}{e ^{\frac{8 π}{5}}}

2 \cdot \frac{8 π}{5}

اضرب بـ:

\frac{16 π}{5}

2 \cdot \frac{8 π}{5}

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

:اضرب كسور

= \frac{8 π 2}{5}

8 \cdot 2 = 16 :

اضرب الأعداد

= \frac{16 π}{5}

= \frac{e ^{\frac{16 π}{5}} + 1}{e ^{\frac{8 π}{5}}}

= \frac{e ^{\frac{8 π}{5}} - \frac{1}{e ^{\frac{8 π}{5}}}}{\frac{e ^{\frac{16 π}{5}} + 1}{e ^{\frac{8 π}{5}}}}

e^{\frac{8 π}{5}} - \frac{1}{e ^{\frac{8 π}{5}}}

وحّد:

\frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} - \frac{1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} = \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}}}{e ^{\frac{8 π}{5}}}

:حوّل الأعداد لكسور

= \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}}}{e ^{\frac{8 π}{5}}} - \frac{1}{e ^{\frac{8 π}{5}}}

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

:بما أنّ المقامات متساوية، اجمع البسوط

= \frac{e ^{\frac{8 π}{5}} e ^{\frac{8 π}{5}} - 1}{e ^{\frac{8 π}{5}}}

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} - 1 = e^{2 \cdot \frac{8 π}{5}} - 1

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} - 1

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} = e^{2 \cdot \frac{8 π}{5}}

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}}

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

:فعّل قانون القوى

e^{\frac{8 π}{5}} e^{\frac{8 π}{5}} = e^{\frac{8 π}{5} + \frac{8 π}{5}}

= e^{\frac{8 π}{5} + \frac{8 π}{5}}

\frac{8 π}{5} + \frac{8 π}{5} = 2 \cdot \frac{8 π}{5} :

اجمع العناصر المتشابهة

= e^{2 \cdot \frac{8 π}{5}}

= e^{2 \cdot \frac{8 π}{5}} - 1

= \frac{e ^{2 \cdot \frac{8 π}{5}} - 1}{e ^{\frac{8 π}{5}}}

2 \cdot \frac{8 π}{5}

اضرب بـ:

\frac{16 π}{5}

2 \cdot \frac{8 π}{5}

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

:اضرب كسور

= \frac{8 π 2}{5}

8 \cdot 2 = 16 :

اضرب الأعداد

= \frac{16 π}{5}

= \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{8 π}{5}}}

= \frac{\frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{8 π}{5}}}}{\frac{e ^{\frac{16 π}{5}} + 1}{e ^{\frac{8 π}{5}}}}

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

:اقسم الكسور

= \frac{( e ^{\frac{16 π}{5}} - 1 ) e ^{\frac{8 π}{5}}}{e ^{\frac{8 π}{5}} ( e ^{\frac{16 π}{5}} + 1 )}

e^{\frac{8 π}{5}} :

إلغ العوامل المشتركة

= \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

= \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

= \frac{7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}}{π}

\frac{7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}}{π} = \frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

\frac{7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}}{π}

\frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1} = \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

\frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

a \geq 0, b \geq 0

بافتراض أنّ

:فعّل قانون الجذور

= \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

= \frac{7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}}{π}

7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

اضرب بـ:

\frac{7 π e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

7 π \frac{e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}

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

:اضرب كسور

= \frac{e ^{\frac{16 π}{5}} - 1 \cdot 7 π}{e ^{\frac{16 π}{5}} + 1}

= \frac{\frac{7 π e ^{\frac{16 π}{5}} - 1}{e ^{\frac{16 π}{5}} + 1}}{π}

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

: استخدم ميزات الكسور التالية

= \frac{e ^{\frac{16 π}{5}} - 1 \cdot 7 π}{e ^{\frac{16 π}{5}} + 1 π}

\frac{7 π e ^{\frac{16 π}{5}} - 1}{π e ^{\frac{16 π}{5}} + 1}

حوّل لصيغة عدد كسريّ:

\frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

\frac{7 π e ^{\frac{16 π}{5}} - 1}{π e ^{\frac{16 π}{5}} + 1}

\frac{e ^{\frac{16 π}{5}} + 1}{e ^{\frac{16 π}{5}} + 1}

اضرب بالمرافق

= \frac{e ^{\frac{16 π}{5}} - 1 \cdot 7 π e ^{\frac{16 π}{5}} + 1}{e ^{\frac{16 π}{5}} + 1 π e ^{\frac{16 π}{5}} + 1}

e^{\frac{16 π}{5}} + 1 π e^{\frac{16 π}{5}} + 1 = π e^{\frac{16 π}{5}} + π

e^{\frac{16 π}{5}} + 1 π e^{\frac{16 π}{5}} + 1

a a = a

:فعْل قانون الجذور

e^{\frac{16 π}{5}} + 1 e^{\frac{16 π}{5}} + 1 = e^{\frac{16 π}{5}} + 1

= π (e^{\frac{16 π}{5}} + 1)

a (b + c) = ab + a c

: افتح أقواس بالاستعانة بـ

a = π, b = e^{\frac{16 π}{5}}, c = 1

= π e^{\frac{16 π}{5}} + π 1

= π e^{\frac{16 π}{5}} + 1 π

1 π = π :

اضرب

= π e^{\frac{16 π}{5}} + π

= \frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

= \frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

= \frac{7 π e ^{\frac{16 π}{5}} - 1 e ^{\frac{16 π}{5}} + 1}{π e ^{\frac{16 π}{5}} + π}

أمثلة شائعة

sec(arctan(5/12))

sin(210\circ)

(tan(pi))/(12)

2(cos(150)+isin(150))

(1-cos(315))/(sin(315))