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شائع علم المثلثات >

cos(pi/x)=(sqrt(3))/3

الحلّ

cos (\frac{π}{x}) = \frac{3}{3}

الحلّ

x = \frac{π}{0.95531 \dots + 2 πn}, x = \frac{π}{2 π - 0.95531 \dots + 2 πn}

+1

درجات

x = 0^{\circ} + 24.86702 \dots^{\circ} n, x = 0^{\circ} + 15.50246 \dots^{\circ} n

خطوات الحلّ

cos (\frac{π}{x}) = \frac{3}{3}

Apply trig inverse properties

cos (\frac{π}{x}) = \frac{3}{3}

cos (\frac{π}{x}) = \frac{3}{3} :

حلول عامّة لـ

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

\frac{π}{x} = arccos (\frac{3}{3}) + 2 πn, \frac{π}{x} = 2 π - arccos (\frac{3}{3}) + 2 πn

\frac{π}{x} = arccos (\frac{3}{3}) + 2 πn, \frac{π}{x} = 2 π - arccos (\frac{3}{3}) + 2 πn

\frac{π}{x} = arccos (\frac{3}{3}) + 2 πn

حلّ:

x = \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

\frac{π}{x} = arccos (\frac{3}{3}) + 2 πn

x

اضرب الطرفين بـ

\frac{π}{x} = arccos (\frac{3}{3}) + 2 πn

x

اضرب الطرفين بـ

\frac{π}{x} x = arccos (\frac{3}{3}) x + 2 πn x

بسّط

π = arccos (\frac{3}{3}) x + 2 πn x

π = arccos (\frac{3}{3}) x + 2 πn x

بدّل الأطراف

arccos (\frac{3}{3}) x + 2 πn x = π

arccos (\frac{3}{3}) x + 2 πn x

بسّط:

arccos (\frac{1}{3}) x + 2 πn x

arccos (\frac{3}{3}) x + 2 πn x

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= arccos (\frac{1}{3}) x + 2 πn x

arccos (\frac{1}{3}) x + 2 πn x = π

arccos (\frac{3}{3}) x + 2 πn x = π

arccos (\frac{3}{3}) x + 2 πn x

حلل إلى عوامل:

x (arccos (\frac{1}{3}) + 2 πn)

arccos (\frac{3}{3}) x + 2 πn x

x

قم باخراج العامل المشترك

= x (arccos (\frac{3}{3}) + 2 πn)

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= x (2 πn + arccos (\frac{1}{3}))

x (arccos (\frac{1}{3}) + 2 πn) = π

arccos (\frac{1}{3}) + 2 πn; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

اقسم الطرفين على

x (arccos (\frac{1}{3}) + 2 πn) = π

arccos (\frac{1}{3}) + 2 πn; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

اقسم الطرفين على

\frac{x ( arccos ( \frac{1}{3} ) + 2 πn )}{arccos ( \frac{1}{3} ) + 2 πn} = \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

بسّط

\frac{x ( arccos ( \frac{1}{3} ) + 2 πn )}{arccos ( \frac{1}{3} ) + 2 πn} = \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}

\frac{x ( arccos ( \frac{1}{3} ) + 2 πn )}{arccos ( \frac{1}{3} ) + 2 πn}

بسّط:

x

\frac{x ( arccos ( \frac{1}{3} ) + 2 πn )}{arccos ( \frac{1}{3} ) + 2 πn}

x (arccos (\frac{1}{3}) + 2 πn) = x (arccos (\frac{3}{3}) + 2 πn)

x (arccos (\frac{1}{3}) + 2 πn)

= x (2 πn + arccos (\frac{3}{3}))

= \frac{x ( 2 πn + arccos ( \frac{3}{3} ) )}{arccos ( \frac{1}{3} ) + 2 πn}

arccos (\frac{1}{3}) + 2 πn = arccos (\frac{3}{3}) + 2 πn

arccos (\frac{1}{3}) + 2 πn

= arccos (\frac{3}{3}) + 2 πn

= \frac{x ( 2 πn + arccos ( \frac{3}{3} ) )}{arccos ( \frac{3}{3} ) + 2 πn}

arccos (\frac{3}{3}) + 2 πn :

إلغ العوامل المشتركة

= x

\frac{π}{arccos ( \frac{1}{3} ) + 2 πn}

بسّط:

\frac{π}{arccos ( \frac{3}{3} ) + 2 πn}

\frac{π}{arccos ( \frac{1}{3} ) + 2 πn}

arccos (\frac{1}{3}) + 2 πn = arccos (\frac{3}{3}) + 2 πn

arccos (\frac{1}{3}) + 2 πn

= arccos (\frac{3}{3}) + 2 πn

= \frac{π}{arccos ( \frac{3}{3} ) + 2 πn}

x = \frac{π}{arccos ( \frac{3}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

x = \frac{π}{arccos ( \frac{3}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

x = \frac{π}{arccos ( \frac{3}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

\frac{π}{arccos ( \frac{3}{3} ) + 2 πn}

بسّط:

\frac{π}{arccos ( \frac{1}{3} ) + 2 πn}

\frac{π}{arccos ( \frac{3}{3} ) + 2 πn}

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}

x = \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}; n \neq = - \frac{arccos ( \frac{1}{3} )}{2 π}

\frac{π}{x} = 2 π - arccos (\frac{3}{3}) + 2 πn

حلّ:

x = \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

\frac{π}{x} = 2 π - arccos (\frac{3}{3}) + 2 πn

x

اضرب الطرفين بـ

\frac{π}{x} = 2 π - arccos (\frac{3}{3}) + 2 πn

x

اضرب الطرفين بـ

\frac{π}{x} x = 2 π x - arccos (\frac{3}{3}) x + 2 πn x

بسّط

π = 2 π x - arccos (\frac{3}{3}) x + 2 πn x

π = 2 π x - arccos (\frac{3}{3}) x + 2 πn x

بدّل الأطراف

2 π x - arccos (\frac{3}{3}) x + 2 πn x = π

2 π x - arccos (\frac{3}{3}) x + 2 πn x

بسّط:

2 π x - arccos (\frac{1}{3}) x + 2 πn x

2 π x - arccos (\frac{3}{3}) x + 2 πn x

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= 2 π x - arccos (\frac{1}{3}) x + 2 πn x

2 π x - arccos (\frac{1}{3}) x + 2 πn x = π

2 π x - arccos (\frac{3}{3}) x + 2 πn x = π

2 π x - arccos (\frac{3}{3}) x + 2 πn x

حلل إلى عوامل:

x (2 π - arccos (\frac{1}{3}) + 2 πn)

2 π x - arccos (\frac{3}{3}) x + 2 πn x

x

قم باخراج العامل المشترك

= x (2 π - arccos (\frac{3}{3}) + 2 πn)

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= x (2 π + 2 πn - arccos (\frac{1}{3}))

x (2 π - arccos (\frac{1}{3}) + 2 πn) = π

2 π - arccos (\frac{1}{3}) + 2 πn; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

اقسم الطرفين على

x (2 π - arccos (\frac{1}{3}) + 2 πn) = π

2 π - arccos (\frac{1}{3}) + 2 πn; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

اقسم الطرفين على

\frac{x ( 2 π - arccos ( \frac{1}{3} ) + 2 πn )}{2 π - arccos ( \frac{1}{3} ) + 2 πn} = \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

بسّط

\frac{x ( 2 π - arccos ( \frac{1}{3} ) + 2 πn )}{2 π - arccos ( \frac{1}{3} ) + 2 πn} = \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

\frac{x ( 2 π - arccos ( \frac{1}{3} ) + 2 πn )}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

بسّط:

x

\frac{x ( 2 π - arccos ( \frac{1}{3} ) + 2 πn )}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

x (2 π - arccos (\frac{1}{3}) + 2 πn) = x (2 π - arccos (\frac{3}{3}) + 2 πn)

x (2 π - arccos (\frac{1}{3}) + 2 πn)

= x (2 π + 2 πn - arccos (\frac{3}{3}))

= \frac{x ( 2 π + 2 πn - arccos ( \frac{3}{3} ) )}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

2 π - arccos (\frac{1}{3}) + 2 πn = 2 π - arccos (\frac{3}{3}) + 2 πn

2 π - arccos (\frac{1}{3}) + 2 πn

= 2 π - arccos (\frac{3}{3}) + 2 πn

= \frac{x ( 2 π + 2 πn - arccos ( \frac{3}{3} ) )}{2 π - arccos ( \frac{3}{3} ) + 2 πn}

2 π - arccos (\frac{3}{3}) + 2 πn :

إلغ العوامل المشتركة

= x

\frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

بسّط:

\frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}

\frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

2 π - arccos (\frac{1}{3}) + 2 πn = 2 π - arccos (\frac{3}{3}) + 2 πn

2 π - arccos (\frac{1}{3}) + 2 πn

= 2 π - arccos (\frac{3}{3}) + 2 πn

= \frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}

x = \frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

x = \frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

x = \frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

\frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}

بسّط:

\frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

\frac{π}{2 π - arccos ( \frac{3}{3} ) + 2 πn}

\frac{3}{3} = \frac{1}{3}

\frac{3}{3}

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

:فعْل قانون الجذور

3 = 3^{\frac{1}{2}}

= \frac{3 ^{\frac{1}{2}}}{3}

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

:فعّل قانون القوى

\frac{3 ^{\frac{1}{2}}}{3 ^{1}} = \frac{1}{3 ^{1 - \frac{1}{2}}}

= \frac{1}{3 ^{1 - \frac{1}{2}}}

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

اطرح الأعداد

= \frac{1}{3 ^{\frac{1}{2}}}

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

:فعْل قانون الجذور

3^{\frac{1}{2}} = 3

= \frac{1}{3}

= \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

x = \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}; n \neq = \frac{- 2 π + arccos ( \frac{1}{3} )}{2 π}

x = \frac{π}{arccos ( \frac{1}{3} ) + 2 πn}, x = \frac{π}{2 π - arccos ( \frac{1}{3} ) + 2 πn}

أظهر الحلّ بالتمثيل العشريّ

x = \frac{π}{0.95531 \dots + 2 πn}, x = \frac{π}{2 π - 0.95531 \dots + 2 πn}

رسم

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