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x=(20)/(sin(45))

الحلّ

x = \frac{20}{sin ( 4 5 ^{\circ} )}

الحلّ

x = 202

+1

العشري

x = 28.28427 \dots

خطوات الحلّ

x = \frac{20}{sin ( 4 5 ^{\circ} )}

\frac{20}{sin ( 4 5 ^{\circ} )}

بسّط:

202

\frac{20}{sin ( 4 5 ^{\circ} )}

sin (4 5^{\circ}) = \frac{2}{2}

sin (4 5^{\circ})

استخدم المتطابقة الأساسيّة التالية:

sin (4 5^{\circ}) = \frac{2}{2}

sin (x)

periodicity table with

36 0^{\circ} n

cycle:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

= \frac{20}{\frac{2}{2}}

بسّط

\frac{20}{\frac{2}{2}}

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

: استخدم ميزات الكسور التالية

= \frac{20 \cdot 2}{2}

20 \cdot 2 = 40 :

اضرب الأعداد

= \frac{40}{2}

40

حلل إلى عوامل:

2^{3} \cdot 5

40 = 2^{3} \cdot 5

حلّل إلى عوامل

= \frac{2 ^{3} \cdot 5}{2}

\frac{2 ^{3} \cdot 5}{2}

اختزل:

5 \cdot 2^{\frac{5}{2}}

\frac{2 ^{3} \cdot 5}{2}

:فعْل قانون الجذور

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

= \frac{2 ^{3} \cdot 5}{2 ^{\frac{1}{2}}}

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

:فعّل قانون القوى

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

= 5 \cdot 2^{- \frac{1}{2} + 3}

3 - \frac{1}{2} = \frac{5}{2} :

اطرح الأعداد

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

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

2^{\frac{5}{2}} = 2^{2} 2

2^{\frac{5}{2}}

2^{\frac{5}{2}} = 2^{2 + \frac{1}{2}}

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

x^{a + b} = x^{a} x^{b}

:فعّل قانون القوى

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

بسّط

= 2^{2} 2

= 5 \cdot 2^{2} 2

2^{2} = 4

= 5 \cdot 42

5 \cdot 4 = 20 :

اضرب الأعداد

= 202

x = 202

x = 202

أمثلة شائعة

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