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인기 있는 삼각법 >

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

해법

cos (3 x) = \frac{3}{3}

해법

x = \frac{0.95531 \dots}{3} + \frac{2 πn}{3}, x = \frac{2 π}{3} - \frac{0.95531 \dots}{3} + \frac{2 πn}{3}

+1

도

x = 18.24520 \dots^{\circ} + 12 0^{\circ} n, x = 101.75479 \dots^{\circ} + 12 0^{\circ} n

솔루션 단계

cos (3 x) = \frac{3}{3}

트리거 역속성 적용

cos (3 x) = \frac{3}{3}

일반 솔루션

cos (3 x) = \frac{3}{3}

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

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

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

3 x = arccos (\frac{3}{3}) + 2 πn

해결 :

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

3 x = arccos (\frac{3}{3}) + 2 πn

arccos (\frac{3}{3}) + 2 πn

간소화하다 :

arccos (\frac{1}{3}) + 2 πn

arccos (\frac{3}{3}) + 2 πn

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

\frac{3}{3}

급진적인 규칙 적용:

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

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

지수 규칙 적용:

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

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

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

숫자를 빼세요:

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

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

급진적인 규칙 적용:

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

= \frac{1}{3}

= arccos (\frac{1}{3}) + 2 πn

3 x = arccos (\frac{1}{3}) + 2 πn

양쪽을 다음으로 나눕니다

3

3 x = arccos (\frac{1}{3}) + 2 πn

양쪽을 다음으로 나눕니다

3

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

단순화

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

\frac{3 x}{3}

간소화하다 :

x

\frac{3 x}{3}

숫자를 나눕니다:

\frac{3}{3} = 1

= x

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

간소화하다 :

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

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

arccos (\frac{1}{3}) = arccos (\frac{3}{3})

arccos (\frac{1}{3})

= arccos (\frac{3}{3})

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

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

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

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

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

해결 :

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

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

2 π - arccos (\frac{3}{3}) + 2 πn

간소화하다 :

2 π - arccos (\frac{1}{3}) + 2 πn

2 π - arccos (\frac{3}{3}) + 2 πn

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

\frac{3}{3}

급진적인 규칙 적용:

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

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

지수 규칙 적용:

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

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

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

숫자를 빼세요:

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

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

급진적인 규칙 적용:

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

= \frac{1}{3}

= 2 π - arccos (\frac{1}{3}) + 2 πn

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

양쪽을 다음으로 나눕니다

3

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

양쪽을 다음으로 나눕니다

3

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

단순화

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

\frac{3 x}{3}

간소화하다 :

x

\frac{3 x}{3}

숫자를 나눕니다:

\frac{3}{3} = 1

= x

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

간소화하다 :

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

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

arccos (\frac{1}{3}) = arccos (\frac{3}{3})

arccos (\frac{1}{3})

= arccos (\frac{3}{3})

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

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

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

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

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

해를 10진수 형식으로 표시

x = \frac{0.95531 \dots}{3} + \frac{2 πn}{3}, x = \frac{2 π}{3} - \frac{0.95531 \dots}{3} + \frac{2 πn}{3}

그래프

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