ja

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

人気のある三角関数 >

(sin^2(x))/(1+cos(x))=1

解

\frac{sin ^{2} ( x )}{1 + cos ( x )} = 1

解

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

+1

度

x = 9 0^{\circ} + 36 0^{\circ} n, x = 27 0^{\circ} + 36 0^{\circ} n

解答ステップ

\frac{sin ^{2} ( x )}{1 + cos ( x )} = 1

両辺から

1

を引く

\frac{sin ^{2} ( x )}{1 + cos ( x )} - 1 = 0

簡素化

\frac{sin ^{2} ( x )}{1 + cos ( x )} - 1 : \frac{sin ^{2} ( x ) - 1 - cos ( x )}{1 + cos ( x )}

\frac{sin ^{2} ( x )}{1 + cos ( x )} - 1

元を分数に変換する:

1 = \frac{1 ( 1 + cos ( x ) )}{1 + cos ( x )}

= \frac{sin ^{2} ( x )}{1 + cos ( x )} - \frac{1 \cdot ( 1 + cos ( x ) )}{1 + cos ( x )}

分母が等しいので, 分数を組み合わせる:

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

= \frac{sin ^{2} ( x ) - 1 \cdot ( 1 + cos ( x ) )}{1 + cos ( x )}

乗算:

1 \cdot (1 + cos (x)) = (1 + cos (x))

= \frac{sin ^{2} ( x ) - ( cos ( x ) + 1 )}{1 + cos ( x )}

- (1 + cos (x)) : - 1 - cos (x)

- (1 + cos (x))

括弧を分配する

= - (1) - (cos (x))

マイナス・プラスの規則を適用する

+ (- a) = - a

= - 1 - cos (x)

= \frac{sin ^{2} ( x ) - 1 - cos ( x )}{1 + cos ( x )}

\frac{sin ^{2} ( x ) - 1 - cos ( x )}{1 + cos ( x )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

sin^{2} (x) - 1 - cos (x) = 0

三角関数の公式を使用して書き換える

- 1 - cos (x) + sin^{2} (x)

ピタゴラスの公式を使用する:

1 = cos^{2} (x) + sin^{2} (x)

1 - sin^{2} (x) = cos^{2} (x)

= - cos (x) - cos^{2} (x)

- cos (x) - cos^{2} (x) = 0

置換で解く

- cos (x) - cos^{2} (x) = 0

仮定:

cos (x) = u

- u - u^{2} = 0

- u - u^{2} = 0 : u = - 1, u = 0

- u - u^{2} = 0

標準的な形式で書く

a x^{2} + b x + c = 0

- u^{2} - u = 0

解くとthe二次式

- u^{2} - u = 0

二次Equationの公式:

次の場合:

a = - 1, b = - 1, c = 0

u_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 ( - 1 ) \cdot 0}{2 ( - 1 )}

u_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 ( - 1 ) \cdot 0}{2 ( - 1 )}

(- 1)^{2} - 4 (- 1) \cdot 0 = 1

(- 1)^{2} - 4 (- 1) \cdot 0

規則を適用

- (- a) = a

= (- 1)^{2} + 4 \cdot 1 \cdot 0

(- 1)^{2} = 1

(- 1)^{2}

指数の規則を適用する:

n

が偶数であれば

(- a)^{n} = a^{n}

(- 1)^{2} = 1^{2}

= 1^{2}

規則を適用

1^{a} = 1

= 1

4 \cdot 1 \cdot 0 = 0

4 \cdot 1 \cdot 0

規則を適用

0 \cdot a = 0

= 0

= 1 + 0

数を足す:

1 + 0 = 1

= 1

規則を適用

1 = 1

= 1

u_{1, 2} = \frac{- ( - 1 ) \pm 1}{2 ( - 1 )}

解を分離する

u_{1} = \frac{- ( - 1 ) + 1}{2 ( - 1 )}, u_{2} = \frac{- ( - 1 ) - 1}{2 ( - 1 )}

u = \frac{- ( - 1 ) + 1}{2 ( - 1 )} : - 1

\frac{- ( - 1 ) + 1}{2 ( - 1 )}

括弧を削除する:

(- a) = - a, - (- a) = a

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

数を足す:

1 + 1 = 2

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

数を乗じる:

2 \cdot 1 = 2

= \frac{2}{- 2}

分数の規則を適用する:

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

= - \frac{2}{2}

規則を適用

\frac{a}{a} = 1

= - 1

u = \frac{- ( - 1 ) - 1}{2 ( - 1 )} : 0

\frac{- ( - 1 ) - 1}{2 ( - 1 )}

括弧を削除する:

(- a) = - a, - (- a) = a

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

数を引く:

1 - 1 = 0

= \frac{0}{- 2 \cdot 1}

数を乗じる:

2 \cdot 1 = 2

= \frac{0}{- 2}

分数の規則を適用する:

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

= - \frac{0}{2}

規則を適用

\frac{0}{a} = 0, a \neq = 0

= - 0

= 0

二次equationの解:

u = - 1, u = 0

代用を戻す

u = cos (x)

cos (x) = - 1, cos (x) = 0

cos (x) = - 1, cos (x) = 0

cos (x) = - 1 : x = π + 2 πn

cos (x) = - 1

以下の一般解

cos (x) = - 1

cos (x)

2 πn

循環を含む周期性テーブル:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

x = π + 2 πn

x = π + 2 πn

cos (x) = 0 : x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

cos (x) = 0

以下の一般解

cos (x) = 0

cos (x)

2 πn

循環を含む周期性テーブル:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

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

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

すべての解を組み合わせる

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

equationは以下で未定義のため:

π + 2 πn

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

グラフ

人気の例

sqrt(1+sin(x))=cos(x)

cos^2(θ)+sin(θ)=2

3tan^2(θ)+tan(θ)=0

6sin(θ)+1=4sin(θ)