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人気のある三角関数 >

2tan(x)+sec(x)=0,0<= x<2pi

解

2 tan (x) + sec (x) = 0, 0 \leq x < 2 π

解

x = \frac{7 π}{6}, x = \frac{11 π}{6}

+1

度

x = 21 0^{\circ}, x = 33 0^{\circ}

解答ステップ

2 tan (x) + sec (x) = 0, 0 \leq x < 2 π

サイン, コサインで表わす

sec (x) + 2 tan (x)

基本的な三角関数の公式を使用する:

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

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

基本的な三角関数の公式を使用する:

tan (x) = \frac{sin ( x )}{cos ( x )}

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

簡素化

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

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

乗じる

2 \cdot \frac{sin ( x )}{cos ( x )} : \frac{2 sin ( x )}{cos ( x )}

2 \cdot \frac{sin ( x )}{cos ( x )}

分数を乗じる:

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

= \frac{sin ( x ) \cdot 2}{cos ( x )}

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

規則を適用

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

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

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

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

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

1 + 2 sin (x) = 0

1

を右側に移動します

1 + 2 sin (x) = 0

両辺から

1

を引く

1 + 2 sin (x) - 1 = 0 - 1

簡素化

2 sin (x) = - 1

2 sin (x) = - 1

以下で両辺を割る

2

2 sin (x) = - 1

以下で両辺を割る

2

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

簡素化

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

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

以下の一般解

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

sin (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} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{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} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

x = \frac{7 π}{6} + 2 πn, x = \frac{11 π}{6} + 2 πn

x = \frac{7 π}{6} + 2 πn, x = \frac{11 π}{6} + 2 πn

範囲の解答

0 \leq x < 2 π

x = \frac{7 π}{6}, x = \frac{11 π}{6}

グラフ

人気の例

1-sin(x)=sqrt(3)cos(x)

1 - sin (x) = 3 cos (x)

cos(x)-sec(x)=0

cos (x) - sec (x) = 0

2+7cos(x)=4sin^2(x)

2 + 7 cos (x) = 4 sin^{2} (x)

4 arccos (x) = π

2sin^2(x)+2=7cos(x)

2 sin^{2} (x) + 2 = 7 cos (x)