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人気のある三角関数 >

4sin(θ)=sqrt(3)sec(θ),0<= θ<180

解

4 sin (θ) = 3 sec (θ), 0 \leq θ < 18 0^{\circ}

解

θ = 3 0^{\circ}, θ = 6 0^{\circ}

+1

ラジアン

θ = \frac{π}{6}, θ = \frac{π}{3}

解答ステップ

4 sin (θ) = 3 sec (θ), 0 \leq θ < 18 0^{\circ}

両辺から

3 sec (θ)

を引く

4 sin (θ) - 3 sec (θ) = 0

サイン, コサインで表わす

4 sin (θ) - sec (θ) 3

基本的な三角関数の公式を使用する:

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

= 4 sin (θ) - \frac{1}{cos ( θ )} 3

簡素化

4 sin (θ) - \frac{1}{cos ( θ )} 3 : \frac{4 sin ( θ ) cos ( θ ) - 3}{cos ( θ )}

4 sin (θ) - \frac{1}{cos ( θ )} 3

\frac{1}{cos ( θ )} 3 = \frac{3}{cos ( θ )}

\frac{1}{cos ( θ )} 3

分数を乗じる:

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

= \frac{1 \cdot 3}{cos ( θ )}

乗算:

1 \cdot 3 = 3

= \frac{3}{cos ( θ )}

= 4 sin (θ) - \frac{3}{cos ( θ )}

元を分数に変換する:

4 sin (θ) = \frac{4 sin ( θ ) cos ( θ )}{cos ( θ )}

= \frac{4 sin ( θ ) cos ( θ )}{cos ( θ )} - \frac{3}{cos ( θ )}

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{4 sin ( θ ) cos ( θ ) - 3}{cos ( θ )}

= \frac{4 sin ( θ ) cos ( θ ) - 3}{cos ( θ )}

\frac{- 3 + 4 cos ( θ ) sin ( θ )}{cos ( θ )} = 0

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

- 3 + 4 cos (θ) sin (θ) = 0

三角関数の公式を使用して書き換える

- 3 + 4 cos (θ) sin (θ)

2倍角の公式を使用:

2 sin (x) cos (x) = sin (2 x)

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

= - 3 + 4 \cdot \frac{sin ( 2 θ )}{2}

- 3 + 4 \cdot \frac{sin ( 2 θ )}{2} = 0

4 \cdot \frac{sin ( 2 θ )}{2} = 2 sin (2 θ)

4 \cdot \frac{sin ( 2 θ )}{2}

分数を乗じる:

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

= \frac{sin ( 2 θ ) \cdot 4}{2}

数を割る:

\frac{4}{2} = 2

= 2 sin (2 θ)

- 3 + 2 sin (2 θ) = 0

3

を右側に移動します

- 3 + 2 sin (2 θ) = 0

両辺に

3

を足す

- 3 + 2 sin (2 θ) + 3 = 0 + 3

簡素化

2 sin (2 θ) = 3

2 sin (2 θ) = 3

以下で両辺を割る

2

2 sin (2 θ) = 3

以下で両辺を割る

2

\frac{2 sin ( 2 θ )}{2} = \frac{3}{2}

簡素化

sin (2 θ) = \frac{3}{2}

sin (2 θ) = \frac{3}{2}

以下の一般解

sin (2 θ) = \frac{3}{2}

sin (x)

36 0^{\circ} n

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}

2 θ = 6 0^{\circ} + 36 0^{\circ} n, 2 θ = 12 0^{\circ} + 36 0^{\circ} n

2 θ = 6 0^{\circ} + 36 0^{\circ} n, 2 θ = 12 0^{\circ} + 36 0^{\circ} n

解く

2 θ = 6 0^{\circ} + 36 0^{\circ} n : θ = 3 0^{\circ} + 18 0^{\circ} n

2 θ = 6 0^{\circ} + 36 0^{\circ} n

以下で両辺を割る

2

2 θ = 6 0^{\circ} + 36 0^{\circ} n

以下で両辺を割る

2

\frac{2 θ}{2} = \frac{6 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

簡素化

\frac{2 θ}{2} = \frac{6 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

簡素化

\frac{2 θ}{2} : θ

\frac{2 θ}{2}

数を割る:

\frac{2}{2} = 1

= θ

簡素化

\frac{6 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2} : 3 0^{\circ} + 18 0^{\circ} n

\frac{6 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

\frac{6 0 ^{\circ}}{2} = 3 0^{\circ}

\frac{6 0 ^{\circ}}{2}

分数の規則を適用する:

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

= \frac{18 0 ^{\circ}}{3 \cdot 2}

数を乗じる:

3 \cdot 2 = 6

= 3 0^{\circ}

\frac{36 0 ^{\circ} n}{2} = 18 0^{\circ} n

\frac{36 0 ^{\circ} n}{2}

数を割る:

\frac{2}{2} = 1

= 18 0^{\circ} n

= 3 0^{\circ} + 18 0^{\circ} n

θ = 3 0^{\circ} + 18 0^{\circ} n

θ = 3 0^{\circ} + 18 0^{\circ} n

θ = 3 0^{\circ} + 18 0^{\circ} n

解く

2 θ = 12 0^{\circ} + 36 0^{\circ} n : θ = 6 0^{\circ} + 18 0^{\circ} n

2 θ = 12 0^{\circ} + 36 0^{\circ} n

以下で両辺を割る

2

2 θ = 12 0^{\circ} + 36 0^{\circ} n

以下で両辺を割る

2

\frac{2 θ}{2} = \frac{12 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

簡素化

\frac{2 θ}{2} = \frac{12 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

簡素化

\frac{2 θ}{2} : θ

\frac{2 θ}{2}

数を割る:

\frac{2}{2} = 1

= θ

簡素化

\frac{12 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2} : 6 0^{\circ} + 18 0^{\circ} n

\frac{12 0 ^{\circ}}{2} + \frac{36 0 ^{\circ} n}{2}

\frac{12 0 ^{\circ}}{2} = 6 0^{\circ}

\frac{12 0 ^{\circ}}{2}

分数の規則を適用する:

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

= \frac{36 0 ^{\circ}}{3 \cdot 2}

数を乗じる:

3 \cdot 2 = 6

= 6 0^{\circ}

共通因数を約分する:

2

= 6 0^{\circ}

\frac{36 0 ^{\circ} n}{2} = 18 0^{\circ} n

\frac{36 0 ^{\circ} n}{2}

数を割る:

\frac{2}{2} = 1

= 18 0^{\circ} n

= 6 0^{\circ} + 18 0^{\circ} n

θ = 6 0^{\circ} + 18 0^{\circ} n

θ = 6 0^{\circ} + 18 0^{\circ} n

θ = 6 0^{\circ} + 18 0^{\circ} n

θ = 3 0^{\circ} + 18 0^{\circ} n, θ = 6 0^{\circ} + 18 0^{\circ} n

範囲の解答

0 \leq θ < 18 0^{\circ}

θ = 3 0^{\circ}, θ = 6 0^{\circ}

グラフ

人気の例

(sin(82))/(sin(x))=sqrt(5)

\frac{sin ( 8 2 ^{\circ} )}{sin ( x )} = 5

(2cos^2(x))/(2(1-sin(x))-cos^2(x))=0

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

2 sin (x) = - 3

tan(θ)=(-12)/5 ,cot(θ)

tan (θ) = \frac{- 12}{5}, cot (θ)

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

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