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人気のある三角関数 >

d^2+13d+36=(sin^2(x))/2

解

d^{2} + 13 d + 36 = \frac{sin ^{2} ( x )}{2}

解

x = arcsin (2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (2 d^{2} + 26 d + 72) + 2 πn

解答ステップ

d^{2} + 13 d + 36 = \frac{sin ^{2} ( x )}{2}

辺を交換する

\frac{sin ^{2} ( x )}{2} = d^{2} + 13 d + 36

置換で解く

\frac{sin ^{2} ( x )}{2} = d^{2} + 13 d + 36

仮定:

sin (x) = u

\frac{u ^{2}}{2} = d^{2} + 13 d + 36

\frac{u ^{2}}{2} = d^{2} + 13 d + 36 : u = 2 d^{2} + 26 d + 72, u = - 2 d^{2} + 26 d + 72

\frac{u ^{2}}{2} = d^{2} + 13 d + 36

以下で両辺を乗じる:

2

\frac{u ^{2}}{2} = d^{2} + 13 d + 36

以下で両辺を乗じる:

2

\frac{2 u ^{2}}{2} = 2 d^{2} + 2 \cdot 13 d + 2 \cdot 36

簡素化

u^{2} = 2 d^{2} + 26 d + 72

u^{2} = 2 d^{2} + 26 d + 72

x^{2} = f (a)

の場合, 解は

x = f (a), - f (a)

u = 2 d^{2} + 26 d + 72, u = - 2 d^{2} + 26 d + 72

代用を戻す

u = sin (x)

sin (x) = 2 d^{2} + 26 d + 72, sin (x) = - 2 d^{2} + 26 d + 72

sin (x) = 2 d^{2} + 26 d + 72, sin (x) = - 2 d^{2} + 26 d + 72

sin (x) = 2 d^{2} + 26 d + 72 : x = arcsin (2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (- 2 d^{2} + 26 d + 72) + 2 πn

sin (x) = 2 d^{2} + 26 d + 72

三角関数の逆数プロパティを適用する

sin (x) = 2 d^{2} + 26 d + 72

以下の一般解

sin (x) = 2 d^{2} + 26 d + 72

sin (x) = a \Rightarrow x = arcsin (a) + 2 πn, x = π + arcsin (a) + 2 πn

x = arcsin (2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (- 2 d^{2} + 26 d + 72) + 2 πn

x = arcsin (2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (- 2 d^{2} + 26 d + 72) + 2 πn

sin (x) = - 2 d^{2} + 26 d + 72 : x = arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (2 d^{2} + 26 d + 72) + 2 πn

sin (x) = - 2 d^{2} + 26 d + 72

三角関数の逆数プロパティを適用する

sin (x) = - 2 d^{2} + 26 d + 72

以下の一般解

sin (x) = - 2 d^{2} + 26 d + 72

sin (x) = a \Rightarrow x = arcsin (a) + 2 πn, x = π + arcsin (a) + 2 πn

x = arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (2 d^{2} + 26 d + 72) + 2 πn

x = arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (2 d^{2} + 26 d + 72) + 2 πn

すべての解を組み合わせる

x = arcsin (2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = arcsin (- 2 d^{2} + 26 d + 72) + 2 πn, x = π + arcsin (2 d^{2} + 26 d + 72) + 2 πn

グラフ

人気の例

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