English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

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

Solución

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

x = 2 πn, x = π + 2 πn

Grados

x = 0^{\circ} + 36 0^{\circ} n, x = 18 0^{\circ} + 36 0^{\circ} n

Pasos de solución

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

Re-escribir usando identidades trigonométricas

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

Utilizar la identidad trigonométrica del ángulo doble:

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

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

Simplificar

- 1 + 1 - 2 sin^{2} (x) - sin^{2} (x) : - 3 sin^{2} (x)

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

Sumar elementos similares:

- 2 sin^{2} (x) - sin^{2} (x) = - 3 sin^{2} (x)

= - 1 + 1 - 3 sin^{2} (x)

- 1 + 1 = 0

= - 3 sin^{2} (x)

= - 3 sin^{2} (x)

- 3 sin^{2} (x) = 0

Dividir ambos lados entre

- 3

- 3 sin^{2} (x) = 0

Dividir ambos lados entre

- 3

- 3 sin^{2} (x) = 0

Dividir ambos lados entre

- 3

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

Simplificar

sin^{2} (x) = 0

sin^{2} (x) = 0

Aplicar la regla

x^{n} = 0 \Rightarrow x = 0

sin (x) = 0

Soluciones generales para

sin (x) = 0

tabla de valores periódicos con

2 πn

intervalos:

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 = 0 + 2 πn, x = π + 2 πn

x = 0 + 2 πn, x = π + 2 πn

Resolver

x = 0 + 2 πn : x = 2 πn

x = 0 + 2 πn

0 + 2 πn = 2 πn

x = 2 πn

x = 2 πn, x = π + 2 πn

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

4 sin^{2} (x) + 4 cos (2 x) = 1

100 + 60 sin (\frac{7 π}{3} x) = 100, 0 \leq x \leq 1

cot (θ) = 4, cos (θ) < 0

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