What is the general solution for 3cos^2(x)+cos(x)-4=0 ?

The general solution for 3cos^2(x)+cos(x)-4=0 is x=2pin

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3cos^2(x)+cos(x)-4=0

3 cos^{2} (x) + cos (x) - 4 = 0

x = 2 πn

Solution steps

3 cos^{2} (x) + cos (x) - 4 = 0

Solve by substitution

cos (x) = 1, cos (x) = - \frac{4}{3}

cos (x) = 1 : x = 2 πn

cos (x) = - \frac{4}{3} :

No Solution

Combine all the solutions

x = 2 πn

sin (θ) = 7

sin (3 x - \frac{π}{2}) = - \frac{3}{2}, (3 π, 4 π)

2 sin^{2} (x) - 7 cos (x) - 5 = 0

cos (x) = sin (0)

1 = \frac{1}{0.5} sin (x + 3 0^{\circ})

What is the general solution for 3cos^2(x)+cos(x)-4=0 ?
The general solution for 3cos^2(x)+cos(x)-4=0 is x=2pin