What is the general solution for cos(x)=-4/9 ?

The general solution for cos(x)=-4/9 is x=2.03135…+2pin,x=-2.03135…+2pin

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

cos(x)=-4/9

cos (x) = - \frac{4}{9}

x = 2.03135 \dots + 2 πn, x = - 2.03135 \dots + 2 πn

Solution steps

cos (x) = - \frac{4}{9}

Apply trig inverse properties

x = arccos (- \frac{4}{9}) + 2 πn, x = - arccos (- \frac{4}{9}) + 2 πn

Show solutions in decimal form

x = 2.03135 \dots + 2 πn, x = - 2.03135 \dots + 2 πn

7 sin (c) + 19 = 0

cos^{3} (x) = \frac{1}{2}

sin (x + 2 0^{\circ}) = cos (x - 5 0^{\circ})

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

sin (2 x) = \frac{( 7 m - 9 )}{9}

What is the general solution for cos(x)=-4/9 ?
The general solution for cos(x)=-4/9 is x=2.03135…+2pin,x=-2.03135…+2pin