What is the general solution for cos(x)=0.4 ?

The general solution for cos(x)=0.4 is x=1.15927…+2pin,x=2pi-1.15927…+2pin

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

cos(x)=0.4

cos (x) = 0.4

x = 1.15927 \dots + 2 πn, x = 2 π - 1.15927 \dots + 2 πn

Degrees

x = 66.42182 \dots^{\circ} + 36 0^{\circ} n, x = 293.57817 \dots^{\circ} + 36 0^{\circ} n

Solution steps

cos (x) = 0.4

Apply trig inverse properties

cos (x) = 0.4

General solutions for

cos (x) = 0.4

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (0.4) + 2 πn, x = 2 π - arccos (0.4) + 2 πn

x = arccos (0.4) + 2 πn, x = 2 π - arccos (0.4) + 2 πn

Show solutions in decimal form

x = 1.15927 \dots + 2 πn, x = 2 π - 1.15927 \dots + 2 πn

arctan (tan (\frac{2 π}{3}))

cos (- \frac{2 π}{3})

sin (3 0^{\circ})

cos (\frac{5 π}{3})

cot (12 0^{\circ})

What is the general solution for cos(x)=0.4 ?
The general solution for cos(x)=0.4 is x=1.15927…+2pin,x=2pi-1.15927…+2pin