What is the general solution for cos(θ)=-0.7 ?

The general solution for cos(θ)=-0.7 is θ=2.34619…+2pin,θ=-2.34619…+2pin

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

cos(θ)=-0.7

cos (θ) = - 0.7

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

Solution steps

cos (θ) = - 0.7

Apply trig inverse properties

θ = arccos (- 0.7) + 2 πn, θ = - arccos (- 0.7) + 2 πn

Show solutions in decimal form

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

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

2 sin (x) = - 1, 0 \leq x < 2 π

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

sec (3 x) - 4 = 0

6 sin^{2} (θ) + 5 sin (θ) = - 2 sin (θ) - 1

What is the general solution for cos(θ)=-0.7 ?
The general solution for cos(θ)=-0.7 is θ=2.34619…+2pin,θ=-2.34619…+2pin