What is the general solution for cos(θ)=-0.2 ?

The general solution for cos(θ)=-0.2 is θ=1.77215…+2pin,θ=-1.77215…+2pin

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

cos(θ)=-0.2

cos (θ) = - 0.2

θ = 1.77215 \dots + 2 πn, θ = - 1.77215 \dots + 2 πn

Solution steps

cos (θ) = - 0.2

Apply trig inverse properties

θ = arccos (- 0.2) + 2 πn, θ = - arccos (- 0.2) + 2 πn

Show solutions in decimal form

θ = 1.77215 \dots + 2 πn, θ = - 1.77215 \dots + 2 πn

sin^{2} (x) - 5 cos (x) = 3

cos (x) = - \frac{9}{41}

5 sin (y) = 3 sin (y) + 3

2 sin^{2} (θ) + sin^{2} (θ) = 0

cos (θ) = - 0.42, 0^{\circ} \leq θ < 36 0^{\circ}

What is the general solution for cos(θ)=-0.2 ?
The general solution for cos(θ)=-0.2 is θ=1.77215…+2pin,θ=-1.77215…+2pin