Question

solve to the nearest degree for all the values of Ɵ in the interval 0≤Ɵ≤360
2cos^2Ɵ-4cosƟ+1=0

Answer 1

First we need to use substitution for this like any variable for cos
Lets assume that \[\cos \theta=m\]
So we get equation as \[2m^2-4m+1=0\] Getting this ???

Answer 2

i get that but i think im getting the wrong answer

Answer 3

Have you solve this quadratic equation ??

Answer 4

yes but im not sure how to proceed after i get what m equals to

Answer 5

nevermind i got it

Answer 6

okay ... byeee :)