Question

Help solving: Cos2Θ+2Cos²Θ=2 with angle formulas

Answer 1

I need help on factoring please

Answer 2

but I dont know if I am suppose to bring the 2 to the other side before I factor

Answer 3

What sign is that?

Answer 4

What kind of math is that?

Answer 5

Θ

Answer 6

Is that theta?

Answer 7

I think so

Answer 8

Theta = 1/6 (6 pi n-pi), n element Z

Answer 9

this is calculus isn't it

Answer 10

Theta = 1/6 (6 pi n+pi), n element Z

Answer 11

this is trigonometry

Answer 12

haha trig is even worse for me lol

Answer 13

Can the equation be rewritten as Cos2Θ+2Cos²Θ-2=0

Answer 14

2 cos(2 Theta) = 1 alternate form

Answer 15

2 cos(2 Theta)+1 = 2

Answer 16

-2 sin^2(Theta)+2 cos^2(Theta)+1 = 2

Answer 17

alternate form

Answer 18

wait before factoring, do I have to bring 2 to the left side of the equation?

Answer 19

Cos2Θ+2Cos²Θ=2

Answer 20

If I am correct, once the two is brought to the left and factored, it should be
Cos²Θ(1-sin²Θ+2-2)=0?

Answer 21

I used the graph

Answer 22

I am trying to solve this algebraically lol :)