Question

Uhmm anyone good in trig?

Answer 1

trigonometry is a vast subject what's ur grade in school or college or...

Answer 2

\[\Large 4\cos^2x-4\cos x+1=0\]

Answer 3

Familiar with solving quadratic equations?

Answer 4

Okay.. No because I just got moved into trig and my teacher's out for the week sp I'm clueless...

Answer 5

Quadratic equations... they have nothing to do with trig.

Answer 6

I somewhat kno about them but not a whole lot..

Answer 7

Like here's what I would've started out with.. The equation is 4cos^2x-4cosx+1=0.. So I'd factor it into (4cosx+1)(4cosx-1).. Am I right?

Answer 8

Okay, I get the factoring part, but you factored it incorrectly ^_^

Answer 9

Yeah I'm not so good in factoring either.. Then how would I factor it?

Answer 10

I don't know how to teach factoring...(a shame on my part)
So just accept that it's (2cosx - 1)^2

Answer 11

So then where do I go from there?

Answer 12

Would I just divide by 2?

Answer 13

No... this is equal to zero...

Answer 14

Okay.. So the problem I'd have left is (2cosx-1)^2=0.. But how do I finish tht?