Math Is Fun Forum

Identity

Member

Registered: 2007-04-18

Posts: 934

Solving Trig

Solve

Please show all steps, especially show how to choose the domain.

JaneFairfax

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Registered: 2007-02-23

Posts: 6,868

Re: Solving Trig

Now choose the values of n for which x ∈ [0,2π].

Last edited by JaneFairfax (2007-11-15 22:44:13)

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: Solving Trig

Thanks Jane... but I have another question:

The book explains solving simple equations like

like this:

Now I think what they do is they multiply the domain of solutions by the coefficient of x => 2pi -> 4pi

That's all good, but now what happens to the domain when you have x + pi/3! So then how would that affect the domain!

Last edited by Identity (2007-11-16 00:40:23)

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Solving Trig

You missed out a 2.

Anyway,

So you want to look at

.

Last edited by JaneFairfax (2007-11-16 04:06:22)

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: Solving Trig

Thanke Jane! That's exactly what I was looking for!