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General Forums => Academic / School => Topic started by: trust on April 29, 2006, 11:15:51 am

Title: Trig Problems
Post by: trust on April 29, 2006, 11:15:51 am
This is an assignment I'm having trouble with, it's due next class (Tuesday). I've answered some of them so I'll just post what I haven't. Trig is really hurting my grade and frankly I don't care if I learn it as long as I get out of this unit (which seems to have gone on forever) with a passing grade.

Show work:

Verify each identity
(http://img226.imageshack.us/img226/2060/10wi.png)

Solve each equation over the interval [0,2pi]. Give exact answers (I guess that means radian form.)
(http://img226.imageshack.us/img226/5821/28xp1.png)

Find the complete solution set for each equation. Give exact answers.
(http://img226.imageshack.us/img226/8933/32zj.png)

Approximate the solutions of the equation in the interval [0,2pi]. Use a graphing calculator.
(http://img214.imageshack.us/img214/4021/41sd.png)
Title: Re: Trig Problems
Post by: rabbit on April 29, 2006, 07:13:37 pm
It's been a while since trig, but I can say this:
tan2x - 3 = 0
tan2x = 3
tanx = sqrt(3)
x = tan-1(sqrt[3])
x = pi/6, 5pi/6, 7pi/6, 11pi/6
Title: Re: Trig Problems
Post by: dark_drake on May 01, 2006, 07:20:49 pm
Do you still need these?
Title: Re: Trig Problems
Post by: trust on May 01, 2006, 08:02:18 pm
Quote from: dark_drake on May 01, 2006, 07:20:49 pm
Do you still need these?

Yes. I actually have an AP exam tomorrow and don't have to turn these in until Thursday now. (We are excused from all classes for the day if we have exams.)
Title: Re: Trig Problems
Post by: dark_drake on May 01, 2006, 08:48:51 pm
Okay, it took a while to type, but I got the first 5.
1, working from the left side
(http://sidoh.dark-wire.net/upload/viewitem.php?id=117)

2, working from the right side
(http://sidoh.dark-wire.net/upload/viewitem.php?id=118)

3, working from the right and then the left side
(http://sidoh.dark-wire.net/upload/viewitem.php?id=119)

4, working from the right side
(http://sidoh.dark-wire.net/upload/viewitem.php?id=120)

5,working from the left side
(http://sidoh.dark-wire.net/upload/viewitem.php?id=121)

Ok, I tried to show all my work.  I'm just hoping it makes sense to you.
Title: Re: Trig Problems
Post by: Sidoh on May 01, 2006, 08:54:27 pm
All wrong.  Terribly, disgustingly wrong.

You get an F.
Title: Re: Trig Problems
Post by: dark_drake on May 01, 2006, 08:56:00 pm
Quote from: Sidoh on May 01, 2006, 08:54:27 pm
All wrong.  Terribly, disgustingly wrong.

You get an F.
F for FANTASTIC!!!!
Title: Re: Trig Problems
Post by: Sidoh on May 01, 2006, 09:00:51 pm
Quote from: dark_drake on May 01, 2006, 08:56:00 pm
F for FANTASTIC!!!!

More like FUCKINGAWESOME!
Title: Re: Trig Problems
Post by: dark_drake on May 02, 2006, 01:00:34 am
Quote from: Sidoh on May 01, 2006, 09:00:51 pm
More like FUCKINGAWESOME!
That would describe the backscratcher I just found perfectly.
Title: Re: Trig Problems
Post by: trust on May 02, 2006, 08:50:59 pm
Thanks.

Feel free to partake in the remainder. ;)
Title: Re: Trig Problems
Post by: dark_drake on May 02, 2006, 10:45:17 pm
Quote from: OG Trust on May 02, 2006, 08:50:59 pm
Thanks.

Feel free to partake in the remainder. ;)
Ok, I'll do them tonight or tomorrow.
Title: Re: Trig Problems
Post by: dark_drake on May 03, 2006, 08:33:51 pm
Not really sure how to do:
(http://sidoh.dark-wire.net/upload/viewitem.php?id=126)
but those are the answers.  I'd probably say guess and check with each value you have on the unit circle.

Or... you could graph it and look at the graph.
Title: Re: Trig Problems
Post by: trust on May 03, 2006, 08:35:46 pm
Alright, I hate to be a nuisance but had you intended on doing the other 4 or so? I just need to know since I have to turn this in 11 hours from now.
Title: Re: Trig Problems
Post by: dark_drake on May 03, 2006, 10:30:33 pm
yeah, let me type them up
Title: Re: Trig Problems
Post by: dark_drake on May 03, 2006, 10:49:13 pm
Number 7
(http://sidoh.dark-wire.net/upload/viewitem.php?id=127)

Number 8
(http://sidoh.dark-wire.net/upload/viewitem.php?id=128)

Number 9
(http://sidoh.dark-wire.net/upload/viewitem.php?id=129)

Number 10
(http://sidoh.dark-wire.net/upload/viewitem.php?id=130)

I think that's it.  Sorry about no work, calculators have made me lazy.
Title: Re: Trig Problems
Post by: trust on May 04, 2006, 06:15:11 am
Thanks SO much. You are a lifesaver.
Title: Re: Trig Problems
Post by: Sidoh on May 04, 2006, 05:46:02 pm
darkdrake > *