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General Forums => Academic / School => Topic started by: trust on May 09, 2006, 06:11:51 pm

Title: Urgent Trig Problems (11)
Post by: trust on May 09, 2006, 06:11:51 pm
If anybody can do any of these for me I would greatly appreciate it. I don't know if you guys feel like it's better to learn it on your own or whatever, but I don't really care about that. I'm struggeling so much in that class and our teacher gave us a take home test (I have to turn it in tomorrow morning.) Me getting a good grade on a TEST would really help my grade (I'm pretty sure I'm still failing.)



Solve over the interval [0,2pi]. Give exact answers for problems 5-8. Show your work.
(http://img397.imageshack.us/img397/3170/20ug1.png)

Find the complete solution set. Verify on the calculator.
(http://img397.imageshack.us/img397/6571/31kj.png)

Use the sum/difference formulas to find the exact value. Show work.
(http://img397.imageshack.us/img397/628/47xz.png)

Sketch and find the following ratios if tan(u)=-4/3 for 3pi/2 <u < 2pi - 2

sin u              cos u              cot u
sec u             csc u               sin 2u
cos 2u           tan 2u             cot 2u
sec 2u           csc 2u



Obviously ANY help is greatly appreciated it.
Title: Re: Urgent Trig Problems (11)
Post by: dark_drake on May 10, 2006, 01:05:43 am
These aren't as easy, but here's the first four:
(http://sidoh.dark-wire.net/upload/viewitem.php?id=137)

(http://sidoh.dark-wire.net/upload/viewitem.php?id=138)

(http://sidoh.dark-wire.net/upload/viewitem.php?id=139)

(http://sidoh.dark-wire.net/upload/viewitem.php?id=140)

Title: Re: Urgent Trig Problems (11)
Post by: dark_drake on May 10, 2006, 01:42:32 am
On the last one, I tried and tried, but just couldn't figure out how to do it algebraically.

(http://sidoh.dark-wire.net/upload/viewitem.php?id=142)
Title: Re: Urgent Trig Problems (11)
Post by: dark_drake on May 10, 2006, 02:06:52 am
(http://sidoh.dark-wire.net/upload/viewitem.php?id=143)

These ones are getting insane; do you have a calculator? I only ask because that's the only way I can do some of these.  Then again, I've never taken a trig course and am probably missing a lot of things I should know.
Title: Re: Urgent Trig Problems (11)
Post by: dark_drake on May 10, 2006, 02:24:33 am
The next few are:

(http://sidoh.dark-wire.net/upload/viewitem.php?id=144)
Title: Re: Urgent Trig Problems (11)
Post by: dark_drake on May 10, 2006, 02:49:57 am
Quote from: OG Trust on May 09, 2006, 06:11:51 pm
Sketch and find the following ratios if tan(u)=-4/3 for 3pi/2 <u < 2pi - 2

sin u              cos u              cot u
sec u             csc u               sin 2u
cos 2u           tan 2u             cot 2u
sec 2u           csc 2u


I won't be able to draw all of these for you, but here's the basic drawing you need
(http://sidoh.dark-wire.net/upload/viewitem.php?id=145)
sin u= -4/5
cos u = 3/5
cot u =-3/4
sec u = 5/3
csc u =-5/4
sin 2u = -24/25
cos 2u = -7/25
tan 2u = 24/7
cot 2u=7/24
sec 2u = -25/7
csc 2u = -25/24

Use every answer in here at your own risk;  I am just trying to help.
Title: Re: Urgent Trig Problems (11)
Post by: trust on May 10, 2006, 06:08:58 am
Wow. Thanks. I had woke up this morning planning on thinking of an excuse on why I needed to turn it in late (all I had complete were the first 4 which weren't posted here.)

Thanks so much.