Mathematics - 19 December 2007

Why is the diagram on the left required to prove the Pythagorean Theorem, when the diagram on the right seems sufficient to do so?
http://jwilson.coe.uga.edu/EMT668/emt668.student.folders/HeadAngela/essay1/image1.gif

2007-12-19 23:40:22 · 7 answers · asked by Anonymous

If x = 9tan(theta) and theta is in the first quadrant, find the expression for sin(theta) and cos(theta) in terms of x.

can someone show me how to do this step by step?

2007-12-19 23:25:25 · 3 answers · asked by SK 1

x<4
y<4
Can we say that x+y<8 so x+y-8<0?

2007-12-19 23:14:13 · 5 answers · asked by Anonymous

logx^2 + logx^3 / log(100x) = 3

all logs in base 10. can someone show me how to solve this step by step?

2007-12-19 23:13:58 · 8 answers · asked by SK 1

What is your favorite math topic? Why? I love geometry because geometric shapes are so beautiful and geometric proofs increase my attention to detail.

What about you? Tell me about your math experience and what your favorite math topic is and why?

2007-12-19 23:13:45 · 6 answers · asked by Anonymous

2007-12-19 21:26:53 · 11 answers · asked by eva m 3

15: 10 degrees = ____ minutes
a. 1/60
b. 10
c. 60
d. 600


16: 1 minute = ____ degree
a. 1/3600
b. 1/60
c. 10
d. 60


17: 1 minute = ____ seconds
a. 10
b. 60
c. 100
d. 3600



19: 3 degrees, 45 minutes + 2 degrees, 15 minutes = _____________
a. 5 degrees
b. 5 degrees, 60 minutes
c. 6 degrees
d. 60 degrees

help!thanks!

2007-12-19 21:21:55 · 7 answers · asked by Anonymous

2007-12-19 20:59:56 · 9 answers · asked by jonny d 1

2007-12-19 20:45:41 · 7 answers · asked by jonny d 1

does it mean 900%?

its a truck or suv commercial.

thanks

2007-12-19 20:43:25 · 3 answers · asked by viajero_intergalactico 6

cos2t=(1-tan^2(t))/(1+tan^2(t))

2007-12-19 19:56:36 · 4 answers · asked by mike m 1

1. Your wife wants you to clean the house with the vacuum cleaner. The surface of the area is 120 sq.mtr.
It takes you 40 seconds to clean 1 sq.mtr.
How long (in hours and minutes) will it take you to clean 95 sq.mtr?

2. A 1 ltr. bottle of Coke costs $1.50.
A 2.5 lrt coke costs $3.85
You purchase 12 ltrs. of Coke at the cheapest possible price.
What are you going to buy?

3. 2 2/3 + 4 3/4 (Quarters) + 5/6 =
Answer as a fraction:
Answer as a decimal fraction:

4. 1 3/4 (Quarters) + 1/2 + 2/3 =
Answer as a fraction:
Answer as a decimal fraction:

1/2 + 3/4 (Quarters) + 1/3 =
Answer as a fraction:
Answer as a decimal fraction:

Thank you for helping me with this! I'm in grade 3 and I needed some help with my studying. I couldn't ask my mum and dad cause there away on business trip.

2007-12-19 19:56:22 · 7 answers · asked by *BlueWolf* 1

2007-12-19 19:42:15 · 2 answers · asked by yuvraj singh sengar 1

You are selling a coin to a customer for $120.
However, your customer wants 15% discount. After haggling for an hour and nearly killing him, you decided to give him a 12% discount. But... he also has a trade in a coin, which he bought from you for $80 some time ago. However, you allow him 75% of his purchase price of that coin towards the purchase of the new coin.

What does your customer still have to pay you to get the new coin?

2007-12-19 19:30:37 · 3 answers · asked by *BlueWolf* 1

Solve analytically.

5^x = 4^(x+3)

2007-12-19 19:15:43 · 6 answers · asked by Gemini19 2

2007-12-19 19:01:20 · 3 answers · asked by ? 1

2007-12-19 19:00:25 · 8 answers · asked by Anonymous

2007-12-19 18:58:10 · 4 answers · asked by Anonymous

I think I know how to solve for this but when I check my answer it's incorrect. What I do is place (4/3) on both sides to cancel out (3/4) then I divide both sides by 2 and get 322.5. However, when I plug it into 2x^(3/4) I don't get 128.

2007-12-19 18:37:09 · 6 answers · asked by georgie0515 1

---> --->
OAB is a triangle with OA=a and OB=b. P and Q are the mid-points of OA and AB, respectively.

DIAGRAM--->http://i210.photobucket.com/albums/bb154/slaveg0d/diagram.jpg

---> ----> -----> ---->
a)PA b)AB c)AQ d)PQ

2007-12-19 18:29:52 · 3 answers · asked by Anonymous

solve the following differential equation

( x2 + 3xy + y2 )dx - x2dy = 0

2007-12-19 17:49:10 · 5 answers · asked by utt_sa 1

This is basically the only thing holding me back in my math class. I just need a set of steps that I can apply to each problem or a simple explanation on what it means and how you do it. I think I remember it standing for First Inside Outside Last but that doesn't really help any.

Thanks!

2007-12-19 17:46:57 · 7 answers · asked by Mr.Steven 3

(sec^2x-tanx)/1-cosx

in case anyone is confused, its secant squaredx - tangent x all over 1 - cosine x

i need to simplify using trig identities (pythagorean identies and basic stuff)

how do i do it, completely confused.

2007-12-19 17:39:50 · 2 answers · asked by goat_brother00 2

w^2 -18-3w

2007-12-19 17:35:27 · 4 answers · asked by eric j 2

2007-12-19 17:30:22 · 2 answers · asked by ~*~*SMOKEY*~*~ 1

the equation of two sides of a triangle PQR are y-3x+6=0 and 3y-4y-2=0. D is the foot of the perpendicular from P to QR and the coordinates of D are (0, 4). find the equation of QR.

please explain .. thanx

2007-12-19 17:20:40 · 5 answers · asked by Anonymous

2007-12-19 17:14:53 · 3 answers · asked by ☆♥ C&ice♥☆ 2

2007-12-19 16:59:24 · 2 answers · asked by rose 1

I'm so confused! is it Pe^rt or is it
A=P(1+r/n)^nt (A=?, P=principle, r=rate, n=?, t=time)

help me i have an algebra final tomorrow!

in Per^rt
P= principle
e=e
r=rate
t=time

2007-12-19 16:55:01 · 3 answers · asked by Anonymous

If I did 100 situps in 148 seconds approximently how many seconds does it take for me to do 1 situp? Explain to me how you got your answer please! Also how many seconds does it take for me to do 1 situp if I did 100 situps in 163 seconds.
Explain how you got your answer!
Thanks!

2007-12-19 16:18:33 · 11 answers · asked by Anonymous