Mathematics - 4 September 2007

I know that the pythagoras' theorem is A squared plus B squared equals C squared. Can anyone tell me why this is true please put diagrams and also explanation. must be in Year 8 Maths.

2007-09-04 23:54:55 · 8 answers · asked by james 2

I got this question where you have to prove that a parralelogram that had all four of its vertices touching the circle was a rectangle.
I was wondering if anybody could explain how to do it.
Thanks

2007-09-04 22:52:26 · 7 answers · asked by Anonymous

cosecx / cotx + tanx = cosx

these trig stuff is difficult for me ): in addition to the solution, please add some basic tips and tricks/shortcuts to solving identites.

2007-09-04 22:49:05 · 6 answers · asked by Kendra 3

hi all,
i have a few maths questions i would like to ask..
thanks to those who attempt to answer

1) On average, a baby is born somewhere in the world every 2 seconds. How many babies are born each year?

2) Is the variable "number of road facilities":
A-Ordinal
B-Nominal
C-Continuous
D-Discrete

3) Find the sum of all the two digit numbers that are made up of 2 even numbers.

Many, many thanks!!

2007-09-04 22:37:25 · 5 answers · asked by i love...love 2

2007-09-04 22:32:17 · 16 answers · asked by Anonymous

I am working on my algebra figuring the distance ... I have totally forgotten how to simplify a square root. Can someone please assist me here?

The answer is sq rt of 50 and the back of the book says the simplified answer is 2 sq rt of 17 and I have no idea how they got that.

Thank you in advance for any help you have to offer.

Candi

2007-09-04 22:15:01 · 8 answers · asked by snugga_bug 1

2007-09-04 21:54:34 · 10 answers · asked by Anonymous

i think it is impossible

cos2x = cos^4 - sin ^4

please help
how to prove this

2007-09-04 21:52:35 · 7 answers · asked by master bert 2

this is for my son,thanx for the help.

2007-09-04 21:21:11 · 8 answers · asked by V man 3

(1 + sin2x) / (cos2x) = (cosx + sinx) / (cosx - sinx)

2007-09-04 21:15:28 · 4 answers · asked by master bert 2

If the interger being subtracted is GREATER than the other interger, is the answer is negative or positive?







If the interger being subtracted is LESS than the other interger, is the answer is negative or positive?













I know it's Grade 5 Math.

2007-09-04 21:06:57 · 7 answers · asked by SCOOOOOOByyyyyyyyyyyyyyy-dddooo! 2

Find the exact value of sin (pi/3-pi/4)

2007-09-04 20:45:48 · 6 answers · asked by Anonymous

lim x-9/sqrt(x) - 3 as x approaches 9

2007-09-04 20:34:02 · 2 answers · asked by 2789 2

Tom leaves Detroit at 9:00 pm and drives at a constant speed west along I-96. He passes Ann Arbor, 40 mi from Detroit, at 9:40 pm.

a- express the distance traveled in terms of the time (in hours) elapsed.

b- what does the slope represent?

2007-09-04 20:31:59 · 2 answers · asked by Rrrr0001 1

Find the exact value of tan(sin^ -1((-4/5))

2007-09-04 20:28:13 · 7 answers · asked by Anonymous

Find the exact value of cos^ -1((cos(4pi/3))

2007-09-04 20:19:54 · 3 answers · asked by Anonymous

2007-09-04 20:13:20 · 1 answers · asked by Kel 2

f(x) = ( 5x^3-10x^2 ) / ( x - 2 ) x not equal to 2

k x equal to 2

2007-09-04 20:09:43 · 4 answers · asked by i<3WL 2

Simplify the expression cos(2x) + 2sin^2x.

2007-09-04 20:06:27 · 5 answers · asked by Anonymous

An electrical circuit switches instantaneously from a 6 volt battery to a 12 volt battery 7 seconds after being turned on.

Graph the battery voltage against time.

Give formulas for the function represented by your graph.

2007-09-04 19:51:27 · 3 answers · asked by i<3WL 2

y = -2x 2(squared) + 11x + 21

How do I work this out manually?
Can I use the quadratic formula?

2007-09-04 19:48:03 · 2 answers · asked by Anonymous

Given a well-mixed deck,what is the probability that neither dealer nor you are dealt blackjack?

- A two-card hand of 21 (an ace plus a ten-value card) is called a "blackjack".

2007-09-04 19:38:44 · 3 answers · asked by Express F 1

(x^3 - xy^2 )..... ( x^2 + xy ) ... y
------------- ...... x ------------------ x----------
x^2 + 2xy + y^2 ) ..... ( x^2y - xy^3 ) .... x^2


(a^2 b - ab^2 ) .... ( a^2 - b^2 ) ... ....... ... (b^2)
---------------- x ----------------- ----- x -----------
(a + b ) ................. ( ab^2 - b^3) ............... (a^2 - ab)


(a^3 - 3a^2).......... (b^2 - 4) ...... .... ...... (ab - 2a)
----------------- x --------------------- divided by ------------------------
(b^2 + 2b) ...... ........ (a^2 b - 3 ab) ... ... .. .... (b^2 - b^3)


(x^3 + y^3) ..... (x^2 - xy - 6y^2)...... . (x^2-xy+y^2)
------------------------- x ------------------------ divided by-----------------
(x^2 + 3xy + 2y^2) ....... ( x^2 - 2xy - 3y^2) ....... (2x^2 + 2xy).....

2007-09-04 19:20:54 · 2 answers · asked by Anonymous

2007-09-04 19:20:15 · 5 answers · asked by taraki 3

Find all solutions to the equation tan x = 1
a. x=pi/4+pi(n)
b. x=pi/4 2+2pi(n)
c. x=3pi/4+pi(n)
d. 3pi/4+pi(n)

2007-09-04 19:12:52 · 1 answers · asked by austin 1

what is ^ in maths

2007-09-04 18:59:18 · 10 answers · asked by harishsatishchandra 1

What is the answer to this equation and how do I solve it?

2007-09-04 18:48:22 · 11 answers · asked by Elroy B 1

Find the simple interest earned on $15000 if the rate is:
a. 5.6% p.a. for 3years
b. 4.25% p.a. for 7months

2007-09-04 18:02:23 · 4 answers · asked by ebneter_chick 1

1) Two cars leave Chicago at the same time, heading the same direction. One travels at 60 miles per hour, and the other travels at 45 miles per hour. In how long will the fast car be 90 miles ahead of the slower car.


2) Find two consecutive even integers so that the sum of the first, and 4 times the second number is 158.

My friends told me they were easy but I can't figure them out .

2007-09-04 18:00:47 · 4 answers · asked by Hi 3

2007-09-04 17:57:02 · 4 answers · asked by jennifer f 1