Mathematics - 5 October 2006

For now * = theta
A. tan * + cot * = sec*csc*
B. 1-2sin^2* = 2cos*-1
C. (cos * - sin*)^2 + 2sin*cos* = 1
D. cos^4* - sin^4* = cos^2* - sin^2*
E. cos^ 2* - sin^2* = 1-tan^2* / 1+tan^2*
F. (sec* - tan *)^2 = 1- sin* / 1+sin*
G.(tan * / 1- cot*) + (cot* / 1- tan*) = 1+tan* + cot*
H. (1+tan* / 1-tan*) = (cos* + sin* / cos* - sin*)
I. (sin* / csc* - 1) - (sin* / cot^2) = tan^2*

Try and answer...thnx!

2006-10-05 23:48:20 · 6 answers · asked by Lorenz 2

If the first pair begin breeding in march and are capeable of a litter averaging 5, of which two are female,every month through to the end of september and each successive female of each litter reaches maturity and begins breeding at 4 months of age what will be the total number of offspring in one season, allowing for a 50% mortality rate on each litter. Only three days after producing a litter a rabbit can be pregnant again.

2006-10-05 23:21:27 · 4 answers · asked by Anonymous

Add the numbers:

Nineteen minus five =

4 + 3 x 2 =

6 - 5 =

Answer = 2106

I saw this puzzle on the mint on ITV1 last tuesday night (03 oct)
and they got the answer 2106, which turned out to be right, how can you get that high number from these numbers?

2006-10-05 22:23:34 · 14 answers · asked by sunset_bridge 2

g(x)=5x^5+2x^1ln(x)...they want us to find g`(e), which is finding derivative of g(x) and then plugging in e.
.. i got stuck after 25x^4 =(

2006-10-05 22:14:36 · 6 answers · asked by Slevin Kelevra 2

A ship started from port and moving with I miles per hour and another ship started from L and moving with H miles per hour. At which place these two ships meet?

do plz explain with a fig plz

2006-10-05 22:06:43 · 4 answers · asked by yamuna s 1

Tell from your experience one out of
a) Newton-Raphson
b) Steepest Descent
c) Levenburg-Marquardt
d) Gauss Newton
e) other-please specify

Preferences are that the method should converge and should not take extremely large computation time.

2006-10-05 21:48:05 · 4 answers · asked by energyconscious 4

2006-10-05 21:42:49 · 7 answers · asked by Anonymous

2006-10-05 21:01:06 · 6 answers · asked by Arun P 1

2006-10-05 20:33:12 · 10 answers · asked by praveen k 1

2006-10-05 20:10:38 · 9 answers · asked by pavan kumar NC 2

2006-10-05 20:09:17 · 11 answers · asked by 6ft5inallman 2

one mom is 21 years older then her child and in 6 years the child is going to be five times younger what age is the child and where si the father

2006-10-05 19:54:29 · 6 answers · asked by Anonymous

here, 4 is the power of tan and cot, for example, 8 = 2 having power 3.

2006-10-05 19:45:36 · 6 answers · asked by rohit 1

2006-10-05 19:44:09 · 14 answers · asked by Anonymous

2006-10-05 19:23:24 · 13 answers · asked by arch 1

dy/dx(1)= x^5+3e^xsin(x)+e^3
they want me to find the derivative of that andplug in one, but i keep gtting stuck in the e and sinx section. can someone help me ?

2006-10-05 19:21:47 · 3 answers · asked by Slevin Kelevra 2

-1.7, 3/2, -1, 1.3, -5/4, -2, 7/9, please, thanks

2006-10-05 19:02:53 · 12 answers · asked by Anonymous

A person, who decided to go to weekend trip should not exceed 8 hours driving in a day. Average speed of forward journey is 40 m/h. Due to traffic in Sundays, the return journey average speed is 30 m/h. How far he can select a picnic spot?

with clear stpes plz..

2006-10-05 19:02:26 · 6 answers · asked by yamuna s 1

I know that 5280 ft equal 1 mile. What is the math formula that will give me how many miles 400 ft are? In other words what percent of a mile will 400 ft represent?

2006-10-05 18:51:46 · 9 answers · asked by Anonymous

If a hamburger costs 30 cents more than a hot dog and 20 cents less than a cheeseburger, and 3 hamburgers cost 75 cents less than 2 hamburgers and 2 cheeseburgers. How much does the hamburger cost?

2006-10-05 18:44:33 · 9 answers · asked by Leanne C 1

Let U and V be subspaces of a vector space W. Prove that their intersection U (intersection) V is also a subspace of W.

I don't understand. If U lies in W, how could the intersection EVER be outside of W?

2006-10-05 18:27:32 · 2 answers · asked by Sean H 2

2006-10-05 18:19:32 · 5 answers · asked by Nikhet.F 1

QUESTION:
"A winch at the top of a 12-meter building pulls a pipe of the same length to a vertical position. The winch pulls the rope in at a rate of -0.2 meters per second. Find the rate of vertical and the rate of horizontal change at the end of the pipe when y=6"

Please show me how to do this. Thank you.

2006-10-05 18:05:05 · 1 answers · asked by Elk n' Fresh 4

If I have a two-dimensional matrix, such that I know the sums of the rows and the columns, and that all the elements are in the set of integers [1..9], is there a simple way, other than guess-and-test, to determine each element? Let me set it up:

[a b]
[c d]

a + b = w, c + d = x, a + c = y, and b + d = z. a <> b, c <> d,
a <> c, and b <> d. If I know w, x, y, and z, how do I find a, b, c, and d?

And...go!

2006-10-05 18:03:18 · 2 answers · asked by supensa 6

Show: Q[sqrt(3)] is a subfield of R (the real numbers).
I know to show this, the following must be true:
1) a + b is an element of Q
2) (a)(b) is an element of Q
3) Of is an element of Q
4) a + x = 0f has a solution in Q
5) 1f is an element of Q
6) if a is an element of Q and a is not equal to 0f, then the solution of (a)(x) =1f is in Q

I'm not really sure how to show any of these, so any help would be greatly appreciated! Thanks!

2006-10-05 17:52:32 · 3 answers · asked by jjodom1010 3

i think the answer is one but i dont know how to get it....thanks

2006-10-05 17:51:22 · 6 answers · asked by ice_cream_chico11 1

I'm trying to recall a "false proof" that I saw once a long time ago. First, what I mean by "false proof" is a seemingly logical set of statements that leads to an obviously false conclusion. The most famous example would be the proof that 2 = 1.

Years ago, I watched a professor develop a proof in class which resulted in "proving" that all angles were 60 degrees! But I can't remember the steps at all, not to mention where the fallacy lies. Has anyone seen this construction before?

2006-10-05 17:22:00 · 3 answers · asked by HiwM 3

what do I do? I need help

2006-10-05 17:15:20 · 9 answers · asked by Deb P 1

integrate xe^(-x)dx ,(0,positve infinity)?.......i can integrate this shall i use the integration by when i set the u is equal to -x the differential is -dx,theres a dx but how can i make the du equal to xdx ?

2006-10-05 17:14:43 · 5 answers · asked by ice_cream_chico11 1

2006-10-05 17:14:07 · 7 answers · asked by Anonymous