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#3276 Re: Exercises » Is this cool with you? » 2011-02-02 14:35:23
Hi bobbym,
I changed my answer, sorry for the delay.
#3277 Re: Exercises » Is this cool with you? » 2011-02-02 06:56:31
Hi bobbym,
No problem, accidents happen.
I have just hidden the original answer, I hope you won't mind.
#3278 Re: Exercises » What do you think? » 2011-02-02 06:46:46
Yeah, but that error wasn't too much... Anyway, glad that they corrected it.
#3279 Re: Exercises » Is this cool with you? » 2011-02-02 06:30:13
Hi bobbym,
#3280 Re: Exercises » What do you think? » 2011-02-02 06:15:21
Good that you discovered the problem with old version, you can avoid the errors in future!
As for the test score's problem, I couldn't find a solution. Can you post the solution, if you are willing?!
#3281 Re: Exercises » What do you think? » 2011-02-02 05:59:27
Hi bobbym,
Thanks for the problem !
#3282 Re: Exercises » What do you think? » 2011-02-02 05:10:52
Oh, good that you found it out!
If any calculation is simple enough, I always double check with a calculator.
#3283 Re: Exercises » What do you think? » 2011-02-02 04:53:28
Anyway, did you solve the problem with that angle? What is the final answer you get? It may not deviate much...
#3284 Re: Exercises » What do you think? » 2011-02-02 04:44:32
Yes, it is a tangent... Did you do something else?
#3285 Re: Exercises » What do you think? » 2011-02-02 04:35:40
It measures angle in counter clockwise direction.
If you measured angle[A,O,B], then try angle[B,O,A]
#3286 Re: Exercises » What do you think? » 2011-02-02 04:25:33
I get that value in geogebra too...
#3287 Re: Exercises » What do you think? » 2011-02-02 04:11:09
I did not use that site for calculation.
But how did you get your value?
#3288 Re: Exercises » What do you think? » 2011-02-02 03:56:57
Hi,
Isn't it (acos(6/7))⋅2 = 62.0054?
#3289 Re: Exercises » What do you think? » 2011-02-02 01:30:41
Hi,
#3290 Re: Exercises » What do you think? » 2011-02-01 22:55:29
Hi bobbym,
What is the earliest time that all 3 ants are out of sight of each other?
Is it out of line-of-sight, as in : http://www.neoprogrammics.com/spheres/distance_to_horizon.php
#3291 Re: Help Me ! » A level Maths - Binomial Expansion » 2011-02-01 04:55:02
Hi,
It's easy if you know binomial expansion.
For Q1)
the expansion: p^6*x^6 - 12*p^5*x^5 + 60*p^4*x^4 - 160*p^3*x^3 + 240*p^2*x^2 - 192*p*x + 64
Next you equate the co-efficients:
for x^2,
240*p^2 = 135
therefore, p = 3/4
for x,
A = -192*p = -144
Try the second question similarly, math is fun, you must learn!
#3292 Re: This is Cool » MS.x MATH-new basis » 2011-01-30 21:37:06
I only see some digits in different number systems, and words which I cannot comprahend as a sentence. Are you defining new meanings to words normal people use?
#3293 Re: Help Me ! » Solve for x! » 2011-01-30 19:27:53
This is wolframalpha's output : x = a+b+c and (a*b*c)*(a+b+c)≠0
#3294 Re: Help Me ! » Solve for x! » 2011-01-30 14:40:14
Hi bobbym and bob,
It's okay, let's forget it.
Guessing the answer was easy 
(In fact, we still don't know for sure that this was the question.)
I'm sure the question is correct. I've seen it before.
#3295 Re: Help Me ! » Solve for x! » 2011-01-30 02:09:24
Hi bob,
I am also having problem to solve it!
But I remember I had it in high school, it's a matter of taking common factor out. Cannot find the common factor!
#3296 Re: Help Me ! » Solve for x! » 2011-01-30 01:51:01
Hi,
*deleted the answer*
#3297 Re: Help Me ! » How much does the reflected ray rotate? » 2011-01-29 23:35:28
http://www.splung.com/content/sid/4/page/planemirrors
#3298 Re: Help Me ! » How much does the reflected ray rotate? » 2011-01-29 23:25:43
Hi,
The reflected ray turns through an angle 2x. (angle of incidence = angle of reflection. When mirror is turned through an angle x, angle of incidence becomes x)
#3299 Re: Exercises » Is this cool with you? » 2011-01-29 21:05:45
Hi,
Hmm, I was looking at the frequency plot of possible credits. Reading your reply, I think it must be simpler than that!
#3300 Re: Exercises » Is this cool with you? » 2011-01-29 20:42:04
Hi bobbym,
Can we do it without knowing the credit points for passing?