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June 11, 2024, 12:03:50 am
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Author Topic: Silly Questions Thread  (Read 21318 times)  Share 

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TrueTears

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Re: Silly Questions Thread
« Reply #15 on: January 05, 2010, 09:48:24 pm »
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see I knew tolga posted this one, http://vcenotes.com/forum/index.php/topic,21331.msg216339.html#msg216339

Was this from essentials? I can't remember it.
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brightsky

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Re: Silly Questions Thread
« Reply #16 on: January 05, 2010, 09:52:25 pm »
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On my calculator, it says that a = 1/2 and n = 192...but by hand it would be tougher...
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Aqualim

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Re: Silly Questions Thread
« Reply #17 on: January 05, 2010, 11:26:38 pm »
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I guess i'll wait till my Solutions supplement comes in to see how they did it. Thanks for you help :)
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brightsky

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Re: Silly Questions Thread
« Reply #18 on: January 06, 2010, 01:00:41 pm »
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Given that where is an acute angle, can be expressed as:

A.

B.

C.

D.

E. Other

I've been staring at this question for the past 20 mins....:p
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cipherpol

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Re: Silly Questions Thread
« Reply #19 on: January 06, 2010, 01:09:46 pm »
0








sub into
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brightsky

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Re: Silly Questions Thread
« Reply #20 on: January 06, 2010, 01:21:57 pm »
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Oh yes! Thanks!  :D
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Ilovemathsmeth

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Re: Silly Questions Thread
« Reply #21 on: January 12, 2010, 12:11:49 am »
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Yep for those questions you could also visualise it with a triangle. Using pythagoras you could obtain the value for and then substitute in the formula for tan.
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Aqualim

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Re: Silly Questions Thread
« Reply #22 on: January 15, 2010, 04:37:29 pm »
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Being trying to find the x-intercepts of this equation, and can't seem to get the right answer.
Calculator says and







Now I'm stuck..
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brightsky

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Re: Silly Questions Thread
« Reply #23 on: January 15, 2010, 04:43:46 pm »
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Then....

Case 1









Case 2







« Last Edit: January 15, 2010, 04:46:32 pm by brightsky »
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Aqualim

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Re: Silly Questions Thread
« Reply #24 on: January 15, 2010, 04:47:00 pm »
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ahh makes sense, because the 2 can represent both positive and negative.. probably why I kept getting 99 and not 35, Thanks for that
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brightsky

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Re: Silly Questions Thread
« Reply #25 on: January 15, 2010, 04:47:45 pm »
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np
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Aqualim

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Re: Silly Questions Thread
« Reply #26 on: January 17, 2010, 01:24:25 pm »
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Just a question regarding Sum, Difference and Product Functions, How reliable/accurate is the table of values for working out the points of ? Seeing as I found this method to be easier to find the general shape of the graph. (mainly because I didn't know how to find the intersection point) :)

Also how do you know what shape will take once it is drawn? e.g. Square Root, Hyperbolic etc.
As when i've drawn graphs, I've found that the square root graphs can look like linear graphs aswell.
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the.watchman

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Re: Silly Questions Thread
« Reply #27 on: January 17, 2010, 01:49:17 pm »
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Couldn't you sketch each function individually, then add the ordinates to get ?
That's what I usually do, it's more accurate than a table of values
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Aqualim

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Re: Silly Questions Thread
« Reply #28 on: January 17, 2010, 07:37:08 pm »
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Quote from: the.watchman on January 17, 2010, 01:49:17 pm
Couldn't you sketch each function individually, then add the ordinates to get ?
That's what I usually do, it's more accurate than a table of values

Which ordinates in particular though? y-intercepts, x-intercepts?
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the.watchman

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Re: Silly Questions Thread
« Reply #29 on: January 17, 2010, 08:23:08 pm »
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Quote from: Aqualim on January 17, 2010, 07:37:08 pm
Quote from: the.watchman on January 17, 2010, 01:49:17 pm
Couldn't you sketch each function individually, then add the ordinates to get ?
That's what I usually do, it's more accurate than a table of values

Which ordinates in particular though? y-intercepts, x-intercepts?

Look for:

When either y-value equals zero
When both y-values are the same
When one is positive and negative (cancelling out)

Then join the rest
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Remember, remember the 5th of November

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