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Harry_the_cat
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Harry_the_cat
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03-16-2016
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05:58 PM
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Today,
05:58 PM
Harry_the_cat
replied to a thread
[Urgent] Need help with physics question
in
Intermediate/Advanced Algebra
In a 2D shape, if the dimensions are doubled (x2), then the area will be increased by a factor of 2^2 (ie x4). In a 3D shape, if the dimensions...
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5 replies | 89 view(s)
Today,
07:09 AM
Harry_the_cat
replied to a thread
Z = (3-i)/(2+pi) and p is real. If Re(Z) = 1/2, find value(s) of p
in
Calculus
\frac{-p+6}{4+p^2} = \frac{1}{2} 2(-p+6)=4+p^2 -2p+12 = 4 + p^2 which is a quadratic equation .... leaving for you to finish
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7 replies | 100 view(s)
Today,
07:00 AM
Harry_the_cat
replied to a thread
equation of tangent line
in
Calculus
Looks good to me. The equation of a line is usually expressed in standard form ax+by =c or gradient/intercept form y= mx+c. So you might want to...
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1 replies | 52 view(s)
Today,
02:24 AM
Harry_the_cat
replied to a thread
Z = (3-i)/(2+pi) and p is real. If Re(Z) = 1/2, find value(s) of p
in
Calculus
I think you do need to rationalise the denominator. Re(Z) =1/2 not Z=1/2.
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7 replies | 100 view(s)
Today,
02:23 AM
Harry_the_cat
replied to a thread
Z = (3-i)/(2+pi) and p is real. If Re(Z) = 1/2, find value(s) of p
in
Calculus
No! Z is not 1/2, Re(Z) is 1/2.
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7 replies | 100 view(s)
Today,
02:22 AM
Harry_the_cat
replied to a thread
Z = (3-i)/(2+pi) and p is real. If Re(Z) = 1/2, find value(s) of p
in
Calculus
Ok I've inserted some missing brackets. Now split your Z up into Real and imaginary parts and let Re(Z) =1/2 and solve for p.
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7 replies | 100 view(s)
Yesterday,
08:37 PM
Harry_the_cat
replied to a thread
Continuity/Discrete, Point vs Unit, Infinity question
in
Advanced Math
They don't represent the same thing!
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4 replies | 106 view(s)
Yesterday,
08:34 PM
Harry_the_cat
replied to a thread
Happy Valentine's Day!!
in
Math Odds & Ends
Wonderful! BTW what does Heaviside and signum do?
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14 replies | 226 view(s)
Yesterday,
07:10 AM
Harry_the_cat
replied to a thread
Transformational Functions
in
Differential Equations
y=(2x+1)^2 -2 = (2(x+\frac{1}{2}))^2 -2 = 4(x+\frac{1}{2})^2 -2 This represents a dilation of factor \frac{1}{4} from the y-axis, a translation to...
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2 replies | 90 view(s)
Yesterday,
06:59 AM
Harry_the_cat
replied to a thread
I disagree with instructor's answer
in
Calculus
g(f(x)) = 2 sin(x) where g is the function which calculates the diameter of a circle given its radius. g(f(x)) = 2 pi *sin(x) where g is the...
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2 replies | 85 view(s)
02-15-2019,
06:28 PM
Harry_the_cat
replied to a thread
difference between means and its standard error
in
Probability / Statistics
Have a look at http://www.vassarstats.net/dist2.html
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1 replies | 76 view(s)
02-15-2019,
06:25 PM
Harry_the_cat
replied to a thread
Continuity/Discrete, Point vs Unit, Infinity question
in
Advanced Math
A number line would go from 0 to 10, not 1 to 10. If you write out the integers from 0 to 10 (ie 11 integers), the median will be 5.
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4 replies | 106 view(s)
02-14-2019,
07:49 PM
Harry_the_cat
replied to a thread
Need help please!
in
Geometry and Trig
Q28: What is the radius of the circle? Now use that radius to find the circumference and area of the circle. Q29: (x-5)^2 + (y-1)^2 = ?? Not sure...
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1 replies | 84 view(s)
02-14-2019,
07:36 PM
Harry_the_cat
replied to a thread
Happy Valentine's Day!!
in
Math Odds & Ends
mmm4444bot, well I won't be typing that into my graphics calculator!
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14 replies | 226 view(s)
02-14-2019,
02:14 AM
Harry_the_cat
started a thread
Happy Valentine's Day!!
in
Math Odds & Ends
What do you get if you graph these parametric equations? x = 16 sin^3(t) and y = 13 cos(t) - 5 cos(2t) - 2 cos(3t) - cos(4t)
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14 replies | 226 view(s)
02-13-2019,
08:50 PM
Harry_the_cat
replied to a thread
Hard question on Similar Triangle and Trigonometry
in
Geometry and Trig
Temperature here was 34 degrees C (93 degrees F) yesterday and that's nowhere near our hottest day. Would love some snow! (The grass is always...
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20 replies | 404 view(s)
02-13-2019,
08:45 PM
Harry_the_cat
replied to a thread
Hard question on Similar Triangle and Trigonometry
in
Geometry and Trig
Just interested....what's the textbook?
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20 replies | 404 view(s)
02-13-2019,
08:40 PM
Harry_the_cat
replied to a thread
MacroEcon-- Calculating Change in Stnd. of Living
in
Finance/Business Math
Just testing this "principle" out: If old x = 10 and new x = 12, then %change in x is 20%. If old y = 8 and new y = 10, then %change in y is...
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6 replies | 173 view(s)
02-13-2019,
08:13 AM
Harry_the_cat
replied to a thread
Final rebus
in
Math Odds & Ends
No I'm thinking "last kick" means "last letter in kick =k".
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10 replies | 205 view(s)
02-13-2019,
02:40 AM
Harry_the_cat
replied to a thread
Final rebus
in
Math Odds & Ends
Last kick =k Last kick at the cat ?? Not an Aussie term - we don't kick cats down here!
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10 replies | 205 view(s)
02-12-2019,
06:19 PM
Harry_the_cat
replied to a thread
Final rebus
in
Math Odds & Ends
Im a bit stumped. Are any of these relevant? 1. F for forte = loud (thought of that because of your cryptic using P) 2. Fe = iron 2....
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10 replies | 205 view(s)
02-12-2019,
05:32 PM
Harry_the_cat
replied to a thread
Hard question on Similar Triangle and Trigonometry
in
Geometry and Trig
Did you get to drink your tea in the dark?
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20 replies | 404 view(s)
02-12-2019,
05:29 PM
Harry_the_cat
replied to a thread
Shh crypts
in
Math Odds & Ends
1. ** supper = p in super ** 2. ** super = p removed from supper ** I like your work Denis!
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11 replies | 236 view(s)
02-12-2019,
05:27 PM
Harry_the_cat
replied to a thread
Shh crypts
in
Math Odds & Ends
Yeah I've seen quietly = p in other cryptics. p=piano in music notation means soft and quiet. f=forte is the opposite
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11 replies | 236 view(s)
02-12-2019,
06:44 AM
Harry_the_cat
replied to a thread
Hard question on Similar Triangle and Trigonometry
in
Geometry and Trig
Good point. Or if we knew the (eye) height of the surveyor, it would be more realistic.
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20 replies | 404 view(s)
02-12-2019,
01:29 AM
Harry_the_cat
replied to a thread
Hard question on Similar Triangle and Trigonometry
in
Geometry and Trig
Unless I am making the same mistake as you, I agree with your answer of 652m. (Textbooks have been known to be wrong!) The equation simplifies to...
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20 replies | 404 view(s)
02-10-2019,
08:01 PM
Harry_the_cat
replied to a thread
Unlively rebus
in
Math Odds & Ends
Something to do with "evil"??
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10 replies | 291 view(s)
02-10-2019,
07:50 PM
Harry_the_cat
replied to a thread
Arithmetic Sequence
in
Arithmetic
How can you conclude that d is not negative? (1)-(2): (n-m)*d = m-n So d = -1 t_{n+m} = a + (n+m-1)*d =(a + (n-1)*d) +m*d = m +m*d = m +...
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6 replies | 215 view(s)
02-10-2019,
04:31 AM
Harry_the_cat
replied to a thread
Holey crypt
in
Math Odds & Ends
Yes we do - proper English! You guys pronounce route to rhyme with out, is that right?
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15 replies | 415 view(s)
02-10-2019,
02:34 AM
Harry_the_cat
replied to a thread
Unlively rebus
in
Math Odds & Ends
Something to do with "parallel lives" ??
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10 replies | 291 view(s)
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