Register
Help
Remember Me?
What's New?
Forum
New Posts
FAQ
Calendar
Community
Member List
Forum Actions
Mark Forums Read
Quick Links
Today's Posts
View Site Leaders
Math Lessons by Subject
Calculators/Solvers
Advanced Search
Member List
Subhotosh Khan
If this is your first visit, be sure to check out the
FAQ
by clicking the link above. You may have to
register
before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.
Subhotosh Khan
Elite Member
Find latest posts
Find latest started threads
Mini Statistics
Join Date
06-18-2007
Last Activity
Today
09:17 PM
Tab Content
Subhotosh Khan's Activity
About Me
Tab Content
All
Subhotosh Khan
Photos
New Activity (
)
Please reload this page to view the 200+ new activity items that have been created.
Older Activity
Today,
09:11 PM
Subhotosh Khan
replied to a thread
Proving a Quadrilateral is a Parallelogram: Challenge
in
Geometry and Trig
Draw AB = 10 cm and AC = 10 cm and angle BAC = 60°. Draw BD = 6 cm and CD = 6 cm. Did you get a parallelogram? Do you have two sets of...
see more
3 replies | 45 view(s)
Today,
05:06 PM
Subhotosh Khan
replied to a thread
Need help understanding these types of problems.
in
Intermediate/Advanced Algebra
I concur. I saw the OP's attempt at the solution (3x + 2y = 1800) and inferred (never assumed) that a rectangle was "suggested" in class.
see more
10 replies | 125 view(s)
Today,
02:57 PM
Subhotosh Khan
replied to a thread
Need help understanding these types of problems.
in
Intermediate/Advanced Algebra
That logic will not work here because of the fixed (but variable) cost involved.
see more
10 replies | 125 view(s)
Today,
02:50 PM
Subhotosh Khan
replied to a thread
Proving a Quadrilateral is a Parallelogram: Challenge
in
Geometry and Trig
Did you draw some figures to investigate? Note that the problem does not mention whether the given congruent sides are adjacent or not! What...
see more
3 replies | 45 view(s)
Today,
10:36 AM
Subhotosh Khan
replied to a thread
Need help understanding these types of problems.
in
Intermediate/Advanced Algebra
Let the total field be L (ft) * W (ft). Let the length of the shared fence be W (ft). Then 3 * 2 * (L + W) + 2 * W = 4800 → 3L + 4W = 2400...
see more
10 replies | 125 view(s)
Today,
10:24 AM
Subhotosh Khan
replied to a thread
Parabolic word problem.
in
Intermediate/Advanced Algebra
I believe that equation should be: h(x)= - 16t2 + 15t + 33 (watch that negative sign in front of 16) This is because your 'x' is upward...
see more
4 replies | 59 view(s)
02-15-2018,
08:50 AM
Subhotosh Khan
replied to a thread
Newton's Method for matrix-valued functions; finding square root of given matrix
in
Advanced Math
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
1 replies | 200 view(s)
02-14-2018,
12:58 PM
Subhotosh Khan
replied to a thread
A ship has a centrally mounted turbine engine w/ axis of rotation aligned along...
in
Advanced Math
What is gyroscopic couple? What is the mathematical formula that will describe it? This a dynamics problem with rotating axes of reference. ...
see more
3 replies | 164 view(s)
02-14-2018,
11:55 AM
Subhotosh Khan
replied to a thread
A ship has a centrally mounted turbine engine w/ axis of rotation aligned along...
in
Advanced Math
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
3 replies | 164 view(s)
02-13-2018,
09:33 AM
Subhotosh Khan
replied to a thread
Need help with factorisation of (x^2+2x)^2-2(x^2+2x)- 3
in
Intermediate/Advanced Algebra
(x^2+2x)^2-2(x^2+2x)- 3 substitute: u = x^2 + 2x, then, (x^2+2x)^2-2(x^2+2x)- 3 = u^2 - 2*u + 3 The above is a quadratic equation in...
see more
4 replies | 168 view(s)
02-12-2018,
05:29 PM
Subhotosh Khan
replied to a thread
Probability Theory: Imagine there is an election with 5 candidates and 20 voters.
in
Probability / Statistics
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
5 replies | 208 view(s)
02-11-2018,
05:41 PM
Subhotosh Khan
replied to a thread
Need help w/ expanding cosine fcn: (1/2)theta_1^2 + cos(theta_1) - cos(theta) =
in
Calculus
What is the McLauren series expansion of sin(Θ/2)? After you square it and a bit of tedious algebra - you should be there!
see more
4 replies | 185 view(s)
02-11-2018,
02:55 PM
Subhotosh Khan
replied to a thread
Need help w/ expanding cosine fcn: (1/2)theta_1^2 + cos(theta_1) - cos(theta) =
in
Calculus
That is a basic trigonometric relation. Do you know the angle addition rules like: cos(A+B) = cos(A) * cos(B) - sin(A) * sin(B)
see more
4 replies | 185 view(s)
02-11-2018,
11:39 AM
Subhotosh Khan
replied to a thread
Ford sold 2,480,942 new vehicles in 2014, a 29.1% increase over 2010. Find 2010 vol.
in
Intermediate/Advanced Algebra
That is not quite correct. At 2014, the # of vehicles were 29.1% more than the number of vehicles present on 2010. Let us assume the # of vehicles...
see more
4 replies | 225 view(s)
02-10-2018,
12:33 PM
Subhotosh Khan
replied to a thread
Cryptic Sport?
in
Math Odds & Ends
Write it with "white" ink - and it hides against the white background.
see more
7 replies | 387 view(s)
02-10-2018,
12:25 PM
Subhotosh Khan
replied to a thread
Need help w/: 1. E(p,m) = Ap−amb, 2. strict concavity/convexity, 3. maximize profit
in
Calculus
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
2 replies | 191 view(s)
02-09-2018,
01:26 PM
Subhotosh Khan
replied to a thread
Physical Science II - Mph of a dragster at the finish line of a race- ?
in
Calculus
Did you adjust for the length to be converted to meters?
see more
8 replies | 375 view(s)
02-08-2018,
08:47 PM
Subhotosh Khan
replied to a thread
Alg II / Pre-Calc w/ Logs: Given log_x(y)+log_y(x)=3, find log_x(y^2)+log_y(x^2)
in
Intermediate/Advanced Algebra
2logx(y)+2logy(x) ......... factor out 2 = 2 * x(y)+logy(x)] ...... continue....
see more
5 replies | 255 view(s)
02-08-2018,
01:11 PM
Subhotosh Khan
replied to a thread
Annual Compound Interest Calculation: "How would years 3 and 4 appear in the above?"
in
Intermediate/Advanced Algebra
.
see more
6 replies | 279 view(s)
02-08-2018,
11:37 AM
Subhotosh Khan
replied to a thread
Physical Science II - Mph of a dragster at the finish line of a race- ?
in
Calculus
Why did you assume a = 6*g (instead of 5.97*g)? And: Dx = 1000 ft = 304.8 meters
see more
8 replies | 375 view(s)
02-07-2018,
08:31 PM
Subhotosh Khan
replied to a thread
Annual Compound Interest Calculation: "How would years 3 and 4 appear in the above?"
in
Intermediate/Advanced Algebra
.
see more
6 replies | 279 view(s)
02-06-2018,
02:01 PM
Subhotosh Khan
replied to a thread
A probability question literally about homework
in
Probability / Statistics
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
4 replies | 229 view(s)
02-06-2018,
01:11 PM
Subhotosh Khan
replied to a thread
Can't understand this concept: lim_{x->infty} P(x)=(KP_0 e^{2x})/(K+P_0(e^{2x}-1))
in
Calculus
What would you get if you divide - both the numerator and the denominator - by e^(2x)? and then take the limit....
see more
10 replies | 390 view(s)
02-06-2018,
01:04 PM
Subhotosh Khan
replied to a thread
Not Pascal's Triangle, but does it have name or inventor? "Apex (playing-)Card Trick"
in
Intermediate/Advanced Algebra
Where did you (How did you) come across this triangle? You do have some reference (i.e. it is not completely your creation - yes?!)
see more
8 replies | 374 view(s)
02-06-2018,
08:30 AM
Subhotosh Khan
replied to a thread
Simple module: Let R be a ring with 1 and F a family of simple left R modules.
in
Advanced Math
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
1 replies | 208 view(s)
02-06-2018,
08:29 AM
Subhotosh Khan
replied to a thread
Business Mathemetics: began w/ joint capital of $790000, earned profit of $21296
in
Finance/Business Math
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
2 replies | 152 view(s)
02-05-2018,
04:49 PM
Subhotosh Khan
replied to a thread
Need help finding the rule to this pattern: 3, 4, 3, 4, 5, 3, 4, 5, _, _, _, _, _, 7
in
Arithmetic
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
5 replies | 411 view(s)
02-05-2018,
11:48 AM
Subhotosh Khan
replied to a thread
Help me to know how much was lost in a shift
in
Finance/Business Math
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
see more
6 replies | 360 view(s)
02-04-2018,
07:47 PM
Subhotosh Khan
replied to a thread
Complicated beam: slope, deflection at ends & at 3.8 m from left end
in
Intermediate/Advanced Algebra
It does matter! There are several ways to solve the problem. I was hoping that I could point you to a similar example problem in your text-book...
see more
8 replies | 421 view(s)
More Activity
No More Results
No Recent Activity
About Subhotosh Khan
Basic Information
Signature
“... mathematics is only the art of saying the same thing in different words” - B. Russell
Statistics
Total Posts
Total Posts
17,186
Posts Per Day
4.41
General Information
Last Activity
Today
09:17 PM
Join Date
06-18-2007
Referrals
2