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Subhotosh Khan
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Subhotosh Khan
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Join Date
06-18-2007
Last Activity
Yesterday
09:38 PM
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Yesterday,
06:05 PM
Subhotosh Khan
replied to a thread
please help solve: isosceles triangle ABC, right angled at B, w/ square inscribed
in
Geometry and Trig
What is the measure of the angle BAC? angle BCA? Do you know Pythagoras's Theorem? Do you know laws of sines and cosines for a triangle?
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3 replies | 65 view(s)
Yesterday,
01:20 PM
Subhotosh Khan
replied to a thread
please help solve: isosceles triangle ABC, right angled at B, w/ square inscribed
in
Geometry and Trig
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...
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3 replies | 65 view(s)
Yesterday,
11:19 AM
Subhotosh Khan
replied to a thread
Find the Domain for: 1) f(x)=arcsin(tg2x) and 2)f(x)=arcsin(sqrt(3)tgx)
in
Intermediate/Advanced Algebra
What is the range of domain function? You already know that the domain of arcsin is -1 to +1. So the value of tan(2x) must be -1 ≤ tan(2x) ≤ 1...
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6 replies | 94 view(s)
Yesterday,
06:45 AM
Subhotosh Khan
replied to a thread
Find maxima and minima for U(x,y,z) = x^2+y^2+z^2 with constraint of ellipsoid
in
Calculus
How did you calculate the critical points? Please share work.
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2 replies | 69 view(s)
Yesterday,
06:40 AM
Subhotosh Khan
replied to a thread
Height/Width of a mug, and how many fl oz it has
in
Pre-Algebra
What is the shape of the mug - cylindrical, truncated cone, rectangular prism ..... ?
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3 replies | 65 view(s)
Yesterday,
06:37 AM
Subhotosh Khan
replied to a thread
Calc 2: birth rate b(t) = 2300e^0.021t ,death rate is d(t)= 1440e^0.017t (people/yr)
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...
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2 replies | 50 view(s)
Yesterday,
06:35 AM
Subhotosh Khan
replied to a thread
Calc 2: Midpoint Rule (n=5) to find wing's cross-section if a = 210.
in
Calculus
This is a straight forward numerical integration problem! What are your thoughts? Please share your work with us ...even if you know it is...
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1 replies | 31 view(s)
06-22-2017,
02:33 PM
Subhotosh Khan
replied to a thread
adding %: We define a % increase of a No from a value x to another value y, y>x,...
in
Pre-Algebra
\frac{(360+600)-(300+400)}{700}*100 \ = \frac{260}{7}% \ = \ 37. 1%
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3 replies | 104 view(s)
06-22-2017,
11:53 AM
Subhotosh Khan
replied to a thread
Finding domain for composite fcns: f(x) = 6/(x-3), g(x) = 1/x; f(g(x)), g(f(x))
in
Intermediate/Advanced Algebra
What would be the domain of f(x)? What would f look like?
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2 replies | 79 view(s)
06-21-2017,
11:19 AM
Subhotosh Khan
replied to a thread
Help! "Asha needs at least 1 worker for every 30 visitors to the car show...."
in
Arithmetic
For 30 visitors Asha needs 1 worker. For 60 ( = 2*30) visitors, Asha needs (1*2 =) 2 workers. For 90 ( = 3*30) visitors, Asha needs (1*3 =)...
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2 replies | 96 view(s)
06-21-2017,
11:14 AM
Subhotosh Khan
replied to a thread
Ratio: Does she have enough flour to make play dough for 16 kids?
in
Arithmetic
How much flour does she need for 2 kids? How much flour does she need for 4 kids? How much flour does she need for 8 kids? How much flour...
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4 replies | 133 view(s)
06-21-2017,
07:08 AM
Subhotosh Khan
replied to a thread
Need help with 11 Algebra 2 problems
in
Intermediate/Advanced Algebra
First, post the pictures in portrait orientation (90° turn). Second, include your work/thought so that we know where to begin to help you.
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2 replies | 104 view(s)
06-21-2017,
07:03 AM
Subhotosh Khan
replied to a thread
Using the PMT function
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...
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2 replies | 78 view(s)
06-21-2017,
07:01 AM
Subhotosh Khan
replied to a thread
Rules for divisibility when its not base 10
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...
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1 replies | 55 view(s)
06-20-2017,
07:23 PM
Subhotosh Khan
replied to a thread
competition practice Qs: length of strip forming octagon; time to paint room;...
in
Advanced Math
Then each side of the octagon = √2 in
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7 replies | 231 view(s)
06-20-2017,
09:51 AM
Subhotosh Khan
replied to a thread
Trig equation: cos(3π/2−2x)+sin(π−3x)=sin(3x)−cos(x)
in
Geometry and Trig
Was your domain restricted like: 0 ≤ x ≤ π/2
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10 replies | 239 view(s)
06-19-2017,
06:49 PM
Subhotosh Khan
replied to a thread
Weighing Problem - paraphrased: There are 10 bags of gold coins...
in
Intermediate/Advanced Algebra
Another hint: 1, 4, 9, 16, 25........81, 100. Edit: No that does not work .... 42 + 72 = 12 + 82
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4 replies | 360 view(s)
06-19-2017,
02:04 PM
Subhotosh Khan
replied to a thread
Trig equation: cos(3π/2−2x)+sin(π−3x)=sin(3x)−cos(x)
in
Geometry and Trig
If you put x = 30°, do you satisfy the given equation:
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10 replies | 239 view(s)
06-19-2017,
11:45 AM
Subhotosh Khan
replied to a thread
Trig equation: cos(3π/2−2x)+sin(π−3x)=sin(3x)−cos(x)
in
Geometry and Trig
cos(3π/2−2x)+sin(π−3x)=sin(3x)−cos(x) Useful identities for this problem: cos(π/2 - Θ) = ? cos(π - Θ) = ? sin(π - Θ) = ?
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10 replies | 239 view(s)
06-19-2017,
07:51 AM
Subhotosh Khan
replied to a thread
eBay & PayPal fees + My Profit %
in
Finance/Business Math
As I understand your problem: Your purchase price = P (including VAT) Your list price = L Your cost = C = P + 0.2 + 0.034 * L + 0.35 + 0.08...
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1 replies | 106 view(s)
06-19-2017,
07:20 AM
Subhotosh Khan
replied to a thread
v-Bulletin issues of late
in
Administration Issues
I second that....
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28 replies | 2907 view(s)
06-18-2017,
07:05 PM
Subhotosh Khan
replied to a thread
Simultaneous equations (tough one): 8^x 64^y = 128, sqrt[12y - 7] = x
in
Intermediate/Advanced Algebra
18y2 - 60y + 35 = 0 This is a quadratic equation. You do know how to solve this for y. Correct?
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18 replies | 515 view(s)
06-18-2017,
06:42 PM
Subhotosh Khan
replied to a thread
competition practice Qs: length of strip forming octagon; time to paint room;...
in
Advanced Math
18) What is the definition of regular polygon?
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7 replies | 231 view(s)
06-17-2017,
12:45 PM
Subhotosh Khan
replied to a thread
Is that answer correct? 5/+81.87* (4-j3+(3sqrt[2]/-45*)/(7-j1))
in
Advanced Math
I am not familiar with the notation used. But looking at the answer suggests: 88.162\, \underline{\diagup 30.127^{\circ}} \, =88.162
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13 replies | 446 view(s)
06-17-2017,
11:01 AM
Subhotosh Khan
replied to a thread
Fundamental question: we know that y = x dy/dx, or rather... y/x = dy/dx...
in
Differential Equations
Yes it is contradiction - and it says that: y =x^2 is NOT a solution for: y = x dy/dx ..... !
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3 replies | 213 view(s)
06-17-2017,
10:43 AM
Subhotosh Khan
replied to a thread
College level trig: what is the 30' part of Tan 62 degrees 30' ?
in
Geometry and Trig
What did you get for cot(57.5) in your calculator? You probably calculated tan instead of cot!
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10 replies | 406 view(s)
06-16-2017,
08:39 AM
Subhotosh Khan
replied to a thread
College level trig: what is the 30' part of Tan 62 degrees 30' ?
in
Geometry and Trig
1° = 60' ← read as 1 degree = 60 minutes
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10 replies | 406 view(s)
06-15-2017,
09:02 PM
Subhotosh Khan
replied to a thread
Trigo, help pls: 2sin^2 (5x/2) + 4sin^2 (x/2)=3+cosx
in
Geometry and Trig
sin(5x/2) = sin(2x + x/2) = sin(2x)* cos(x/2) + cos(2x)*sin(x/2) = 2* sin(x)*cos(x)*cos(x/2) + *sin(x/2) = 4*...
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3 replies | 152 view(s)
06-15-2017,
05:30 PM
Subhotosh Khan
replied to a thread
Solve the system of DE: dx/dt + 2x/t = 1, dy/dt = x + y + 2x/t - 1
in
Differential Equations
You got it!! Nothing else to do.
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4 replies | 233 view(s)
06-15-2017,
02:55 PM
Subhotosh Khan
replied to a thread
Solve the system of DE: dx/dt + 2x/t = 1, dy/dt = x + y + 2x/t - 1
in
Differential Equations
Where is the constant of integration? What did they ask you to do?
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4 replies | 233 view(s)
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About Subhotosh Khan
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“... mathematics is only the art of saying the same thing in different words” - B. Russell
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Last Activity
Yesterday
09:38 PM
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06-18-2007
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