Tuesday
September 30, 2014

Posts by Don


Total # Posts: 404

Trig
Column 1 Column 2 sec theta - cos theta tan theta sin theta Question: how do you get column 1 to be the same as column 2 ?? using the eight fundamental identities
December 17, 2011

Math C30
Eight Fundamental Identities Sec thada - Cos thada- on one side tan thada sin thada- on the other side How do you do this ???
December 17, 2011

Trig
Please disregard last question .... wrote it down wrong .. Thanks
December 17, 2011

Trig
Eight Fundamental Identities Sec thada - Cos thada How do I do this?
December 17, 2011

Math C30
The first step in solving the equation: 4 sinx - sinx = 0 is what?
November 23, 2011

Physics
If a force of 20N stretches a spring 15 cm, by what amount will the spring stretch is if a force of 80 N is applied?
November 17, 2011

Math C30
What's next? Solve: cosx(tanx + sqroot3) - sqroot3/2(tanx-sqroot3) Provide exact answers .. help
November 7, 2011

Math C30
In steps how do you go from: y = 25cos pi/200x + 30 to get the answer 44.695
November 7, 2011

trig
write equations expressing: 19cos(theta-50degrees) as a sum of sine and cosine.
November 6, 2011

Math C30 ( trig )
A roof in the shape of an upside down cosine wave is to be buile to cover an arena. The arena is 24m wide, the height of the roof at either side wall is 5m, and the maximum height of the roof is 9m. A) write a function that gives the height of the roof in terms of your ...
November 6, 2011

Math C30 ( trig )
Solve : cosxtanx + root3cosx - root3/2tanx - 3/2 = 0 Give exact answers and formula for the general solution as well as the specific solutions.. Help
November 6, 2011

MATH C30
A roof in the shape of an upside down cosine wave is to be built to cover an arena. The arena is 24 m wide, the height of the roof at either side wall is 5 m, and the max height of the roof is 9m . write the function that gives the height of the roof in terms of the distance ...
November 6, 2011

MATH C30
How to find the amplitude, period, phase shift, vertical shift, and the equation of the primary function of the function: y = -cot(1/3x - pi/6) how to find where the period begins and ends
November 6, 2011

MATH C30
Solve cosxtanx + sqroot3cosx - sqroot3/2tanx - 3/2 = 0 interval 0 to 2 pi exact answers and formula for the general solution as well as the specific solutions. Sorry Steve, missed it last night.
November 6, 2011

math c30
solve cosxtanx + root3cosx - root3/2tanx - 3/2 = 0 exact value answers and formula for the general solution and specific solutions.
November 6, 2011

math c30
what is the domain and range of the function y= -2cos 1/2 ( x + pi/4 ) -2
November 5, 2011

math c30
Solve cosxtanx + root3cosx - root3/2tanx - 3/2 = 0 exact answers and formula for general solution
November 5, 2011

Trig
Solve 2cosxsinx + sinx = 0 using unit circle.
November 2, 2011

Trig
Solve 2cos sq x = 1 using the unit circle.
November 2, 2011

Math C30
Last Question disregard .. ooops Solving Equations Containing Circular Functions .. Solve 2cos^2x=1
November 2, 2011

Math C30
Solving Equations Containing Circular Functions ... Solve 2cos^2=1
November 2, 2011

Math C30
Equations containing circular functions and unit circle... solve 2cosx sinx + sinx = 0
November 1, 2011

Math C30
using unit circle solve: 2cos sq x =1
November 1, 2011

Mathj C30
Solving Equations Containing Circular Functions : Solve 2cosx sinx + sinx = 0 when x is between 0 and 2pi
November 1, 2011

Math C30
Solving Equations Containing Circular Functions : Solve 2cos sq x =1
November 1, 2011

physics
A 130g ball moving at 0.35m/s in the x-direction is subject to a 0.25N force in the - y-direction for 1.0s. Find the magnitude of the ball's momentum change.
November 1, 2011

Physis Home work
Two 0.85Mtrs -long pendulums hang side by side. The masses of the pendulum bobs are 50g and 70g . The lighter bob is pulled aside until its string is horizontal and is then released from rest. It swings down and collides elastically with the other bob at the bottom of its arc...
November 1, 2011

Physis Home work
Two 0.85Mtrs -long pendulums hang side by side. The masses of the pendulum bobs are 50g and 70g . The lighter bob is pulled aside until its string is horizontal and is then released from rest. It swings down and collides elastically with the other bob at the bottom of its arc...
November 1, 2011

math c30
-pi/4 plus 15pi/4 divided by 2=7pi/4 how is the math done regarding the fractions (dividing and multiplying)
October 22, 2011

Math c30
Determine the period length of y=3tan 2x I had the answer to be pi , but the correct one is pi/2 How do you get that answer??
October 22, 2011

math c30 trig
Determine the period length of y= 2/3 sin (3x/2 ) I had 3pi/2 but the correct answer is 4pi/3 how do you get that???
October 22, 2011

math
thanks. this is the problem and answer from a math book. the closets i came is 103. i will ask the teacher how to get it.
October 19, 2011

math
the folowing equation 9+8x7-6x5+4x3+2=105 How do u get this?
October 19, 2011

math 10
(2squared) cubed
October 18, 2011

trig
find the exact values of the six trig functions of theta equals six pi divided by 8
October 17, 2011

Statistics
A set of 50 data values has a mean of 35 and a variance of 25. I. Find the standard score (z) for a data value = 26. II. Find the probability of a data value > 26.
October 17, 2011

Physic
A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block ...
September 28, 2011

math
count the zeros in both problems.
September 12, 2011

Ocean
Locations of hot spots remain fixed for a long time. As plates move across such hot spots, they form chains of volcanoes. The Hawaiian Islands are an example of such an island chain formed over a hot spot. Volcanoes on the Island of Hawaii are still active. Moving northwest, ...
September 12, 2011

chemistry
K = (Product/Reactant) 1.6*10^-5 = (x)^2 * 0 )/(.480)^2 x = 0.00191833261 Someone check this
September 12, 2011

Programming
Programming language is C
June 29, 2011

Programming
2. Then it should prompt the user for the input file name of the file containing the data to sort. 3. If the program can't open the file or if no file name is entered (^d or ^z is entered for EOF), it should print an error message and exit. 4. The file will contain numbers...
June 29, 2011

poetry
I need help scanning "Combing"
June 28, 2011

math
marla earned $400.00 interest over 2 years on a $4000.00 investment. jovita earned $960.00 interest over 4 yars on her $ 6000.00 investment. Who had the higher rate of interest?
June 15, 2011

chemistry
in a compound of nitrogen and oxygen, 14.0 grams of nitrogen combines with 32.0 grams of oxygen. How much oxygen is required to combine with a sample of 10.5 grams of nitrogen in producing same compound? How do you do the math?
June 6, 2011

college math 201
i have 50 feet of fence and the house will be the fourth side. i want a rectangular fence as big as possible. what re the dimensions?
May 8, 2011

math
how is the speed of a falling object determined.
March 28, 2011

math
how far weill a six foot pole fall in .02 seconds
March 25, 2011

math
how far will a six foot pole fall in .02 seconds
March 25, 2011

financial management
Your investment adviser has sent you three analyst reports for a young, growing company named Vegas Chips, Incorporated. These reports depict the company as speculative, but each one poses different projections of the company’s future growth rate in earnings and dividends...
March 25, 2011

financial management
You have been hired by first citizens bank as a financial analyst. One of your first assignments is to analyze the present financial condition of Bradley Stores, Incorporated. You are provided with the following 2009 balance sheet and income statement information for Bradley ...
March 22, 2011

Business
If one company(A) owns another company(B) and Company B owns a third company (C) is it safe to say that Company A owns part of Company C? A real life example is the sports media group TSN is 20% owned by ESPN. ESPN is then in turn 80% owned by The Walt Disney Company. Can I ...
March 14, 2011

Physical science
Assuming the puck was stationary to begin with and experiences constant acceleration, vf=vi+a*t rearrange to isolate for a, you get a=(vf-vi)/t but the initial velocity was zero, so a=vf/t once you know a, F=m*a Newton's Third says for every action there is a reaction, so ...
March 14, 2011

Chemistry
I figured it out. I used the deltaH values in the chart instead of the DeltaG value.
February 17, 2011

Chemistry
So I have had several homework problem like this and managed to solve them easily, but these two problems I cannot get the correct answer for. Using a Table of thermodynamic data, calculate the change in Gibbs free energy for each of the following reactions. In each case ...
February 17, 2011

algebra
5-a-9 =a^2-3 a+4 a+4
February 13, 2011

Chem
Consider a glass of 277 mL of water at 25°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of water use the density of water = 1.0 g/mL. I have no idea how to start this. I ...
February 1, 2011

Chemistry
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves, lowering the temperature because of the following endothermic reaction. NH4NO3(s) + H2O(l) = NH4NO3(aq) ÄH...
February 1, 2011

Math
Start with your bottom equation and isolate the x by itself on one side: x=248 248+y=150 y=??
February 1, 2011

adult education
Your investment adviser has sent you three analyst reports for a young, growing company named Vegas Chips, Incorporated. These reports depict the company as speculative, but each one poses different projections of the company’s future growth rate in earnings and dividends...
January 27, 2011

arithmetic
can you show me how to do 5/6 x 4
January 27, 2011

Mcsh
How to graph a series of line segments to make a picture such as the outline of a Christmas Tree. Such as y=2x+4,between -2 and -1 use the y1= function command on the Ti83 calculator?
January 12, 2011

math
is 2x^2-5y^2+4x-6=0 a hyperbola or an ellipse?
December 29, 2010

math
Two secant segments are drawn to a circle from a point outside the circle. The external segment of the first secant segment is 8 centimeters and its internal segment is 6 centimeters. If the entire length of the second secant segment is 28 scentimeters, what is the length of ...
December 8, 2010

Industrial Hygiene
How much vinyl chloride is needed to fill a tank of 250 liter with a 13.5 solution?
December 7, 2010

math
you mean (.5*11)/.55 ??
November 30, 2010

Chem
I got the answer to be 400. But can you explain to me those formulas? I'm still a bit confuse on how you got them. Where do these P1 and P2 and T1 and T2 come from
November 30, 2010

Chem
a container of 2.00 moles of an ideal gas as 1000 K undergoes a constant pressure and volume process in which the number of moles is increased to 5moles. what is the final temperature of the gas. How do I start this? Do I somehow use the ideal gas law?
November 30, 2010

Economics
do you know any specific article?
November 29, 2010

Economics
I need a article that talks about the competitive nature of international business. also I want to know what it means
November 29, 2010

physics please help
A woman who weighs 4.33 X10^2 N is leaning against a smooth vertical wall, as the drawing shows. The height of the wall from her shoulder to her hand is .400m the angle at which she is laying on the wall is 50 degrees and the rest of the height at which she is leaning against ...
November 28, 2010

statistics- normal approximation
Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
October 27, 2010

Calculus
Use Newton's Method with the function f(x)=x^2-2 and initial value Xo=2 to calculate x1,x2,x3. I have no idea how to do this
October 27, 2010

Chemistry (electron config)
Write electron configurations for the following ions. Tl^+ [Xe]4f^145d^8 is that correct?
October 26, 2010

Chemistry
E = h*c/L where E is the energy, h is planck's constant, c is the speed of light, and L is the wavelength.Wavelength is measure in meters, so convert 665nm to meters. I think it's 6.65*10^-7 E=(6.626*10^-34 * 3*10^8)/6.65*10^-7 I think that is how you work that one.
October 26, 2010

math
2339.98=16x solve for x I think that's how it's done.
October 26, 2010

Chemistry
Arrange the following atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K,Mg,P,Rh,and Ti. I think that the effective nuclear charge increases as you go up a group and across a period. so Rh, K, Ti, Mg, P?
October 26, 2010

Chemistry
2Fe+O2->2FeO
October 26, 2010

Chemistry
Write balanced equations for the following reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. 1. chromium (III) oxide with dilute hydrochloric acid A: Cr2O3 (s) + 6HCl (aq) ---> 2CrCl3 (s) + 3H20(l) (my phases are wrong?)
October 26, 2010

Chemistry
Arrange the following atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K,Mg,P,Rh,and Ti. I think that the effective nuclear charge increases as you go up a group and across a period. so Rh, K, Ti, Mg, P?
October 26, 2010

chemistry
Oh sorry! I didn't read the net ionic part.
October 26, 2010

chemistry
Mg + Pb-> PbMg
October 26, 2010

trig
Find the graph y = 2sin x + cos(2.5x) over the interval
October 12, 2010

algebra
if you buy 10 pizzas and cheese pizzas cost $11, write equation giving the cost "C" in dollars as a function of the number "P" of cheese pizzas you buy
October 6, 2010

chemistry
how does electronegativity and charge effect a solutions solubility
September 29, 2010

calculus
9/8pi
September 29, 2010

calculus
Let f(x) = x+1 and g(x) = -(1/5)x +3 How can we find the size of angles formed by these two lines
September 25, 2010

calculus
Let f(x) = x+1 and g(x) = -(1/5)x +3 How can we find the size of angles formed by these two lines
September 25, 2010

Calculus
Ur mom
September 24, 2010

physics
it should be in kg.
September 20, 2010

calc
Verify each limit using the limit definition Lim(2x^2 + 4)=4 X-->0
September 2, 2010

7th grade
Ceghlmosty
August 18, 2010

7th grade
Ceghlmisty
August 18, 2010

math
how do i write $3,337.55 on a check in words on?
June 29, 2010

Math
Anyone know about how much a button weighs in mg?
May 24, 2010

Geometry
If the surface area of a sphere decreases, will the value of the volume remain the same?
May 24, 2010

Algebra
Use the discriminant to determine how many real number solutions the equation has. t^2 + 8t + 16 = 0
May 23, 2010

Math
suppose that you know that a given parallelogram has at least one right angle and at least two adjacent sides that sre congruent. Can you make a conclusion about what kind of parallelogram this is? I say no because it can be a square or a rectangle.
May 23, 2010

Geometry
8)Suppose that a given parallelogram is not a rhombus or a rectangle. Which of the following can you conclude about this parallelogram? A) Its diagonals are perpendicular bisectors of each other. B) It is a square. C) Its angles are not all congruent. D) None of the above I ...
May 23, 2010

Algebra
Write an equation of the line satisfying the given conditions. Vertical line through (6, -6)
May 17, 2010

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