Saturday

January 31, 2015

January 31, 2015

Total # Posts: 528

**Trig**

The radius of: (x+2)^2 + (y-3)^2 =9 is 3 is this correct?
*January 4, 2012*

**Trig**

If the center of a circle is at (2,2) with a radius of 4 the equation of the graph would be : a) (x-2)^2 + (y-2)^2 = 16 b) (x+2)^2 + (y+2)^2 = 16 I think it would be b is that correct?
*January 4, 2012*

**Trig**

Oops, brain fart ... answer is -4/5 i guess it was a long day ... thanks anyway .. Don
*January 2, 2012*

**Trig**

Half Angle Identities cosx = 7/25 greater than 270 deg and less than 360 Determine cos 1/2x a. -7rt2/10 b. 7rt2/5 c.7/25 d.-4/5 I get 7rt2/5 Is this correct??
*January 2, 2012*

**Trig**

Half angle identities Find exact values of a) cos 1/2 b) sin 1/2 c) tan 1/2 based on: cos = 1/5 greater than 270 deg less than 360 deg. I get a) - rt 3/5 b) rt24/5 and c) does not work out at all .... Help please.. book says for answers a)-rt15/5 b) rt10/5 c) -rt6/3 How do you...
*January 1, 2012*

**Trig**

Found my mistake .... All is good now Thanks for the help earlier Damon Don
*December 27, 2011*

**Trig**

If sinx = 1/4 Find the exact value of cos2x I used the formula for double angle identities : cos2x = 1-2sin^2x and got the answer 1/2 The book says the answer is 7/8 How would they get to that conclusion?
*December 27, 2011*

**Trig**

The answer is 1/8 Is that correct Damon ?
*December 27, 2011*

**Trig**

If tanx = 2/3 tany = 1/2 then tan(x-y) = ?? a.7/4 b.7/6 c.1/8 d.8/6 which answer is correct ??
*December 27, 2011*

**Trig**

= sin (a+b) = sin 70 Is that right Damon ?
*December 27, 2011*

**Trig**

sin45cos25 + cos45sin25 = ?? a. cos70 b. sin70 c. cos20 d. sin 20 which answer is correct ??
*December 27, 2011*

**Trig**

cos45cos25 - sin 45sin25 = ?? a. cos70 b. sin70 c. cos 20 d. sin 20 which answer is correct ?
*December 27, 2011*

**Trig**

Use reduction identities to determine if the following statement is true or false: tan (A-B) = tan (B-A) Is this starement True or False ?
*December 22, 2011*

**Trig**

Rewrite tan 88 deg in terms of its cofunction How does that end up????
*December 22, 2011*

**Trig**

cot (tan + cot) = ?
*December 20, 2011*

**Trig**

( sec -1 )(sec +1 ) = ?
*December 20, 2011*

**Trig**

sin/tan = ?
*December 20, 2011*

**Trig - Thanks Damon and Lindsey**

Thanks a bunch
*December 20, 2011*

**Trig**

If sin = 2/3 and is a second quadrant angle, determine the exact value of sec^2 could be a. 5/9 b. root5/3 c. 9/4 d. 9/5 Please help.......
*December 20, 2011*

**Trig**

The next two steps in solving this trig identity question are ??? 1/csctheta x costheta x sintheta x sectheta = sinsqtheta arghhh need help please
*December 17, 2011*

**Trig**

Prove the equation is an identity : csc3theta - csctheta + cottheta/csctheta = cotsqtheta + costheta wow ... try that one
*December 17, 2011*

**Trig**

Prove that the equation is an identity: cot4theta - csc4theta = -cot sq theta - csc sq theta How ??
*December 17, 2011*

**Trig - Thanks Damon**

Thanks for the help Damon. Much appreciated. Don
*December 17, 2011*

**Trig**

Column 1 Column 2 (sin theta + cos theta)sq 1 + 2sin theta cos theta Question : how do you get column 1 to be the same as column 2?? using the trig identities
*December 17, 2011*

**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*

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