| Subject | Date Asked | Expert |
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| Trig Identites | 5/11/2008 | Scott A Wilson |
Q: I'm having trouble solving this trig identity, 1-(sin^2xtanx/tanx+1)-(cos^2x/1+tanx)=sinxcosx
A: Is this really suppose to be 1-(sin^2(x)tan(x)/(tan(x)+1))-(cos^2x/(1+tan(x))=sin(x)cos(x)? I think ...
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| Plane trigonometry | 5/11/2008 | Scott A Wilson |
Q: Find the acute angle of cos A = 0.55570 and tan A= 0.13476 to the nearest second?
A: Find the arccos and arctan with your calculator or use a spreadsheet. Be sure you get the answer in ...
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| Proving Trig Identities | 5/11/2008 | Sherman D. |
Q: Hey I'm Molly i have trouble with proving identities, and there was a question that i got confused ...
A: sin(x + y)/(cos(x)cos(y)) = tan(x) + tan(y) tan(x) + tan(y) = (sin(x)/cos(x)) + (sin(y)/cos(y)) = ...
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| trigonometry | 5/11/2008 | Sherman D. |
Q: Solve the following right triangles: a. a = 117 ft, b = 16.35ft and b. B = 8* 29', a = 32.8 ft ?
A: 117^2 + 16.35^2 = c^2 c = sqrt(13956.3225) or about 118.14ft using this C = 90, because its the ...
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| Trigonometry | 5/11/2008 | Paul Klarreich |
Q: A regular polygon of n sides is inscribed in a circle of radius r. If the area of the polygon is ...
A: Questioner: Patrick Category: Advanced Math Private: No Subject: TrigonometryA regular ...
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| Mathematical induction | 5/11/2008 | Paul Klarreich |
Q: I am doing Graduation.Tomorrow i have mathmatics paper. I have problem in two Question of ...
A: Questioner: Hira Mirza Category: Advanced Math Private: No Subject: Mathematical ...
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| Trigonometry | 5/10/2008 | Scott A Wilson |
Q: A regular polygon of n sides is inscribed in a circle of radius r. If the area of the polygon is ...
A: The length of the outer side of a triangle inscribed in a circle is a) r^2(1-cos(t)), where t is ...
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| Trigonometric equations | 5/10/2008 | Paul Klarreich |
Q: Find the sum of the roots tan^2x-9tan+1=0. Do I factor? If so where do I start?
A: Questioner: Patrick Category: Advanced Math Private: No Subject: TrigonometryFind the sum ...
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| Functional notation | 5/10/2008 | Paul Klarreich |
Q: Please assist me with this problem."Evaluate the functions for the values of x given as 1, 2, 4, 8, ...
A: Questioner: TC Category: Advanced Math Private: No Subject: AlgebraPlease assist me with ...
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| Trig Identity (Prove Equal to one side) | 5/10/2008 | Sherman D. |
Q: I've spent a lot of time working on this problem and i've gotten close but it never comes out right. ...
A: 3cos(x) - cot(x) = (3 - csc(x))/(sec(x)) (3 - csc(x))/(sec(x)) = (3 - csc(x))/(1/cos(x)) = (3 - ...
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| Algebra | 5/10/2008 | Scott A Wilson |
Q: How would I go about finding the exponential function ex and logarithmic function log x, graphically ...
A: I have never done this before, but there's a firts time for everything. Let me try and send an ...
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| Basic functions | 5/9/2008 | Paul Klarreich |
Q: I'm having a hard time with this question, I think I'm over thinking it. Can you please help me? The ...
A: Questioner: TC Category: Advanced Math Private: No Subject: Advanced AlgebraI'm having a ...
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| home work help | 5/9/2008 | Scott A Wilson |
Q: A girl 1.0m tall standing onthe top of a vertical 45.0m high sees a car some distace away when the ...
A: Take the girls height (since her eyes are close to the top of her head) and add to the height she is ...
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| plane trigonometry | 5/9/2008 | Paul Klarreich |
Q: GOOD DAY! I'm having trouble answering these questions ,can you check it for me...the more i try ...
A: Questioner: grace Category: Advanced Math Private: No Subject: plane trigonometryGOOD DAY! ...
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| Trig Identity (Prove equal to one side) | 5/8/2008 | Sherman D. |
Q: (sinA+cosA-sin^3A-cos^3A) = sinAcos^2A + sin^2cosA
A: sin(A) + cos(A) - sin(A)^3 - cos(A)^3 = sin(A)cos(A)^2 + cos(A)sin(A)^2 (sin(A) + cos(A)) - ...
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| Trig Identity (Proving equal on 1 side) | 5/8/2008 | Steve Holleran |
Q: (tanA + cotA)(secA - cosA) = secAtanA
A: Okay, we're working on the left side: (tan A + cot A)(sec A - cos A) = tan A sec A - tan A cos ...
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| Probability question | 5/8/2008 | Scott A Wilson |
Q: A local scratch-off lottery works like this: Out of 39 numbers, each day the lottery people ...
A: I get a 10.4% chance of having two of the numbers correct and a 11.4% chance or better of getting ...
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| Algebra | 5/8/2008 | Scott A Wilson |
Q: How would I go about finding the exponential function ex and logarithmic function log x, graphically ...
A: On e^x, note that as x gets extremely negative, e^x gets close to zero from the positive side (above ...
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| Inverses of functions. | 5/8/2008 | Paul Klarreich |
Q: How would I go about answering this question, "Give an example of an exponential function. Find this ...
A: Questioner: Iyana Category: Advanced Math Private: No Subject: Advanced Algebra Hi, ...
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| Basic trigonometry | 5/8/2008 | Paul Klarreich |
Q: can you help with this,if ive done something wrong with it pls do correct it... thanks have a nice ...
A: Questioner: grace Category: Advanced Math Private: No Subject: plane trigonometryhello ! ...
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| Inequalities - graphing | 5/8/2008 | Paul Klarreich |
Q: I need help solving the following problem: Directions: Graph the inequality. Problem: 9x is less ...
A: Questioner: Anna Category: Advanced Math Private: No Subject: 6th grade Algebra 1 honorsI ...
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| math (ratio) | 5/7/2008 | Steve Holleran |
Q: The ratio of hours in a day to days in an hour is A) 1:24 B) 24:1 C) 48:1 D) 576:1 I feel the ...
A: Okay, let's see, there are 24 hours in a day, and an hour is 1/24 of a day, so the ratio would be : ...
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| Trignometry | 5/7/2008 | Chen Min |
Q: if sinx=3cosx, what is the value of sinxcosx. Where do I start?
A: A very simple way is to get tan value of x; tanx = sinx / cosx = 3 So, sinxcosx = 0.5 sin2x = 0.5* ...
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| Trigonometric identities | 5/7/2008 | Paul Klarreich |
Q: If x=acos0-bsin0 and y=asin0+bcos0, show that x^2+y^2=a^2+b^2 (0 equals the symbol theta). Where ...
A: Questioner: Patrick Category: Advanced Math Private: No Subject: sin and cosineIf x = a ...
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| plane trigonometry | 5/7/2008 | Paul Klarreich |
Q: i dont wanna mis it again ,can you check my answer pls.if ive something wrong with this pls help me ...
A: 1. I think your diagram is : |\Man | \ | \ r | \ 550 | \ | 36\ ...
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| trig | 5/7/2008 | Steve Holleran |
Q: Verify the identity: 1/1+cost=(csct-cott)csct
A: Okay, so we've got 1 / (1 + cos t) = (csc t - cot t) * csc t I would work ...
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| Trig | 5/7/2008 | Steve Holleran |
Q: For f(x) = 2 sin(2x+Pi/4) The amplitude= ? The period=? the phase shift-?
A: Okay, we've got f(x) = 2 sin(2x + pi/4) The amplitude is the absolute value of the multiplier in ...
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| system of equations | 5/7/2008 | Scott A Wilson |
Q: could you help me figure this system of equations out by solving for the variables b1, d1, a2, b2, ...
A: Put this in matrix format first with the variables in the order a1, b1, c1, d1, a2, b2, c2, d2. ...
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| plane trigonometry | 5/6/2008 | Paul Klarreich |
Q: i dont wanna mis it again ,can you check my answer pls.if ive something wrong with this pls help me ...
A: Questioner: arthur Category: Advanced Math Private: No Subject: plane trigonometryi dont ...
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| verify identity | 5/6/2008 | Scott A Wilson |
Q: I cant seem to get these 3 identities step by step. I need some help please. 1. tan^2t ------ = ...
A: To find the answer to these problems, I convert everything to sin(t) and cos(t). 1. I can solve ...
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| plane trigonometry | 5/6/2008 | Paul Klarreich |
Q: 10please help me again please please please thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!! use the method in ...
A: Questioner: grace Category: Advanced Math Private: No Subject: plane trigonometryplease ...
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| Complex Numbers | 5/6/2008 | Steve Holleran |
Q: I've just been doing this complex numbers booklet and this question (attached) has stumped me. ...
A: Well, I think I have something put together here. Let's take a look: Since z = a + bi, then z + i ...
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| statistics | 5/6/2008 | Scott A Wilson |
Q: A sample of 500 graduates was selected to determine their performance for government and private ...
A: Find the percentage of males and the percentage of females that are going to have government jobs. ...
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| Algebra Problem Require Help | 5/6/2008 | Steve Holleran |
Q: Weights of 2, 3, 5, and 7 pounds are not labeled. Using a balance scale. How many weighting do you ...
A: I would think you would need 4 weighings. Pick two, weigh them , keep the heavier and set the ...
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| combinations | 5/5/2008 | Steve Holleran |
Q: The expert can't answer your question. Your Question was: We have 7 white balls and 6 red balls. ...
A: Magnus, Thanks for your follow-up. I think, however, there are some inaccuracies here. The ...
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| application of quadratic equations | 5/5/2008 | Chen Min |
Q: 1. Some students planned for a get-together. The budget for food was $5... Five of the students ...
A: 1.Assume there were x students to come in the plan, the total food price = 5x the actual number ...
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| sampling statistics | 5/5/2008 | Scott A Wilson |
Q: First of all, thanks so much for the help. I'm baffled as to how to even start this one! In the ...
A: We both agree that the factor is 100X larger. If 50 dips of the big net are required on average, ...
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| sampling statistics | 5/5/2008 | Scott A Wilson |
Q: First of all, thanks so much for the help. I'm baffled as to how to even start this one! In the ...
A: You're welcome, Craig! What's important about a net is the area with which it is being dragged ...
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| quadratic equations | 5/5/2008 | Scott A Wilson |
Q: A designer, attempting to arrange the characters of his artwork in the form of a square grid with ...
A: It is know that the difference between x^2 and (x+1)^2 is 2x+1. It is also known that the ...
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| Calculus & Vectors | 5/4/2008 | Steve Holleran |
Q: Find all maximum and minimum points for y=2sinx+sin^2x
A: Okay, so we have y = 2 sin x + sin^2 x So the derivative is y' = 2 cos x + 2 (sin x )(cos x) =0 ...
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