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April 21, 2014

Search: Math - Solving Trig Equations

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Math - Solving Trig Equations
thanks, I solved it :)
Wednesday, November 21, 2007 at 6:29pm by Anonymous

Math - Solving Trig Equations
Glad to be of service. :)
Wednesday, November 21, 2007 at 6:29pm by Michael

Math - Solving Trig Equations
Reiny, I was anonymous... my name wasn't filled in. ;)
Wednesday, November 21, 2007 at 8:23pm by Michael

Math - Solving Trig Equations
Yeah it should be, sorry for the typo
Saturday, November 24, 2007 at 4:48pm by Anonymous

Math - Solving Trig Equations
Start by recalling the most important identity. My math teacher calls this "the #1 Identity." sin^2(x) + cos^2(x) = 1 We want to simplify our trig equation by writing everything in terms of sine. Let's solve the #1 Identity for cos^2(x) because we have that in our trig ...
Wednesday, November 21, 2007 at 6:29pm by Michael

trig
solving radical equations... help! 5+n+1= n+4
Wednesday, December 8, 2010 at 6:35pm by bob

algebra attn Reiny
Thanks for your help with the solving of the three equations! Yes, it was a typo. I just finished solving it a long way, solving for the 1st 2 equations then the 2nd and 3rd and plugging in variables...etc. etc. Your way gave the same answer, but quicker, does your way always ...
Tuesday, February 24, 2009 at 10:34pm by Terri

Math - Solving Trig Equations
Should this be... sin^2x - 1 = cos^2x ?? Your equation has two equal signs.
Saturday, November 24, 2007 at 4:48pm by Michael

Math - Solving for Trig Equations
Make sure you copied the question correctly. The way it stands cos x = 3/2 has indeed no solution (the sine and cosine function does not exceed a value >1 or < -1
Thursday, November 22, 2007 at 9:01pm by Reiny

MATH
I've been having problems with solving equations that involve fractions with the following problem can I get some help for solving equations that involve fractions? x+1=2/3x Thanks for the help.
Saturday, March 14, 2009 at 4:02am by Jen

Math - Solving for Trig Equations
On the fourth/fifth line, you erred. When you add 2 to both sides, the right side is positive, not negative. cos^2 x=1 cos x= +- 1 giving 1, 180,360
Thursday, November 22, 2007 at 5:35pm by bobpursley

Math - Solving Trig Equations
3sinx = 2cos^2(x) I believe you've treated this as cos(2x) and expanded it as a double-angle identity. However, you can't do this because the cosine function is being squared. The 2 is not being multiplied by the x. I'm working on it...
Wednesday, November 21, 2007 at 6:29pm by Michael

Trigonometry
I cannot give a general answer to your question without seeing the actual problem In solving trig equations, you have to consider that each trig ratio is positive in 2 different quadrants and is negative in 2 different quadrants Usually answers are neede for the domain between...
Wednesday, June 9, 2010 at 5:11pm by Reiny

Math - Solving Trig Equations
The only identity you need it the #1 Identity. Plugging in 1 - sin^2(x) for cos^2(x), you should get... 3sinx = 2(1 - sin^2(x)) Use the distributive property, collect everything on the left, and then factor.
Wednesday, November 21, 2007 at 6:29pm by Michael

Math - Solving Trig Equations
The only identity you need is the #1 Identity. Plugging in 1 - sin^2(x) for cos^2(x), you should get... 3sinx = 2(1 - sin^2(x)) Use the distributive property, collect everything on the left, and then factor.
Wednesday, November 21, 2007 at 6:29pm by Michael

Math - Solving Trig Equations
wouldn't it be easier to solve for 2x then divide it by two? sin2x=2cos2x sin2x/cos2x=2 tan 2x=2 2x=63.43 deg x= .... you do it.
Saturday, November 24, 2007 at 7:07pm by bobpursley

Chemistry
When solving Hess law problems,do we need to use all the equations given to get the Htotal or just choose the relevant equations that are related to the final equation required? Let's say there r 5 equations given,but the relevant equations are 3 only ,so we can neglect the ...
Friday, March 23, 2012 at 2:22am by Meenaakshi

Math - Solving for Trig Equations
For the following equation, why cannot I not solve it? I keep getting an error. -- 2cosx - 3 = 0 -- I first isolated for "x" 2cosx-3 = 0 (2cosx/2) = (3/2) x = cos^-1(3/2) x = error? why? -- My textbook answer: 30 and 330 degrees --
Thursday, November 22, 2007 at 9:01pm by Anonymous

Math - Solving Trig Equations
wow I forgot about that identity, thank you! But, I'm still stuck... I get cos^2x + sin^2x = 1 I can't use any compound identities for this...I don't know how to isolate for either cos or sin...
Wednesday, November 21, 2007 at 6:29pm by Anonymous

Math
When you are "solving a system", you are actually solving more than one equation in an equal number of unknown variables, such as two equations in two unknpwns.
Saturday, September 15, 2007 at 6:38pm by drwls

Math
I am confused by your mention of "sets". I think A and B as the equations for straight lines. If 3x -4 = 2x +5, then x = 9 That somes from setting the two equations equal to each other and solving for x
Monday, December 28, 2009 at 8:42am by drwls

Business Algebra
Produce an example of a system of equations to your fellow students and allow them to respond on which method (graphing, substitution, elimination, matrices) they would choose for solving your systems of equations. Be sure to reply to students' responses on their preferred ...
Wednesday, June 10, 2009 at 10:18pm by Redbone

Trigonometic
Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) What is the question? Solve for x? x= arcsin (4/5) put that in your calculator. Same for the next. For both cases I recognize the sides of well-...
Monday, April 23, 2007 at 5:52am by abdo

solving equations fractions
how do i go about solving equations fractions?
Tuesday, September 7, 2010 at 7:59pm by danique

math
Study these sites. http://www.mathsisfun.com/definitions/two-step-equation.html https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/v/two-step-equations http://www.basic-mathematics.com/solving-two-step-equations.html
Wednesday, September 18, 2013 at 7:49pm by Ms. Sue

Math
Please help me about solving kuadratic equations: X^2-2(1-3m)x+7(3+2m)=0 Find m parametter that equations to have the same solves x1=x2,so Discriminant D=b^2-4ac D=0. Please Help me.
Thursday, February 3, 2011 at 12:49pm by Defrim

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
Saturday, December 17, 2011 at 7:43pm by Don

Math - Solving Trig Equations
Hmm... that's tricky. I solved it one way (similar to your method), and it didn't work. Anyway, this works... (1) Subtract the cos^2(x) from both sides. (2) Substitute "1 - sin^2(x)" in for cos^2(x). That comes from the #1 Identity: sin^2(x) + cos^2(x) = 1. (3) Simplify and ...
Saturday, November 24, 2007 at 4:48pm by Michael

Pre-Algebra
https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/v/solving-equations-1 http://www.youtube.com/watch?v=juG-iIuTJQE
Thursday, July 11, 2013 at 2:11pm by Ms. Sue

math
http://www.sosmath.com/algebra/solve/solve0/solve0.html http://www.mathsisfun.com/algebra/equations-solving.html http://www.purplemath.com/modules/solvelin.htm https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/equations_beginner/v/solving-...
Saturday, May 18, 2013 at 1:30pm by Ms. Sue

Math
Solving a system of equations means finding the intersection of the two lines. Your 2 equations represent two parallel lines, they cannot intersect, therefore you cannot have a solution.
Wednesday, November 12, 2008 at 12:02pm by Reiny

Math
In google type: Solver Solving a System of Linear Equations by Elimination When you see list of results click on: Solver Solving a System of Linear Equations by Elimination/Addition When page be open in rectacangles type your coefficients 1 row 2 10 58 2 row -14 8 140 and ...
Wednesday, March 23, 2011 at 4:05pm by Bosnian

math
In google type: Solver Solving a System of Linear Equations by Elimination When you see list of results click on: Solver Solving a System of Linear Equations by Elimination/Addition When page be open in rectacangles type your coefficients 1 row 5 3 2 2 row 6 4 7 and click ...
Sunday, April 3, 2011 at 5:34pm by Bosnian

Algebra
Explain the difference between solving a linear equation graphically and solving a system of equations graphically. How would I go about doing this?
Wednesday, February 18, 2009 at 3:52pm by Suzanne

math
1) Why should we clear fractions when solving linear equations and inequalities? Demonstrate how this is done with an example. Why should we clear decimals when solving linear equations and inequalities? Demonstrate how this is done with an example.
Wednesday, March 21, 2012 at 10:37am by jess

trig
Solving Trig Functions: How Do You Solve For Sin 7.5 Using Half-Angle and Double-Angle Identities?
Wednesday, September 22, 2010 at 10:23pm by Spy[c]

Solving Equations with variable on Both Sides
I need help solving this. I've never been really good with fractions, so, thats probably why.: 3p/8 + 7p/16 - 3/4 = 1/4 + p/16 + 1/2
Saturday, May 3, 2008 at 8:36pm by Mitch

Math: Solving Trig Equation
9tan (x) - 9 sec^2 (x)/ tan (x)
Sunday, March 31, 2013 at 1:16am by Kristi

MATH
Solving system of equations by graphiing x-y=-1 x+y=5
Friday, November 11, 2011 at 4:55pm by Anonymous

math
a-2/6 -5 = a+3/3 SOLVE FOR A solving equations with fractions
Thursday, July 12, 2012 at 5:18pm by jack

math
any helpful hints for solving equations?
Saturday, May 18, 2013 at 1:30pm by stacy

math
What is the hardest part of solving equations?
Saturday, May 18, 2013 at 1:55pm by stacy

Math/ Algebra
Post your responses to the following. Answer each question in a separate paragraph: Techniques that can simplify solving equations and inequalities are to clear fractions and decimals when solving linear equations and inequalities. 1. Demonstrate how fractions are cleared with...
Monday, June 14, 2010 at 5:26pm by Amanda

Math
Please post such problems separately and show your work. If you are unfamiliar with the elimination and substitution methods for solving simultaneous equations, referenc material can be provided. Your first question has no solution because the two equations are incompatible. ...
Monday, July 14, 2008 at 8:09pm by drwls

math
i need help on solving equations with hole numbers
Monday, January 14, 2008 at 5:36pm by jessica

math
solving quadratic equations 8s^3=72s
Sunday, May 3, 2009 at 9:02pm by Bryan

maths
What equations? I searched Google under the key words "solving equations" to get these possible sources: http://www.google.com/search?client=safari&rls=en&q=solving+equations&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use ...
Sunday, August 21, 2011 at 10:31am by PsyDAG

math
Look for the variable that has the "easiest" coefficients. take any two equations, by multiplying by suitable constants, get the coefficients of one variable to be the same, then subtract the two equations. take any other pair and by targeting the SAME VARIABLE, multiply by a ...
Monday, October 20, 2008 at 9:58pm by Reiny

Trig
How do you convert rectangular equations into polar equations? If x4−y4=xy , then r2=atan(b); What is a? What is b?
Monday, December 13, 2010 at 11:47pm by Audrey

Math
Why is it necessary to perform a check when solving rational equations?
Thursday, August 5, 2010 at 7:08pm by Jayde

math riddle
But hey tip..you should try solving the problems in order to get the answers so that you can solve the riddle. IF you go to shcool with just the riddle solved, you will not get full or perhaps any credit for your work, so better off trying to get help for the actual equations ...
Monday, January 5, 2009 at 10:16pm by MAtt

algebra
Explain the difference between solving a system of equations by the algebraic method and the graphical method. Someone also wants to know why there are different methods for solving the same problem-what would you tell him? Tiffany Oakes
Monday, July 12, 2010 at 10:46pm by kiMBERLY

Math - Solving Trig Equations
Solve each equation for 0 is less than and equal to "x" is less than and equal to 360 3sinx = 2cos^{2}x ----- I don't know how to solve this equation...this is what I have, but I don't know if I'm on the right track or not 3sinx = 1 - 2sin^{2}x 3sinx - 1 + 2sin^{2}x = 0 2sin^{...
Wednesday, November 21, 2007 at 6:29pm by Anonymous

Math - Solving Trig Equations
Solve each equation for o is less than and/or equal to theta is less than and/or equal to 360 -- sin^2x = 1 = cos^2x -- Work: cos^2x - cos^2x = 0 0 = 0 -- Textbook Answers: 90 and 270 -- Btw, how would you isolate for cos^2x = 0? Would it be... x = cos^-1 square root of _____ ?
Saturday, November 24, 2007 at 4:48pm by Anonymous

Math
Sustem of equations. I have to solve the system of equations by graphing and solving. Ther are thirty-three students in the Chess Club. There are five more boys than girls in the club. Write and solve a system of equations to find the number of boys and girls in the chess club.
Tuesday, January 29, 2013 at 9:13pm by Alexis

Rather Urgent math~!
Oh and we are doing "Solving Multi-Step Equations" in this lesson
Wednesday, September 25, 2013 at 2:23pm by Gabby

Math help
I need help on these problems. There over solving equations by factoring. 1.4x^2=8
Wednesday, March 5, 2014 at 12:49pm by Anonymous

physics
Problem solving is not memorizing equations. It is using equations to find certain elements, then relating those elements to the situation. This is what is required, and there is no substitute.
Tuesday, September 7, 2010 at 10:48pm by bobpursley

trig
Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
Sunday, December 11, 2011 at 4:49pm by Josh

math
Solving "Linear Equations" usually involves one or more chapters in an introductory Algebra course. Carefully review those chapters from your text. If you don't have a text, google "linear equations", I got about 7 million hits for that topic
Monday, February 14, 2011 at 8:36am by Reiny

Math
Let f(x)=ax^2+bx+c from (-1,0), we conclude that f(-1)=0, or a(-1)^2 + b(-1) + c = 0......(1) Similarly, from (0,2), we have a(0)^2 + b(0) + c = 2........(2) and from (2,0), we get a(2)^2 + b(2) + c = 0........(3) By solving the system of linear equations (1),(2) and (3), you ...
Tuesday, May 4, 2010 at 8:56pm by MathMate

solving equations
Hmmm. How can we know what DQ2 in Week 3 of Math 116 is? Can you ask a specific question?
Friday, August 14, 2009 at 9:40am by bobpursley

math
I'm doing solving quadratic equations.I need help with couple of problems. k(k+5)=0,4r^2=100
Wednesday, April 7, 2010 at 9:30pm by lauren

Math C30
Solving Equations Containing Circular Functions ... Solve 2cos^2=1
Wednesday, November 2, 2011 at 1:05am by don

Algebra
Solving Linear Equations - Elimination Write whether each of these systems of equations has a common solution or not. Explain y = -x + 2 Y = 2x + 1 If you show me one and explain it, then I can probably do the rest...Thanks
Thursday, December 18, 2008 at 9:35pm by Jessie

math
im solving nonlinear equations they are y = x^2 y - 2 = x so i plugged in the x^2 to get x^2 - x = 2 then i factored out an x to get x(x-1) = 2 now what would i do?
Sunday, October 4, 2009 at 6:50pm by lyne

Math C30
Solving Equations Containing Circular Functions : Solve 2cos sq x =1
Tuesday, November 1, 2011 at 10:00pm by don

math
However, the solution pops to mind without solving any equations: 1+4+6 = 11 1*4*6 = 24
Monday, November 7, 2011 at 9:55pm by Steve

Math- Urgent
Solving Equations -7+b/15=-6 What does b equal? Please show all work.
Monday, August 12, 2013 at 8:49pm by j

Math- Urgent
Solving Equations 3=r/16+4 What does r equal? Please show all work.
Monday, August 12, 2013 at 8:59pm by j

math
Well, the general approach to solving equations of this kind is by using something known as a determinant. The determinant of this equation is found by the following formula: D=b-4ac (this formula is found by using Horners theorems on second degree equations, but I won't be ...
Thursday, February 14, 2008 at 8:28pm by Christiaan

MATH
Solving by graphing DQ 1 Solving by substitution Solving by elimination Which method do you think would be best to solve this system? y=10x-8 y=1/2x+5
Tuesday, October 19, 2010 at 11:36pm by Anonymous

math - 8
Please help me with solving equations with rational numbers. i have struggled in math all my life. I desperately need help with my homework. Thank you
Monday, October 8, 2007 at 7:39pm by Tara

Math
Can someone please explain to me exactly what type of math this is (e.g. radicals, linear equations) and how I would go about solving this?
Sunday, February 23, 2014 at 1:47am by Anonymous

Math - Solving Trig Equations
What am I doing wrong? Equation: sin2x = 2cos2x Answers: 90 and 270 .... My Work: 2sin(x)cos(x) = 2cos(2x) sin(x) cos(x) = cos(2x) sin(x) cos(x) = 2cos^2(x) - 1 cos(x) (+/-)\sqrt{1 - cos^2(x)} = 2cos^2(x) - 1 cos^2(x)(1 - cos^2(x)) = 4cos^4(x) - 4cos^2(x) + 1 5cos^4(x) - 5cos^...
Saturday, November 24, 2007 at 7:07pm by Anonymous

math (trig)
Im having problems solving this equation: 2sin(x) = cos(x) + 2 I keep getting an imaginary number..:/
Tuesday, December 18, 2007 at 8:02pm by jess

Algebra
I am solving for sytems of equations using the elimination method. Book says answers are 0,-1. I have tried solving for both x & y using both the 5 and 25 . I am not getting the 0,1 as my answer. 5x-5y=5 25x-25y=22
Tuesday, April 1, 2008 at 12:00pm by G

Math
I am having probles with solving systems of equations by graphing please help!! y=4+2/3x 2x=3y
Wednesday, May 13, 2009 at 6:50pm by Gaby

math
help with solving the system of equations 3x+4y+z=7 2y+z=3 -5x+3y+8z=-31
Monday, March 22, 2010 at 3:56am by Paula

Math
Solving systems of equations with three variables? What is the solution to the system? 1] x+y+z=-3 2] 3y-z=4 3] 2x-y-2z=-5
Monday, May 30, 2011 at 7:02pm by Kori

algebra 1
Got a test tomorrow... Say you have a system of equations (linear), that you can solve using substitution, graphing, or elimination. Without solving the equations, can you tell if there is one solution, many solutions, or no solution?
Wednesday, February 27, 2008 at 4:54pm by Lily

solving polynomial equations
You need to show where parentheses go in that last equation. Even though they may not be in your printed assignment, you need them here when typing equations on a single line, without spaces. Do you mean -4 = (c-3)/6 - (1-c)/8 + c/12 ?
Saturday, March 27, 2010 at 9:15pm by drwls

Trig
What specific topics do you need help with? Trig identities are simply equivalent expressions...you should know the identities, and know how to substitute them into equations...everything else pretty much follows from that.
Wednesday, January 6, 2010 at 6:54pm by Marth

Maths
just solved the system of equations. I used wolframalpha.com, but you can use elimination, determinants, substitution, or whatever you like to use for solving systems of equations. Algebra I stuff. Dust off those skills.
Tuesday, February 26, 2013 at 10:38am by Steve

Math
When solving exponential equations using logarithms. How would you sold one that has a fraction as the exponent such as: x^(1/4)-81=0
Thursday, November 19, 2009 at 9:23pm by Preston

Math (Grade 9)
Solving Linear Equations: x _ - 3 = 5 7 I know you have to add three to each side, but after that im not sure what to do,, please help!
Monday, June 13, 2011 at 9:02pm by Maddison

Math C30
Last Question disregard .. ooops Solving Equations Containing Circular Functions .. Solve 2cos^2x=1
Wednesday, November 2, 2011 at 1:07am by don

Trig
Help with solving radical fractions.
Tuesday, September 15, 2009 at 8:05pm by Anonymous

math
Hi, How could I find the line of best fit? I plotted each of the equations I had for a problem I'm solving. The equations were linear (y=ax+b) and quadratic (y=ax+b+c). I'm supposed to find out which line is the most appropriate for the data that is given to me. When looking ...
Monday, March 17, 2008 at 4:40pm by Irene

Math-Help
Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your answers to Part A and B ...
Monday, April 1, 2013 at 10:23am by Jayson Angole

math
Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your answers to Part A and B ...
Tuesday, April 2, 2013 at 5:31pm by Jayson Angole

solving Equations
6/5
Tuesday, October 17, 2006 at 9:59pm by Isis Tarrats

Math
thanks. How would you know how to do similar problems? Where should i start when verifying trig equations?
Wednesday, January 12, 2011 at 11:04pm by Haley

math 20 system of equations
I have been solving system of equations graphically and using addition and subtraction and now I'm being asked: Give any linear system of two equation that has a solution of (3,5). Does it have to be in y=mx+b form and if so how do I do it? I've been trying to find an example ...
Tuesday, October 12, 2010 at 10:43pm by Sandi

solving equations
I need help understanding the concept of the value of an inequality DQ 2 in week 3 of math 116. any suggestions would be great!
Friday, August 14, 2009 at 9:40am by cassie11

Math
Solving First degree equations. 0.2x-0.3=0.1x+5 I am having a hard time entering this into my TI-84
Wednesday, January 26, 2011 at 11:08pm by Lisa

Math help
I need help on these problems. There over solving equations by factoring. Don't get it at all. 1. (Y+5)(Y-7)=0 2. 2n(n-20)=0 3. (2t-3)(3t-2)=0 4. (2u+7)(3u-1)=0
Tuesday, March 4, 2014 at 8:56pm by Anonymous

Math help
I need help on these problems. There over solving equations by factoring. 1. 4x^2=9 2. M^2-36=16M 3. R^2+9=10r 4. 6s^2=17s-12
Wednesday, March 5, 2014 at 11:39am by Anonymous

Solving system of linear equations
Thanks alot! This is going to help me solve these system of linear equations so much faster.
Sunday, February 22, 2009 at 5:55pm by Chopsticks

Algebra
Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right? how would you combine those two equations?
Saturday, November 13, 2010 at 8:06pm by Max

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