Saturday
April 30, 2016

# Search: Math - Solving Trig Equations

Number of results: 125,675

trig
solving radical equations... help! 5+¡în+1= n+4
December 8, 2010 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 ...
February 24, 2009 by Terri

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.
March 14, 2009 by Jen

Algebra
Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x - 3y + 5z =3 (2) 3x - 2y + 5z=1 (3) my teacher gave me the answer she said the solution set for this should be...
April 25, 2016 by Clyde

Algebra I DONT KNOW HOW TO DO 3 VARIABLES
Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x - 3y + 5z =3 (2) 3x - 2y + 5z=1 (3) my teacher gave me the answer she said the solution set for this should be...
April 25, 2016 by Clyde

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 --
November 22, 2007 by Anonymous

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 ...
March 23, 2012 by Meenaakshi

Math (Solving Equations)
Find all solutions (answers should be given in simplified form). Some answers may involve the number i. *I will use lowercase l to represent absolute value lines.* 3 lx-1l + 4 = 19 We've never really worked with absolute value in solving equations before. Do I distribute the 3...
May 17, 2015 by Leah

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-...
April 23, 2007 by abdo

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 by Don

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 ...
June 10, 2009 by Redbone

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
May 3, 2008 by Mitch

Math
February 3, 2011 by Defrim

Algebra SOLVING LINEAR EQUATIONS AND INEQUALITIES
Please help Im am Grade 5 and my teacher is letting me do this. 1. Solve the solution by using elimination and substitution 3/x - 2/y = 14 6/x + 3/y = 7 2. Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) ...
April 25, 2016 by Clyde

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 _____ ?
November 24, 2007 by Anonymous

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

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

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

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

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

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.
March 21, 2012 by jess

math
May 3, 2009 by Bryan

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

math
any helpful hints for solving equations?
May 18, 2013 by stacy

math
What is the hardest part of solving equations?
May 18, 2013 by stacy

Math 8R - help!!!!!!!!!!!!!
Multi-Step Equations Solving Equations with Variables on Both Sides 1) 5y + 4 = 4y + 5 11a + 9 = 4a + 30 2w + 3 = 4w - 5 2) 3a - 10 = 4 + a 2x - 1 = x - 3 6n + 4 = n - 11 3) 29r + 4 = 28 + 13r 7x - 11 = -19 + 3x 4) b + 3 = 2b - 7 I'm having a bit trouble and really confused ...
October 17, 2012 by Laruen

solving equations fractions
how do i go about solving equations fractions?
September 7, 2010 by danique

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...
June 14, 2010 by Amanda

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
December 11, 2011 by Josh

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^{...
November 21, 2007 by Anonymous

Math - Solving for Trig Equations
Solve the following equation for 0 less than and/or equal to "x" less than and/or equal to 360 -- cos^2x - 1 = sin^2x -- Attempt: cos^2x - 1 - sin^2x = 0 cos^2x - 1 - (1 - cos^2x) = 0 cos^2x - 1 - 1 + cos^2x = 0 2cos^2x - 2 = 0 (2cos^2x/2)= (-2/2) cos^2x = -1 cosx = square ...
November 22, 2007 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^...
November 24, 2007 by Anonymous

Math
Why is it necessary to perform a check when solving rational equations?
August 5, 2010 by Jayde

Math
Solving quadratic equations by graphing? 3. x2-4x + 6 = 0 4. x2-4x-1=0 5. 4x2-12x + 3 = 0 6. x2-2x-4=0
February 27, 2011 by Erin

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

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
July 12, 2010 by kiMBERLY

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

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.
January 29, 2013 by Alexis

math
Anthony has 7 bills. All the bills are tens or twenties. The bills Anthony has total \$100 in value. How many of each hill does Anthony have? Pretty sure the solving method is solving systems of equations but you have to isolate the variables and stuff.. please help!!
April 19, 2016 by claire

Math
May 13, 2009 by Gaby

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

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
May 30, 2011 by Kori

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
March 4, 2014 by Anonymous

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?
November 13, 2010 by Max

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
December 18, 2008 by Jessie

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
April 1, 2008 by G

math
what is.7 of 39.4????? 39.4*.7=27.58 Having trouble solving equations with two variables..both unknown
March 20, 2007 by Caitlyn

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?
October 4, 2009 by lyne

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

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

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

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

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
October 19, 2010 by Anonymous

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 ...
April 1, 2013 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 ...
April 2, 2013 by Jayson Angole

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?
February 23, 2014 by Anonymous

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

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
March 5, 2014 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 ...
March 17, 2008 by Irene

Trig
September 15, 2009 by Anonymous

Algebra
40 =15 x x - 20 This is a three part question>> first find the lcd method of solving this equations, and the second ones about cross-multiplying method to solve this equations ,The next question asked would the cross- multiplying method work for all rational equations?? ...
December 4, 2011 by JERSEYGIRL

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?
February 27, 2008 by Lily

math (final trig problem)
Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig questions?? how about ...
April 30, 2007 by jacob

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
November 19, 2009 by Preston

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!

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

Math
So I'm doing solving system of equations, 2x+y=5 4x+2y=10 I found no solution that would fit it therefore they are parallel to each other. Am I correct?
April 18, 2016 by Steven

Differential Equations!
I'm struggling solving this separable differential equations: (du/dv) = ((uv+u)/(uv+v)) I multiplied both sides by dv to get on the left side just du and cancel out dv, but after that don't know where to go. I've tried integration by parts but it doesn't look right! Any help ...
January 13, 2013 by Massiel

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!
August 14, 2009 by cassie11

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 ...
October 12, 2010 by Sandi

quick question regarding equations
I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to express it in fractions, I...
August 14, 2007 by Shawn

algebra
solving equations -x^2, if x=-1, etc
October 14, 2010 by mike

solving rational equations
4-a-5/a+5=a^2-15/a+5
July 9, 2011 by karen

solving equations by sibstitution
-2x+6y=6 -7x+8y=-5
January 5, 2013 by Anonymous

Solving Rational Equations
4x/x-5=8/5-x
February 27, 2013 by austin

Math
Solving quadratic equations by completing the square. Could you show me every step how to do it. That way I'll know probably know how to do the other ones. With that method you use. 1/2x^2 + x -13 = 0
October 30, 2009 by Basil

Economic Math
Suppose the supply and demand for milk is described by the following equations: Qd=600-100P, Qs = -150+150P, where P is price in dollars . Qd is quantity demanded in millions of gallons per year. A. Create supply and demand tables corresponding to these equations. B. Graph ...
May 8, 2015 by Abraham

solving polynomial equations
March 27, 2010 by dan

Physics
You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 15.0. Find the x and y components to vector C. Here's the step by step from the book that I'm having a...
August 30, 2014 by Vectors

math
Solving Equations with Fractions 1/2 x - 1/3 x = 7/3 solve for X i need help step by step process anyone?
July 12, 2012 by nain

Math
Is there a difference between solving a system of equations by the algebraic method and the graphical method? Why or why not?
March 10, 2010 by Craig

Math
Can u please guide me on solving these two equations please. Thank You 3.6-7.6 (-8.3)-11.4
August 27, 2009 by Liz

calculus
solve (12/t)+t-8=0 (solving rational equations)
November 4, 2010 by carli

algebra
January 19, 2011 by Amy

Math Question
Hi, I need help with a math question. Thank you to whoever helps me! :) When solving a system of 2 equations and 2 unknowns using the substitution method, what is the ideal value of the coefficient of the isolated variable?
January 7, 2014 by Sara

math,correction
Graph each of the following equations by first solving for y. 2x – 3y = 12 so it would be: y = 2/3x – 4 and the solutions points would be: So (-3,-6) is a solution
January 14, 2007 by jasmine20

math
How do you use RECIPROCALS to solve equations without variables. I do not want the answer to the equation. I want the steps to solving it with RECIPROCALS. Thanks! ex. 37.6 + 2.5 ----------- 48(7.8 - 10.5)
February 23, 2009 by Lallie

Trig
Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
May 11, 2011 by Rachal

equations of tangents and normals
hi, i'd really appreciate some help solving this question! I am completely at loss here :/ The question is to: Find the equation of the normal to y=loge(x+2) which is parallel to the line with equation y+3x-5=0 I am fine at solving these sorts of equations when they give me ...
May 20, 2007 by elle

trig
1st-the reason i keep change my name because some of my friends are using my computer by their own name to asked questions. we are having a hard time solving each trig problems 2nd- if sin theta=0.6 and 90 degree <theta < 180 degree, find the exact value of sin 2 theta. ...
May 8, 2011 by minh

Solving Trig Equations
Solve for x in the interval [-pi,0] a) sin^2x = 3/4 I know that you have +root3/2 and -root3/2 and the positive one gives you an error when doing the inverse of sin, but im confused about the -root3/2. I found that one of the answers of x is -pi/3 (-60 degrees) which fits my ...
November 27, 2015 by Mandy

Math
Solving Equations with Grouping Symbols: 3(g-3)=6 Please explain how to do this Rules: Use Distributive Property Combine like terms Solve by using inverse operations
January 18, 2012 by Cassie

algebra equations
i need help solving the following: 10h = 8h + 6 and 6x + 2 = 3x - 1
October 21, 2008 by Natalie

solving systems of equations with 3 variables
What is the solution to the system? x-2y=1 x-3y+z=0 2x-2z=18
May 30, 2011 by Kori

algebra
Solve the equations symbolically. 3x+7/4 + 3x-7/5 =-8/5 6(7x-1)+5=24+3x How do I go about solving them?
January 31, 2013 by Anonymous

Algebra
I need some help solving this system of equations: 5x - y = 18 –4x – 2y = –6
July 20, 2014 by Math

math:(
how do you compare the symbolic method for solving linear equations to the method of using a table? PLEASE HELP MY BUS COMES IN 30 MINUTES!!!
April 6, 2012 by malisa

Trig Proofs!
I'm having trouble solving this proof. Can you help? cos^3+sin^3/cosx+sinx = 1-sinxcosx Thanks!:)
March 8, 2012 by Kels.

Math
Can someone please help/show me how to Graph linear equations?? Directions~ Graph the following linear equations by plugging in values for x, solving for y, and keeping track of your x- and y-values in a table. You should determine at least three points on the line before you ...
October 20, 2015 by Abby

Algebra
I am solving sytems of equations algrbraically. I have tried several times and I am not comming up with he answers for the following three equations that the book gives. 1) 4x-2y=-5 -x+2y=2 Answer in book: -1,1/2 2) -5x+2y=10 5x-3y=-10 Answer in book: -2,0 3) 2x-y=2 -2y+4y=-5 ...
March 27, 2008 by G

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