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April 20, 2014

Search: Trig - Identies/equation, please help!

Number of results: 121,342

Trig - Identies/equation, please help!
I get this now!!, Thanks!!!, i guess i should study now.
Wednesday, November 12, 2008 at 11:05pm by James

Trig - Identies/equation, please help!
the ΘЄ[0, 360) was suppose to mean its 0 < or = Θ < 360
Wednesday, November 12, 2008 at 11:05pm by James

Trig - Identies/equation, please help!
whtis the value of 343... figure tht out .. and thn u can say tht other solutions with be 2 pie ( n) n wht ever value u figure out in radioans..
Wednesday, November 12, 2008 at 11:05pm by Sarah

trig identies 5.3 &5.4
i got it nevermind
Tuesday, April 26, 2011 at 9:31pm by amber

trig identies 5.3 &5.4
cos pie/12
Tuesday, April 26, 2011 at 9:31pm by alex

Trig - Identies/equation, please help!
That looks like an equation, not an identity. If it were an identity, it would be true for all theta. I am confused about what your symbol on the right side, 1 ΘЄ[0, 360) is supposed to mean Are you solving 2 Sin(Θ+47)= 1 ? If so, Sin(Θ+47)=0.5 Θ+...
Wednesday, November 12, 2008 at 11:05pm by drwls

trig identies 5.3 &5.4
use a sum or difference identity to find an exact value pie/12
Tuesday, April 26, 2011 at 9:31pm by alex

trig - identies
Assume that A and B are in standard position and that sin A = 1/2, cos A >0, tan B = 3/4, and sinB<0 Cos (A-B)
Wednesday, November 12, 2008 at 7:57pm by Anonymous

Math >> limits
If you do not understand derivatives, then you will have to find the trig equivalent of the multiangle (identies)equivalents, and reduce the fractions.
Wednesday, September 5, 2007 at 6:57am by bobpursley

Trig - Identies/equation, please help!
2Sin(Θ+47)=1 ΘЄ[0, 360) What I did: Sin(Θ+47)=1/2 Sin 1/2 = Θ+47 30+360 = Θ+47 343 = Θ Ok, so how do i find the other solutions? In this problem its 103. I think we were suppose to do something with the graphing calculator and ...
Wednesday, November 12, 2008 at 11:05pm by James

trig identies 5.3 &5.4
Hmmm. 15 degrees. I know 45, and 30, so why not the difference? Cos15=cos(45-30) = you know the formula
Tuesday, April 26, 2011 at 9:31pm by bobpursley

Physics
F=qv x B in vectors so sinTheta=F/qvB and remember your trig identies: sinTheta= sin(180-Theta) as I recall... For instance, Sin 87= sin 93
Thursday, September 27, 2007 at 9:01pm by bobpursley

trig - identies
from sin A = 1/2, cos A >0, we know that A has to be in quadrant I, so cosA = √3/2 from tan B = 3/4, and sinB<0, we know that B must be in quadrante III, so sinB=-3/5 and cosB = -4/5 Cos(A-B) = cosAcosB + sinAsinB = √3/2(-4/5) + 1/2(-3/5) = (-4√3 - 3)/10
Wednesday, November 12, 2008 at 7:57pm by Reiny

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
You have the pattern of "difference of squares" (csc(B)+cot (B))(csc(B)-cot(B)) = csc^2 B - cot^2 B But csc^ B = 1 + cot^2B , one of the identies from sin^2 B + cos^2 B= 1 so csc^2 B - cot^2 B = 1 + cot^2 B - cot^2 B = 1
Wednesday, January 23, 2013 at 9:45pm by Reiny

Trig.
Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^3/2 + 64 = 0
Wednesday, January 9, 2008 at 8:55pm by Hellga

trig
The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s= 2 sin pi t + 3 cos pi t, where t is measured in seconds. (a) Find the average velocity during each time period: (i)[1,2] (ii) [1,1.1] (iii) [1, 1....
Tuesday, September 23, 2008 at 8:40pm by Sarah

Trig 30
x/2 = 2pi/3 yields a unique solution of x = 4pi/3 Does this answer come from some trig equation? Your subject title suggests that. In that case find the period of the trig function, then add k(period) to 4pi/3, k an integer.
Friday, March 19, 2010 at 7:59pm by Reiny

graphing trig functions
I see the equation of a straight line, not a trig function
Sunday, May 20, 2012 at 10:15pm by Reiny

Trig
Solve the following trig equation 2cos(x-π/6)=1
Tuesday, January 31, 2012 at 2:51am by Matt

Trig/Pre-Calc
Need help with current Trig problem for tomorrow: Solve the logarithmic equation algebraically. Approximate the result to three decimal places. 6log3(0.5x)=11 I know to start off the equation you divide by 6. I know the answer is 14.988. I just am puzzled on how to receive the...
Monday, May 16, 2011 at 6:18pm by Eric

Trig
Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation
Tuesday, March 1, 2011 at 5:23pm by Anonymus

HELPPPPPPP (TRIG)
solve the equation 2 sec x- tan x = cot x for the interval 0 to 360 please:)
Thursday, May 20, 2010 at 9:26pm by HELPPPP

Trig
Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!
Monday, October 18, 2010 at 11:07pm by Valerie

trig
Can someone please help me solve this equation? Solve the equation in the interval [0, 360). csc θ = 1 + cot θ
Monday, May 3, 2010 at 7:06pm by Dee

alg2/trig
what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.
Monday, January 23, 2012 at 9:29pm by lisa

trig
forgot to mention that you cannot just skip the "angle" after a trig operator. What you typed would be like having an equation of the type ... √ = ∫ + ∑
Friday, January 24, 2014 at 8:46pm by Reiny

trig
How do you solve cos(2arcsin 1/4) using inverse trig. functions??!! PLEASE HELP ME!
Monday, May 9, 2011 at 11:20am by Tor

trig
I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx
Thursday, January 19, 2012 at 8:45am by Claire

trig
I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx
Thursday, January 19, 2012 at 8:45am by Claire

trig! please help!
to bobpursely: i need to simplify the expression using trig identities. and no i meant for there to only be x
Sunday, May 13, 2012 at 8:59pm by Brianna

trig
Oops sorry the equation is: tan x + 1 = 0 P.S Please stay online I have a test tommorow and I really need your amazing help on this stuff :)
Thursday, May 1, 2008 at 4:31pm by Priya

Trig
please show me again in trig way
Saturday, May 17, 2008 at 12:40pm by Doni --i didnt get this one can please show me the trig way a little bit more clrealy

Trig
looks like "homework dumping" to me I have two of them for you. Please indicate where you are having difficulties with these standard type of trig questions.
Tuesday, September 17, 2013 at 11:24pm by Reiny

Trigonometry
Can you please help me solve this trig equation for 0 ≤ x ≤ 2π? 9sin^2(x)-6cos(x)-10=0 Thank you!
Sunday, December 7, 2008 at 10:39pm by Lucy X

Maths - Trig
Usually my first step in proving any trig identity is taking an arbitrary angle to see if it makes it true, say 45 degrees. Picking up from Damon's first line, your equation is tanx + cotx = 2/sinx for x = 45 degrees LS = 1+1 = 2 RS = 2/.707 which is not LS so the equation is ...
Thursday, February 19, 2009 at 1:21am by Reiny

trig
solve each equation for 0 less than or equal to x greater than 2. cotx-cscx=1 thanks:) step by step please :)
Wednesday, March 9, 2011 at 9:04pm by Rachael

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

physics i got link
because if you used that angle then the force of gravity wouldn't be the hypotenuse which it clearly is in the equations fg x = fg sin theta 2 = fg sin 37 fg y = fg cos theta 1 = fg cos 37 I understand components and why you have to resolve into components and that they have ...
Monday, August 10, 2009 at 12:19pm by confused

trig
testing if x = 20 LS = cot60/csc20 = sin20/tan60 = .1975 RS = cos20(1/sin40 - 1) = .5222 Your equation is NOT an identity. A check should always be your first step when proving complicated-looking trig "identities".
Wednesday, October 21, 2009 at 10:08pm by Reiny

Math- gr.12 Trig.
Hi, could someone explain to me how to use a counterexample in trig to prove whether something is either an identity or equation? For ex. how would you do that with this question? sec^2x-tan^2x= cos x
Monday, January 11, 2010 at 7:15pm by May

trig
if one of a quadratic equation is 1/2-2i, what is the equation. the other root is 1/2+2I but i dont know how to find the equation
Thursday, April 5, 2012 at 11:02pm by Jess

trig
find an equation of the line that passes through (2,-4) and is parallel to the line 3x-y=1. Write your answer in the form y=mx+b. please help!
Tuesday, February 26, 2008 at 11:26am by Lou

algebra
think of a condition under which product of anytwo binomials is a bionomial. you can support your answer with the help of one of the identies of factorization of polynomials A binomial is a polynomial with two terms. Try (x -a)(x + a)and see what you get.
Tuesday, April 10, 2007 at 9:27pm by Liam

math
could someone please refresh my memory of the basic trig functions? ex) cos^2 + sin^2 = 1? That is a trig identity. http://www.sosmath.com/trig/Trig5/trig5/trig5.html
Thursday, April 12, 2007 at 10:18pm by raychael

trig
Please check if there should be two equal signs in the equation, and also if the 1-tanx and 1-cotx should have been in parentheses.
Tuesday, June 2, 2009 at 6:26pm by MathMate

Trig
Why did you label this "trig" ? Your expression should be an equation if it is to represent either an ellipse or a hyperbola. Should it be ....... = 1 ? secondly, you have "bouncing exponents" What is (x+3)^2/4^2 supposed to say? the way you typed it, it would simplify to (x+3...
Saturday, January 14, 2012 at 2:08pm by Reiny

Trig/Pre-Calc
Could someone please help me on this problem. I'm really confused, and this assignment is due tomorrow. Solve the logarithmic equation algebraically. Approximate the result to three decimal places. log4x-log4(x-1)=1/2 To start off the equation, I know you would do the ...
Monday, May 16, 2011 at 7:01pm by Eric

trig
covert polar equation r = 6/(2-3sin) to rectangular equation
Wednesday, March 2, 2011 at 3:53am by Anonymous

trig 30
Please help I need to solve the following question for x, where 0<x<2pi. and then write a general solution for the equation. The question is 2cos^2 x + cos x =1. I need to solve this using radian measurement. I solved it using algebra and was told I wasn't allowed. Could...
Thursday, April 29, 2010 at 10:01pm by Rae

Solving Trig equation
Solve the trig equation exactly in the interval 0≤x≤2π. tan x + tan π/3 ------------------ = square root 3 1 - tan x tan π/3
Friday, April 27, 2012 at 11:41pm by Anonymous

Trig?Precalc
write the rectangular equation x^2+y^2=6 in polar form. I do not want people to just post the answer! Please, show your work so that I can understand how to do these kinds of problems myself! Thank you and God Bless!
Thursday, April 19, 2012 at 12:40pm by tabby

Trigonometry/Geometry - Inequalities
Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This looks like a geometry...
Saturday, December 7, 2013 at 4:58pm by Sam

Algebra2/Trig
Find an equation of the parabola with vertex at the origin. Passes through the point (4,6); horizontal axis. I know it has to be y^2=4px. But I don't know what to do with (4,6). Please show step by step. Thanks.
Tuesday, February 3, 2009 at 9:41am by Vincent

Trig
Im having serious issues with verifying Trig. identities. Please help! Here is an example: (tanX-secX)^2= 1-sinX/1+sinX
Monday, November 7, 2011 at 7:24pm by Rachel

trig
How do I dertermine the measure of theta for the equation 4cos theta - sqrt 12 = 0. My answer was 2pi/3,4pi/3 I'm told it's wrong could you please show me how to do this type of question
Wednesday, March 17, 2010 at 10:06pm by jamie

Precalculus
Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?
Friday, January 27, 2012 at 8:21pm by Melissa

Trig
can I please have help with these 3 questions? 1. Solve this equation graphically on the interval [0, 2]. list the solutions. sin(2x)-1=tan x 2. solve sin x cos x= sqrt3/4 3. solve tan^2 x-3tan x+2=0 thank you! show step by step please.
Friday, April 13, 2012 at 2:02am by BreAnne

TRIGONOMETRY
Can you please help me with this question on my study guide for my trig final? Thanks! I'd also appreciate if you can check out my other postings and check my work for some other study guide questions. I want to make sure I'm ready for my final. :) 4. Transform each polar ...
Thursday, May 16, 2013 at 11:29am by Kate

Alg2/Trig
How would I go about solving this equation algebraically? Find the equation of the parabola y=ax^2 + bx+c that passes through the given points. (2,0) (3,-1) (4,0) Thanks.
Thursday, March 5, 2009 at 8:09pm by Chris

TRIG help quickly please
Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you π/8 -7π/4 15π/4 3π/4
Tuesday, January 14, 2014 at 10:55pm by Greg

Trig.
Can someone please help me with this? Find all solutions to the equation in the interval [0,2pi) cos2x=sinx I know I have to use some sort of identity, but I have no idea how to go about to solve this.
Saturday, February 27, 2010 at 8:55pm by mary

Math (Trig)
I don't think your equation is an identity, I tried several angles and the Left Side is not equal to the Right Side. Check your typing. In general, I try to prove these type of identities by changing everything to sines and cosines, unless I can recognize one of the common ...
Wednesday, April 9, 2008 at 2:06pm by Reiny

Trig
Find an equation for the hyperbola described. Foci at (-4,0) and (4,0); asymptote the line y= -x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem.
Tuesday, July 19, 2011 at 11:08pm by EVJ

trig
solve each equation for , giving a general formula for all of the solutions: 6. tan=-1 7. sin(/2)=1/2 Please show step by step on how to solve these. Im not sure on how to do them. Thank you for your help!
Wednesday, March 7, 2012 at 7:21pm by BreAnne

trig
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!
Friday, October 1, 2010 at 12:38pm by Bethany

Precalculus
I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the other, like a kind of ...
Thursday, December 2, 2010 at 10:11pm by Christina

Trig
A curve with polar equation r=(8)/7sinx + 36cosx represents a line. This line has a Cartesian equation of the form y=mx+b ,where m and b are constants. Give the formula for y in terms of x . For example, if the line had equation y=2x+3 then the answer would be 2x+3 .
Monday, December 13, 2010 at 11:13pm by Audrey

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 ...
Monday, April 30, 2007 at 10:33pm by jacob

Trig
The six in the first equation represents a reciprocal wavelength, also known as the wave number. y - a cosbx is NOT an equation An equation would be y = a cos bx b would be the wave number.
Friday, January 22, 2010 at 11:04am by drwls

Trig Equation
Any positive or negative integral multiple of 30 degrees (x=pi/6), including 0 degrees, satisfies the equation.
Saturday, March 1, 2008 at 1:52am by drwls

trig
Solve the triginometric equation analytically. Use values of x for 0 less then or equal to x less then 2pi The equation for this question is sin2x + cos2x = 0
Thursday, May 1, 2008 at 4:40pm by Priya

11th grade math algebra 2 trig
i solved for the longer equation and got a=b+4 i put that in the smaller equation and got b-2=b iam confused
Thursday, October 9, 2008 at 9:37pm by Nick

trig
can you please show me in steps how to find f(1+a) in this equation f(x)=-2x^2+4x+6 i know that you will plug in 1+a anywhere there is x. but after that i get confused. also can you tell me how to find the domain and range of a relation for ex. 2x+5y=10 thanks for your help!
Friday, November 14, 2008 at 11:25am by y912f

Trig
How do i set this trig problem up? PLEASE help me. Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = -1/2, with t in quadrant 4.
Monday, May 3, 2010 at 1:06am by Dave

Advanced Functions
Consider the trig equation: 4sinxcos2x + 4cosxsin2x - 1 = 0 in the Interval [0, 2 pi] Either show that there is no solution to the equation in this domain, or determine the smallest possible solution.
Monday, November 16, 2009 at 5:24pm by Anonymous

Math - Trig
The equation y = 20sin(0.5θ - 2) + 40 models the monthly temp for a certain city. Use the equation to predict the temperature in the city during December. Thanks
Thursday, October 10, 2013 at 12:46am by Lilly

trig
I tried your "identity" with some random angle and the left side did not equal to the right side, the way you typed the equation. So unless we know the order of operation there is no point in attempting to prove it true. Please insert brackets in the correct places.
Thursday, December 16, 2010 at 9:54am by Reiny

trig
Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to get the answer.
Monday, September 5, 2011 at 7:27pm by Charles

Trig
Solve the trig equation exactly over the indicated interval. tanθ = 0, all real numbers I know the answer is πn, but I don't understand how they got this. I get that tanθ = 0 on π and 2π on the unit circle, so did they just put n on the end of π ...
Sunday, April 7, 2013 at 1:48pm by Anne

Trig
In the equation y=4cos 6x, what does 6 represent? In general for the equation y-acosbx, what does b represent?
Friday, January 22, 2010 at 11:04am by Kevin

FINANCE/MATH
Please use both M&M proposition II with taxes equation and WACC equation to derive the following equation:? WACC = Ru X [1- Tc(D/V)]? I need this by tomorrow please help.
Wednesday, December 8, 2010 at 12:32am by Anonymous

trig
what equation?
Thursday, May 1, 2008 at 4:31pm by Reiny

trig
let h be height. Let d be the distance from the first observation to the bridge. h/d=tan62.6 and h/(d-20)=tan72.8 in the first equation d=h ctn62.6 second equation d=h ctn72.8 +20tan72.8 set these two equations equal, and solve for h.
Thursday, January 15, 2009 at 9:55pm by bobpursley

Math: Solving Trig Equation
there's no equation the expression is equivalent to (9tan^2-9sec^2)/tan and since sec^2-tan^2=1, that's just -9/tan
Sunday, March 31, 2013 at 1:16am by Steve

trig
how would you verify this trig identity (1+cos(x) / 1-cos(x)) - (1-cos(x) / 1+cos(x)) = 4cot(x)csc(x) ? help please!
Wednesday, June 25, 2008 at 5:25pm by amanda

equation trig
thnx
Friday, May 7, 2010 at 12:35pm by VesaN

help, bobpursely
Please take a look at DEVON's trig equation at 9:14 I must be missing something obvious. If the second had been 3sin 2x it would be a straight forward question. The way it stands I was able to "reduce" it to the equation 8sin^4 x - 8sin^2 x + 3sin x + 2 = 0 I tested this ...
Monday, April 16, 2007 at 10:54pm by Reiny

trig
Please help me! SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Verify that each equation is an identity. (sec α + tan α)^2 = 1 + sin α/1 - sin α
Sunday, May 2, 2010 at 8:06pm by Lilli

Classical Mechanics Physics - Urgent help please
After finding f_x, use that value in the equation Torque=I_cm *alpha equation (containing F_y and F_x), i think you don't need to find a_y. May I ask how to apply to the equation, please?
Saturday, December 7, 2013 at 5:46pm by keitanako

trig
find each value by referring to the graphs of the trig functions. 1. sec 4 pi...i got 0 Find the values for theta for which each equation is true. csc (theta)=1 i got pi over 2 +2 pi n
Sunday, October 26, 2008 at 9:27pm by gaby

Trig/pre-calc
r=8cos(theta)+5sin(theta), convert the polar equation into a rectangular equation and then complete the square and determine the center radius...? Help?! I missed the section, and am not getting anywhere with the text...
Friday, August 12, 2011 at 7:21am by A

trig
how do you graph the equation y=-2cosx?
Monday, February 15, 2010 at 6:09am by Cutie_27

trig
You have no equation to solve
Monday, August 15, 2011 at 12:29am by Reiny

Trig
use the equation y=mx+b
Sunday, September 23, 2012 at 8:47pm by Dr. Shields

trig
N 5 22x2 1 76x 1 430 Use the equation to find N for each year in the table. (b) Discuss how well this equation approximates the data. (c) Rewrite the equation with the right side completely factored. (d) Use your equation from part (c) to find N for each year in the table. Do ...
Friday, July 1, 2011 at 9:15pm by mmmm

alg2/trig
4 x ^ 2 + 9 = kx 4 x ^ 2 - k x + 9 = 0 Quadratic equation has two real roots, if Discrininant = 0 = b ^ 2 - 4 * a * c In this case : a = 4 b = - k c = 9 = b ^ 2 - 4 * a * c = ( - k ) ^ 2 - 4 * ( 4 ) * 9 = k ^ 2 - 144 = 0 k ^ 2 - 144 = 0 k ^ 2 = 144 k = sqrt ( 144 ) k...
Thursday, April 5, 2012 at 10:07pm by Bosnian

Pre-Calc/Trig
Please help-I'm stuck really bad What are the roots of the equation x^2 - 4x + 3 = 0 I think I was suppose to use b^2 - 4ac so it would be -4 - (-4)*1*3 = 12 so the roots would be 12 and -12 Thank you for any help you can provide
Tuesday, September 6, 2011 at 5:05pm by Sheila

math/trig
What graph is traced by the equation (x, y) = (5sin 12t , 6−5 cos 12t)?Think of another equation that will produce the same graph. Use your calculator to check.
Sunday, April 11, 2010 at 8:42pm by sally

Alg 2 trig
Write a sine equation for period= pie, amplitude=1/2, vertical shift up 1 and phase shift left pie/4. How would the equation be written?
Friday, March 9, 2012 at 11:05am by Nicole

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