Number of results: 3,177
this is wrong.
Tuesday, May 18, 2010 at 5:35pm by kiki
in triangle ABC, angle a=120, b=10, and c=18. What is the area of triangle ABC tot he nearest square inch?
Tuesday, May 18, 2010 at 5:35pm by Sally
perfect setup for using area = (1/2)(b)(c)sin A, where A is the contained angle. area = (1/2)(10)(18)sin 120° = 77.94 or 45√3 as an exact value.
Tuesday, May 18, 2010 at 5:35pm by Reiny
Sunday, April 29, 2012 at 3:05pm by Makenzie
Find F-1(x) F(x) =(x+2)2-5, x≥-2
Saturday, June 4, 2011 at 9:10pm by Altagrace
Tuesday, October 19, 2010 at 7:02pm by amanda
I need an algrbra expression
Thursday, November 18, 2010 at 7:30pm by Alex
f(x)= x+5, if x>0 3, if x¡Ü0 and how would i graph this?
Sunday, July 3, 2011 at 5:04pm by HELP
cross multiply x/49 = 10/8 solve for x
Monday, July 1, 2013 at 1:57pm by Kuai
I have responded to an earlier post of the same question.
Thursday, November 1, 2007 at 1:11am by drwls
Find the slope of the line containing the points with coordinates (-6, 4) and (2, 4)
Friday, October 16, 2009 at 7:48pm by SArA
Find the value of the polynomial when x = 4. 4x3 - 3x2 - 3x + 2
Friday, October 16, 2009 at 7:48pm by SArA
Rewrite the expression, using only positive exponents. x-5
Friday, October 16, 2009 at 7:49pm by SArA
coefficients of the given polynomial: -2x3 – 9x2 + 5x + 1
Friday, October 16, 2009 at 7:48pm by tina
check your typing. Is that supposed to be ax^2 in the denominator?
Monday, December 17, 2012 at 11:11pm by Reiny
Complete the ordered pair (15, ) for the equation x - 5y = -25
Friday, October 16, 2009 at 7:47pm by SArA
need help with math problem 15-2(5-2) Answer=10
Sunday, August 28, 2011 at 9:08pm by Ann
1-9 in oreder insert oprestion sight and grouping symbol to get a value of 100
Thursday, August 8, 2013 at 6:05pm by surafel
go to google and type degree for right triangle trigonometry.and click on the second option which is:Trigonometry of rigth triangle. Topics in trigonometry. you will get ur answer. sorry couldnt paste the whole thing here hope i could help u.:)
Tuesday, February 10, 2009 at 4:10pm by vero
Well, i tried to see the beauty in trigonometry but to me, it is just too HARD!!!!!!!! There r so many formulae in trigonometry and how to i know which one to use. After i stay in the desk for 15 mins, i just wanna throw this stupid book away. I cant gain anything even i try ...
Saturday, July 19, 2008 at 1:03am by Tommy
This is quite straightforwatrd. x is 15, so 15 - 5*y = -25 so what is y?
Friday, October 16, 2009 at 7:47pm by jim
if you square it you get d^2 +14d+49 but that is redundant because when you factor its just d+7 still so just take d+7 and set it equal to zero and d=-7
Sunday, April 29, 2012 at 3:05pm by visoth
This is not a trigonometry question. x^2 + 7x + (7/2)^2 = 11 + (7/2)^2 (x + 7/2)^2 = 23 1/4 x = -7/2 +/- sqrt(93)/2
Thursday, November 12, 2009 at 10:15pm by drwls
Given the following rational function, f(x)=x^2-x-2/ax^2-x-21 find (a) the horizontal asymptote(s) (b) the vertical asymptote(s), if any and (c) the oblique aasymptote(s) if any
Monday, December 17, 2012 at 11:11pm by Sherri
Just expand it ... 8x^3 - 6x^4 - 5x^2 + 10x all done! Why are you calling this trigonometry?
Sunday, December 26, 2010 at 5:55pm by Reiny
Thanks a lot, sorry I am not too good at trigonometry
Thursday, March 28, 2013 at 8:25am by Knights
this is trigonometry.. its the class i'm taking and my book is called, functions, statistics, and trigonometry. scott, foresman.
Wednesday, November 12, 2008 at 11:12pm by jerson
By the way, this is not trigonometry. It is algebra.
Wednesday, August 12, 2009 at 8:48pm by drwls
The question is not about trigonometry.
Sunday, December 26, 2010 at 5:55pm by drwls
If a hen and a half lays an egg and a half in a day and a half, how many eggs will six hens lay in six days?
Monday, January 2, 2012 at 4:36pm by Anonymous
Reiny, I interpret "inverse" being inverse trigonometric function, since he is doing a trigonometry course. However, I stand to be corrected!
Thursday, March 3, 2011 at 1:35am by MathMate
Why did you title this "trigonometry"?
Saturday, June 4, 2011 at 9:17pm by Reiny
Divide the difference in the y coordinates by the difference in the x coordinates to get the slope.
Friday, October 16, 2009 at 7:48pm by jim
What property is c to the seventh power x 1= c to the seventh power?
Tuesday, October 19, 2010 at 7:02pm by Amanda
I am surprised that you are studying trigonometry and don't know the basic shape of y = sinx Surely your instructor has taught you how to sketch the basic graphs before jumping to technology methods.
Tuesday, April 3, 2012 at 6:25pm by Reiny
Use substitution... x^2 + 4x + 4 = 4x + 6 x^2 = 2 x = ± √2 Why are you calling this trigonometry?
Saturday, November 26, 2011 at 3:24pm by Reiny
Given the following quadratic equation, find a. the vertex b. the axis of symmetry. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function y=x^2-6x
Monday, December 17, 2012 at 8:36pm by Sherri
let's complete the square on y = x^2 - 6x y = x^2 - 6x + 9 - 9 = (x-3)^2 - 9 It is now in the form y = a(x-p)^2 + q the form you should find in your text or your notes All your question can now be answered without any further calculations.
Monday, December 17, 2012 at 8:36pm by Reiny
I will assume you meant to type f(x) = (x+2)^2 - 5 or y = (x+2)^2 - 5 inverse: x = (y+2)^2 - 5 solving this for y: (y+2)^2 = x+5 y+2 = √(x+5) y = -2 ± √(x+5) f^-1 (x) = -2 + √(x+5) or -2 - √(x+5) notice the inverse is not a function
Saturday, June 4, 2011 at 9:10pm by Reiny
i know an education is important, but i don't think i'll need to know u.s. history, or trigonometry in the future. i plan on doing something in the cooking field as a career, and most people i know who do that didn't really get good grades on their trigonometry classes.
Tuesday, May 26, 2009 at 10:18pm by y912f
This is not about trigonometry. x^2 = -121 x = the square root of -121.
Thursday, November 12, 2009 at 10:37pm by drwls
Replace with or replace for? Sentence: I want to replace algebra (with/for) trigonometry. If I use the word with, then does that's an I want trigonometry and not algebra? If I use the word for, then does that mean I want algebra and not trigonometry? Any rules?
Thursday, August 29, 2013 at 2:16pm by Anonymous
Write an equation of the line containing the given point and perpendicular to the given line. express your answer in the form y=mx+b. (-5,7); 2x=9y+4 the equation of the line is y=?
Tuesday, September 22, 2009 at 2:59pm by spirit73
algebra 2 with trigonometry
What is the problem? (6t-4)-(6t2+t-2) = 6t - 4 - 6t^2 - t + 2 = -6t^2 + 5t - 2 Why did you label this algebra2 ? Secondly where does the trigonometry enter the picture?
Thursday, January 5, 2012 at 12:25pm by Reiny
Do you mean (5d -1)^4 ? Square 5d -1 twice. The first squaring will give you 25d^2 -10d +1 Now square that. There will be more terms next time. This is not trigonometry
Saturday, June 4, 2011 at 9:18pm by drwls
Damon! Thank you! You are very generous with your skill and knowledge. If you have time, would you take a look at some other algrbra problem I need help and understanding with? Unlike some others, you have been most thourough in explaining the process. Thank you, Carl.
Wednesday, January 23, 2008 at 7:32pm by Carl
I don't get 10. 15-2(5-2) 15 - 10 + 4 = 9 ________________________________ 15-2(5-2) 15 - 6 = 9
Sunday, August 28, 2011 at 9:08pm by Ms. Sue
What is Trigonometry?
Wednesday, January 30, 2008 at 5:27pm by Beast
4 times as many hens 4 times as many days you get 16 times as many eggs. 16 * 3/2 = 24 eggs
Monday, January 2, 2012 at 4:36pm by Steve
determine the trend of each linear function: 1. f(x)= 3x+5 I don't know what you call the "trend" or why you call this a trigonometry question. It is about algebra. The value of the function increases with x at a rate of three times the change in x.
Tuesday, July 10, 2007 at 12:09am by hugh
Thanks for the prompt reply. How do these work out? The Odd/Even Identities? sin -x = -sin x cos -x = cox x tan -x = -tanx Why does this work out? Does it apply to certain quadrants or something? Thanks.
Sunday, January 22, 2012 at 11:29pm by Trigonometry
your Dad is making the connection between the "unit circle" and basic trigonometry. Do a Google search for "unit circle" or "trigonometry and the unit circle" You will get many webpages, here is one that seems to be quite good (Broken Link Removed)
Saturday, August 23, 2008 at 12:06pm by Reiny
High School Courses
How often do state colleges which are moderately competitive require trigonometry? Is trigonometry something like algebra that they expect you to have, or do they usually not care as long as you have the right number of math courses? Would it look better for me to take ...
Tuesday, March 31, 2009 at 4:11pm by Evelyn
okay so i have this trigonometry problem were i HAVE to use logarithms. Now this is my work but can u help me solve it using logarithms. Find the area of the following triangles:(use logarithms) 1) c=426, A=45degrees 48' 36",and B=61degrees 2' 13"
Sunday, February 20, 2011 at 11:30pm by anon
is this translated right? In the morning I wake up at 8:30 a.m. The first thing I do is brush my teeth and comb my hair. Then I eat breakfast. By 9:00 a.m., I start my schooling (home). The first thing I work on is trigonometry. Then I do English, Trigonometry, American ...
Sunday, May 3, 2009 at 6:14pm by y912f
This is not calculus. It is basic trigonometry. The kite is 300 sin 57 above her hand. Add 3 feet to that for the height above the ground. Assume the string is 300 feet long, not the kite itself
Monday, March 8, 2010 at 11:00pm by drwls
What are these things called: -cos x = cos -x What are the rules to these trig rules? Thanks
Sunday, January 22, 2012 at 11:29pm by Trigonometry
A pine tree casts a shadow that is 49 feet long. A 10 foot sign next to it casts a shadow that is 8 feet long. How tall is the pine tree?
Monday, July 1, 2013 at 1:57pm by stoker
Solve for x to the nearest hundreth and can you explain how you get your answer I don't understand 3^x = 1.295 Your question has nothing to do with trigonometry. You can solve for x by taking the logarithm (to any base) of both sides of the equation. Then x log 3 = log 1.295 x...
Sunday, June 10, 2007 at 1:24pm by Linda
A weight is oscillating on the end of a spring. The position of the weight relative to the point of equilibrium is given by y=1/12(cos8t-3sin8t), where y is the displacement (in meters) and t is the time (in seconds). Find the times when the weight is at the point of ...
Monday, November 17, 2008 at 10:46pm by *tRiGoNoMeTrY*
I answered the same type of question for you in http://www.jiskha.com/display.cgi?id=1253635946 follow those steps
Tuesday, September 22, 2009 at 2:59pm by Reiny
Help!! I do not understand how to work these types of problems. My instructor gives us really long formulas and charts for these and i don't get it!! Im good at algebra, I have an A in the class, so this is irritating to me! The radiator in a certain make of car needs to ...
Wednesday, February 8, 2012 at 11:42pm by Nicole
Did you not like the answer I gave you yesterday? Notice that Steve got the same answer. http://www.jiskha.com/display.cgi?id=1325446688
Monday, January 2, 2012 at 4:36pm by Reiny
Do you have a calculator? I assume that the log you are talking about is base 10. log(47) = 1.672 log(w) = -2.866 + (2.722)(1.672) = 1.6855 w = 10^1.6855 = 48.5 lb This subject is not trigonometry. It is logarithms. You need a scientific/math hand calculator or a computer to ...
Wednesday, January 30, 2008 at 5:27pm by drwls
http://easycalculation.com/trigonometry/triangle-types.php What do you think?
Wednesday, November 9, 2011 at 6:43pm by Ms. Sue
Reposted: Maths - Trig
Here you will find a proof of that trigonometric identity: http://library.thinkquest.org/C0110248/trigonometry/formsine.htm
Sunday, December 2, 2007 at 6:12pm by drwls
Print out the "trig wheel" on this page, it will come in handy http://ll043.k12.sd.us/slides/trigonometry.htm
Monday, November 22, 2010 at 10:15am by Reiny
Trigonometry identities are so hard... I need some help proving these identities: *Oh, and I'm only in grade 11, so the identities we use are quotient identity and Pythagorean identity. sinx/(sinx + cosx) = tanx/(1 + tanx) cos^2x - sin^2x = 2cos^2x - 1 Thanks! Lucy
Sunday, April 13, 2008 at 9:53pm by Lucy
Why are you calling this trigonometry? width -- x length -- x+2 area = x(x+2) new width = x+4 new length = x+6 new area = (x+4)(x+6) (x+4)(x+6) - x(x+4) = 72 solve for x
Monday, October 10, 2011 at 10:10pm by Reiny
using basic trigonometry derive the following equations, which are used to convert cartesian to polar coordinates and vice versa. why is the cos(phi)in the x term? x = R cos (phi) sin (lamda) y = R sin (phi) they are used in orthogonal projection of a spherical surface to a ...
Sunday, October 16, 2011 at 11:32am by forest
first use the formula 180/pi to go from radians to degrees, simplified you get 197.6704393, now multiply the decimal by 60 (because there are 60 minutes in an hour, get it??)and you get 40.226358, to the nearest minute its 40 so all together 197 degrees, 40 minutes. is ...
Saturday, March 27, 2010 at 12:27pm by Anonymous
•Trigonometry - Bosnian, Sunday, September 9, 2012 at 1:07am Area of right triangle = 1 / 2 Area of a rectangle In this case: A1 = ( 1 / 2 ) * 8 * 15 = 60 units When each side is doubled: A2 = ( 1 / 2 ) * 2 * 8 * 2 * 15 = 4 * ( 1 / 2 ) * 8 * 15 = 4 A1 A2 = 4 * 60 = 240 units
Saturday, September 8, 2012 at 11:55pm by Bosnian
The way I understand it is that ALGRBRA wants to have the steps above labeled 1) 2) and 3) in mathematical statements. So.... 1): Population growth = (20743300 - 20605500)/20605500 = .0066875 = .67% 2): amount of growth of the population in 2007 = 20743300(.67%) = 20743300(....
Thursday, November 1, 2007 at 1:06am by Reiny
Let the trapezoid ABCD be of height h. Given: AB = 22 CD = 12 DAB = 65° ABC = 40° Construct a diagram and consider the trigonometry: (1) AB = CD + h cot(DAB) + h cot(ABC) (2) BC = h sec(ABC) (3) DA = h sec(DAB) Substitute the values into (1) to solve for h. Substitute h into (...
Sunday, September 1, 2013 at 11:46pm by Graham
A certain paperback sells for $12. The author is paid royalties of 11% on the first 10,000 copies sold, 12.5% on the next 5000 copies, and 18% on any additional copies. Find a piecewise-defined function R that specifies the total royalties if x copies are sold. Please help me ...
Wednesday, October 24, 2012 at 3:15pm by Pete
verify the identity: 1-cos^2x/1-sinx= -sinx Trigonometry - Damon, Monday, May 30, 2011 at 6:43pm assume you mean (this took some serious detective work - please be careful with parentheses) 1- (cos^2x)/(1-sinx)= -sinx cos^2x = 1 - sin^2 x so we have 1 - (1-sin x)(1+sin x)/(1-...
Monday, May 30, 2011 at 7:08pm by Damon
Here is the page of identities: http://www.trans4mind.com/personal_development/mathematics/trigonometry/sumProductCosSin.htm#Products I can not possibly help you on here typing all this. Plan on getting a yellow legal pad and be careful.
Sunday, May 13, 2012 at 9:08pm by bobpursley
I don't know how many trig ratios of half-angles you have developed or know but here is a page where many of them are done. http://www.intmath.com/analytic-trigonometry/4-half-angle-formulas.php about 2/3 of the way down you should find tan [(A+B)/2) = (sinA +sinB)/(cosA + ...
Monday, September 5, 2011 at 7:06am by Reiny
Trig-Weird Geometry Problem
You will find a nice discussion at http://answers.tutorvista.com/1101359/trigonometry-application-rule.html showing that if A+B+C=180, tan(A-B)+tan(B-C)+tan(C-A) = tan(A-B)*tan(B-C)*tan(C-A) Given that, one of the factors must be zero. So, A=B or B=C or A=C. That is, the ...
Thursday, December 5, 2013 at 11:02am by Steve
I really need help with this trigonometry question.please any help is appreciated. 1.I have to draw the graph of y=cos x from 0deg to 360deg. 2.Be sure to show a table of vales similar to the this table. colum X l colum :y=sinx 0 l 0.00 pi/10 l 0.31 pi/5 l 0.59 3pi/10 l 0.81 ...
Monday, March 7, 2011 at 7:56am by anon
Saturday, November 29, 2008 at 6:04pm by Tyler
Thursday, January 15, 2009 at 8:17pm by mysterychicken
so is it A??
Friday, January 16, 2009 at 4:53pm by y912f
Friday, January 16, 2009 at 4:53pm by drwls
Friday, January 16, 2009 at 8:04pm by y912f
A -4(2)+ 8 = 0 B -4(1)+ 8 = 4 A-B = 0 - 4 = -4
Wednesday, February 25, 2009 at 3:59pm by Damon
Friday, January 1, 2010 at 5:58pm by Grace
You are welcome
Wednesday, June 9, 2010 at 8:11pm by Reiny
Thursday, September 16, 2010 at 8:14pm by MathMate
Monday, October 18, 2010 at 5:52pm by MathMate
Sunday, January 9, 2011 at 11:09pm by alex
Sunday, January 9, 2011 at 11:09pm by helper
Friday, March 4, 2011 at 12:06am by MathMate
Sunday, August 28, 2011 at 6:49pm by Andres
Oh okay thanks!
Saturday, October 29, 2011 at 7:55pm by ALISON
Tuesday, December 20, 2011 at 8:40pm by Britt
Monday, December 3, 2012 at 7:41pm by Anonymous
thank you ..!!!.
Sunday, January 6, 2013 at 1:04am by Denisse
Monday, January 7, 2013 at 5:02pm by eva
Tuesday, March 5, 2013 at 8:13pm by CARL