Trig check my work please?

87,593 results, page 49

Genera Chemistry

Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

math

can you please work this out for me??... your bedroom is 4m (400 cm) long and 3m (300 cm) wide. If you draw a rectangular plan 2cm by 1.5 cm, what is the scale of your drawing?

5 th grade

What is the median fo the following set of numbers? 404,650,585,435,680,342,798 please! show me the work. thank you!

Math- Problem3

Solve the following inequality and write your answer using interval notation. Please show all of your work. (1 / (x+8) ) ≤ ((8-5x)/43)

Stats

Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9

chemistry

Consider the reaction Mg +2HCl ------>MgCl2 + H2 What is the minimum amount of 1.85M HCl is necessary to produce 28.5L of H2 at STP Please help me work this problem

algebra

perform the indicated operation and if possible,simplify please show all of your work. write your answer in lowest terms. 18/35 divided by 22/25

College Pre-Algebra

Solve -14x-7(4-x)< 3(2x-15). Write your solution using set builder notation. Please show all of your work.

algebra

Solve the following inequality and write answer using interval notation. Please show all of your work. 2x-5/3x^4-x^3+275x-125>=0

Pre-Calc

For the triangle shown, find the length AD. (Assume u = 18, v = 18, x = 10°, and y = 10°. Round your answer to two decimal places.) Show work please!!!

physics

A ball its thrown straight up into the air at 50 m/s find the balls velocity after 8 seconds show all work please

Math

Which of the following CANNOT be the average ( arithmetic mean) of four positive even integers? a) 1 b) 2 c) 6 d) 9 e) 17 ( please explain or show work. It will help me understand it better! Thanks)

satistics

Rank the following data in increasing order and find the position and value of the 65th percentile. Please show all of your work. 2 1 6 3 4 7 0 0 0 7 5 8

college alg

use the transformations to identify the graph of the function. then determine its domain, range, and horizontal asymptote. f(x)=4+3^X/3 please show work

math

please explain how to use hundreds chart to answer this queston;WHAT % OF THE NUMBERS ARE MULTIPLES OF BOTH 2 AND 3? i have no idea how to work it out, thanks

calculus

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work

AP Calculus

Show work to determine if the relation is even, odd, or neither. 1. 3x=|y| (|y|=abs. value of y) Simplify the following complex fractions. 2. [(3/x)-(4/y)]/[(4/x)-(3/y)] PLEASE HELP!

math/chem

If aluminum foil has a density of 2.70 g/ml, then how thick would be a 2.22 g sample of foilif it measures 5.0 cm on each side. PLEASE SHOW WORK THX!

Algebra

Use factoring and the zero-product property to solve the following problems: z(z - 1)(z + 3) = 0 x^2 - x - 10 = 2 4a^ - 11a + 6 = 0 9r^r - 30r + 21 = -4 Please show work. Thank you so much!

Algebra help

Find an equation of the line L, where L is perpendicular to y=3x and passes through the point (1,3) Please help I'm not sure what formula to use or how to work out this problem

Algebra 2

More About Complex Numbers: Solve x and y 4x+5y+13i=7+(6x+5y)i Please show work because I had a hard time finding the answer

Physics

Please help me with this question How much work is done by a boy of mass 70kg who ran up a flight of 31steps each15m high. Take g=10m/s^2

Calculus

∫ x^3 √(16-x^2) dx evaluated between [0, 4] I know this is solved using trigonometric substitution, but I'm not sure how to work it. Please show steps so I will understand.

Social Studies

A system in which a series of workers and machines work to add individual parts to a product is known as a(n)____and it_____. Link please to help me?

Probability & Stats

An experiments consists of tossing 4 coins successively. The number of sample points in this experiment is a. 16 b. 8 c. 4 d. 2 Please show work and why it is the answer! Thank you!

calc

find an equation of the line tangent to the circle (x-1)^2+(y-1)^2=25 at the point (4,-3) Can please someone explain this to me and show all work very confused

Please check my answers ASAP

I did the work I just want to see if half of my questions are right then ill post my other half after this so please check and thanks very much. ----------------------------------------1.Horses 2.everything 3.Brother 4.shoesand socks 5.games 6.event 7.End and table 8.rita 1....

Physics

A force of 3.00N acts through a distance of 12m in the direction of the force.Find the work done. work= force *distance If force is in newtons, distance in meters, the work unit is in joules.

GOVERNMENT HELP

Where did classical liberalism start? I know it started in Europe but was it Britain or France or both? I merely want to check my work. Bob Pursley do not answer this since you are so rude by suggesting that I want you to do my homework for me. http://en.wikipedia.org/wiki/...

probabilty

In a school, 14% of students take drama and computer classes, and 67% take drama Class. What is the probabilty that a students takes computer class given that the student takes drama class? i have no idea how to work this so please show me your work. Thanks!!

Math

1) 60 meters of fencing are needed to fence in a square lot. What is the area of the lot? a) 3600 m^2 b) 900 m^2 c) 225 m^2 d) 15 m^2 2) A can do a piece of work in r days and B, who works faster, can do the same work in s days. Which of the following expressions, if any, ...

trig

Determine the height of a tree which casts a shadow of 13.7m when the sun is at an angle of 28 degrees.

trig

Find all angles of a right triangle RST given that r = 18cm and s=20 cm

trig

What is the amplitude of y = (3sinx/2) + 4? Any link of proof would be appreciated if you have one Thank you

trig

Solve without using a calculator or tables cos(5pi/6 + pi/4) Thank you Reiny!:)

trig

Solve for the unknown. Assume that all of the angles are acute. 1. U = 69 A = 75 AN = 56 NU = ______ is this right NU= 92.05

trig

How do you find all the solutions of the equation in the interval [0,2π)? 3tan^3x=tanx

trig

If tan(x)=8/3 and sin(x)<0, then find cos (x) sec(x) csc(x) i don't understand how u do this problem

trig

a student fitted the line l to the data points (0,3), (2,3.6) (3,6), 6,3) find the center of gravity

trig

How do you find the exact value of an inverse function geometrically. ie, tan(cos-1(4/5))

trig

Find all solutions of the equation 2sin^2x-cosx=1 in the interval [0,2pi) x1= ? x2=? x3=?

TRIG

find: sin 23pi/12 i got totally the wrong answer how do i approach this?

trig

how can you confirm the identity cos^4x = (1/8)(3+ 4cos2x+ cos4x) and sin4x = (4sinxcosx)(2cos^2x-1)

Calculus (trig stuff)

given a angle how do I find it's point P on the unit circle?

trig

Express each value as a trigonomic function of an angle in quadrant I: Cot(-660)

Trig

If sin^2X=A what is an algebraic expression in A for cos(2X). I have no idea where to even begin with this!

gr 12. advanced functions

Trig identity Prove: cos2x tan(pie/4 - x) ------- = 1 + sin2x

trig

Use a half-angle formula to find the exact value of cos 5ð/12

Trig

How do you find csc 163degrees 20minutes? (I didn't know how to insert the degree and minute marks)

Quick Math trig question

Would sin^2x / cos^2x equal tan^2x?

trig

Given that sin = 3/5 and lies in quadrant II, find the following value. cos

trig

Determine a pair of coterminal angles in radian measure to the angle pi over 2

trig

findall exact solutions ( in terms of radians) to the equation 2cos(40)-radical 3 =0

Trig

evaluate exactly(without calculator): 1. sec(pi/4) 2.3sin4pi 3. tan240(degrees)

trig

how do you use doubel-angle formulas to find sin, cos, and tan

trig

Rewrite 3pi/25 in degree measure. Round to three decimal places.

Trig

Solve the right triangle ABC using the given information: cos A = 2/5 ; c = 15

trig

evaluate the trigonometry function using its period as an aid cos(-7pi/3)

trig

Hi,how do I find both solutions of the equation cos0 = 0.35 between degrees 0 and 360? Many thanks

trig

Calculate the amplitude, period, phase shifts, and 5 points for y=2-sin(2piex/3)

maths trig

if p and q are the solutions of the equation atanx+bsecx,show that tan(A+B)=2ac/(a^2-c^2)

trig

evaluate the expression: cot 270 + 8 cos 180 + 5 sec2-360

trig

3tan(3x) = sqrt(3) Solve the equation for exact solutions of the interval [0,2pi).

Trig

Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2

trig

Use the double angle formula to verify the identity cotxsin2x=1+cos2x

trig

Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)

trig

ABC is an isoscele triangle in which [AB]=[AC]=5cm and [BC]=6cm. Calculate [AM], where M is the mid-point of BC.

Calculus/ trig

Find the area bounded by the curve and the lines y=sinx, y= 1/2, x=5pi/6 and x=pi/6

Trig

a clock has a diameter of 1 foot what is the angular size if viewed from a distance of 27 feet

math

4cot^2x-4/tanx+cosxsecx factorin algenraic single trig function

trig

In Rights Triangle ABC with C=90 degrees if a=4 and c=2square roots of 7, find SinA

trig

In Rights Triangle ABC with C=90 degrees if a=4 and c=2square roots of 7, find SinA

Trig

Find all solutions of equation on interval [0,2pi] 1=cot^2x + cscx

Trig

Find all solutions of the equation on the interval [0,2pi): Tan^2x=1-secx

pre calculus 2

use the fundamental trig. Identities to simplify tan^4x+2tan^2x+1

trig and cotagent

Evaluate cot(11pi/6) to the nearest hundredth (given in radians).

trig

5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?

trig

find reference angle 111degrees and -105 does it equal =75? i don't know the first one

TRIG

A 5.5 ft tall woman casts a 6.2 ft shadow. Find the angle of elevation of the sun.

Trig

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!

trig

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?

trig

Find all values of x in the interval [0, 2π] that satisfy the equation. 6 sin2(x) = 3

trig

Triangle XYZ has vertexes at X(-4, 5), Y(-3, 5), and Z(-3, 4). Find the measure of angle Y to the nearest degree.

trig

Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 decimal places.

trig

what is the hietgh difference between 2 walls 6 metres apart to get a 17.5 degree pitch

trig

Q1: In a right-angle triangle the base is 50 m long and its height is 40 m .find its area

trig

Find another angle theta between 0 and 2pi that has the same cosine as 3pi/14

trig

Cos(-11/12) use the sum or difference formula to find the exact number

trig

Solve the equation for exact solutions over the interval [0, 2pi]. 4 cotx+2=-2

precalc/trig

Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)

trig

Find the exact solutions of the equation in the interval [0,2pi). sin(x/2)+cos(x)=0

trig

Find all the solutions of 2 sinx=1-cosx in the interval from 0° ≤x<360°

Trig

sin45cos25 + cos45sin25 = ?? a. cos70 b. sin70 c. cos20 d. sin 20 which answer is correct ??

trig

solve for x in the following equations: 1) sin(arcsin x) = 1 2) 2arcsin x = 1 3) cos(arccos x) = 1/3

trig

How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?

trig

If the line OP of radius and(x,y) is rotated through a certain angle about the oringin

Precal

Write down 3 other possible trig forms for - 1 + isqrt2. How do you solve this?

trig

Expan each of the following using the compound-angle formulae:sin(x + 20degree)

trig

find the general solutions to the equations: 1) sec x = -2 2) 2 sin^2 x = 1 3) cos^2 x - 2cos x + 1 = 0

trig

16. Let W(ƒá ) be a point in Quadrant I on the unit circle with center O. W(ƒá )B is perpendicular to the x-axis at B, OB = 0.6. and W(ƒá )B ƒ­ 0.8. Find:

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