# 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