# Trig check my work please?

88,665 results, page 72

### Trig

Write a quadratic equation whose roots are 5 + i radical 2 and 5 – i radical 2 ____ x^2 + _____ x+ ______=0

### trig

I have arrived at .322 as the sine of the angle how do I find the actual angle (in decimal/deg)

### Pre-Calc/Trig...

Which of the following is the equation of a line parallel to the line y = 3x + 2, passing through the point (10,1)? 3x + y = 29 3x - y = 29 -3x - y = 29 3x + y = 29

### Trig

Determine the intervals of continuity of f(x)= ln(sin(x)) I looked at the graph and I have no idea how to state the intervals.

### Trig

Write an algebraic expression for the following: sin(arctan〖(x+1)/(x-1)〗 )

### trig

Find the magnitude and direction angle of the vector v. v = 4(cos 125°i + sin 125°j) ||v|| = θ =

### trig

Find the component form of v and sketch the specified vector operations geometrically, where u = 4i − j, and w = i + 5j. v = −u + w v = ( , )

### math check

Posted by Nora 56 on Sunday, June 2, 2013 at 7:32pm. Sorry to repost but no one answered after I posted on the 2nd,please help, Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is left-handed. (Give your answers correct ...

### us history

which answer best explains the contributions of women during the revolutionary war? a) women were in charge of the horses and artillery during the revolutionary war. b) women often poisoned British troops stationed in their towns during the revolutionary war. c) women served ...

### trig

If sin = 4/5 with A in QII, and sin B = -3/5 with B in QIV find cos(A-B)

### trig

Graph the following from X = 0 to x = 2 pi 2cos 6x cos4x + 2 sin 6x sin 4x

### trig

Prove the identity sin(3 pi /2 + x) + sin(3pi/2 -x) = -2cosx

### trig

If an angle is pie radians, what is the arc length in radians?

### trig

if a and b are acute angels and sin(a+b)=1,sin(a-b)=1/2 then prove that (1)tan(a+2b)=-(3)1/2

### trig

trying to find lowest term: cos^2 è-1/4 cos è -1

### trig

How do I solve this? If cos x= 3/5, find the exact value of cos 2x

### trig

csc(x)=3 and pi/2 less than (x) less than 3pi/2, find cot(x).

### trig

Prove: 1-sinx/1+sinx=sec*2x-2secxtanx+tan*2x

### trig

verify the identity: sin(x+y)-sin(x-y)=2cosx siny

### trig

HOW DO YOU SOLVE THIS PROBLEM, sin theta>0,cos theta>0

### Trig

Solve for 0<x<2pi ---> (2radical2)cos^2(x)-(radical2-2)cos(x)-1=0

### trig

if sin theta = 2/3 in quadrant 1, find sec theta. HELP!!!

### Trig

find (s+t) given that cos s=1/3 with s in quad I and sin T=-1/2 with t in quad IV

### trig

covert polar equation r = 6/(2-3sinè) to rectangular equation

### trig

Evaluate the expression cos 22 degrees and sec 22 degrees

### trig

If 2tanA+cot A=tan B, then prove that 2tan(B-A)=cot A

### trig

if cot 17 degrees = 3.2709, find tan 73 degrees

### trig

if x=4 tan theta, express cos(2 theta) as a function of x

### Trig

Eight Fundamental Identities Sec thada - Cos thada How do I do this?

### Trig

IfA=340°, prove that 2cosA/2 = -(v1+sinA) - (v1-sinA)

### trig

How to get 5degree without using calculator using identities?

### Trig

tan(θ) = a (a ≠ 0), find cot(θ).

### trig

Prove 1+cos X/1-cos X = (csc X + cot X)squared

### trig

sin(x) = 8/17 and 90 degrees < x < 180 degrees then find cos2(x)

### trig

verify the identity algebraically- (5-5 cos x)(5+5 cos x)=25 (sin^x)

### trig

verify that 2/1+cos theta - tan squared (theta/2) = 1

### trig

prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1

### trig

prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1

### trig

If sin A= 1/4 and sin B= -1/2, with A in QII and B in QIV, find tan(A+B)

### trig

evaluate the expression tan (257pi/4) a.-1 b. -(sqrt2)/2 c. 1 d. (sqrt2)/2

### trig

explain how you will find the coordinate of P(14pi/3) if you knew the coordinate of P(pi/3)

### TRIG

Verify cos x/1+sinx + 1+ sinx/cosx = 2sec

### trig

Solve tan2A - 2tanA = -1 for 0º≤A≤360º.

### precalc/trig

olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1

### trig

sec0+ten0-1/tan0+sec0+1=1+sin0/cos0

### Trig

Find the reference angle θ'. θ= -7pi/9

### trig

choose the expression that is equivalent to the given expression. 2 cos^2 4x-1

### trig

Write the standard form of the equation where p=π and o=7π/12

### trig

solve the equation on the interval [0, 2pi]: tan^2 x - 3 tan x + 2 = 0

### Pre-Calc/Trig...

if h(x)=(fog)(x) and h(x)=3√x+3 find g(x) if f(x)= 3√x+2

### math ( CHECK MY WORK)

1. on 3 tests, a student scored a total of 258 points. if the student improved his performance on each test by 5 points, what was the score on each test a. 81,86,91 b. 80,85,90 c. 75,80,85 d. 70,75,80 is the correct answer A. 2. an item costs x dollars. the tax rate is 5% of ...

### PRE CALC HELP PLEASE

A plumber, electrician and painter were all hired to work on 3 different house. For Adam's house, a plumber worked a total of 35 hours, an electrician worked 42 hours and a painter needed 29 hrs to complete the job. the total cost of the three workers for adam's house was $2,...

### accounting

Bubba Production Company produces a homogenous product. All materials are added at the beginning of production and other product costs are added evenly over time until the product is complete. Conversion costs were 70% complete with respect to the 2,000 units in process July 1...

### Language Arts

1. Which of the following sentences has correct subject-verb agreement? A. A scarf or a hat keep you warm in the winter. B. Either Grandma or your brother pick your birthday gifts each year. C. Stacey and her sisters go to the beach every summer.** D. A dog or a cat are a good...

### physics

At the end of the semester, you are loading your gear into a van to go home. In loading the van, you can either lift a 45.0-kg crate straight up(method 1) or push it up a 3.00-m-long ramp that is inclined at an angle above the horizontal (method 2).In both methods, the crate ...

### English

which of the following is an example of a fragment? A) When Ted went to work, Bob went home. B) Although Ted went to work and Bob went home. C) Bob went to work although Ted went to work. D) Although Ted went to work, Bob went home. I Think the answer is B.

### Physics

1.when a train pulls a wagon, is the work zero because wagon pulls on the train with equal opposite force(newton's third law)? 2.what is negative net work and when it is done an on object, does it reduce objects kinetic energy? 3.if the work done on an object is zero, does ...

### Chemistry

balloon is filled with 1.35 atm dimethyl ether gas and 5.25 atm of oxygen gas at 27 C degrees. They react: C2H6O (g) + 3O2 (g) --> 2CO2 (g) + 3H2O(g) The system is allowed to cool back down to 27 degrees Celsius following the reaction. assuming external pressure is still ...

### Algebra 2

Can someone please check my answers? A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated card. 1.Not an ace. =12/13 2.A face card and a four. =4/13 3.A heart or a diamond. =1/2 4.A six or a seven. = 2/13 5.An ace and a spade...

### art

How does this art convey a message of time being lost? ( there is clocks everywhere in sand ? A. clocks randomly placed on the ground B numbers missing from the bills C. broken hourglasses D. melting clocks My best answer is A can you please check @Ms.Sue

### Chemistiy

Check if im right please. a. oxidation occurs at my anode ____ ** Voltaic Cell b. You can use standard reduction potential table to calculate how much voltage it takes to operate me____ **Both voltaic cell and electrolytic cell

### Anatomy and Physiology

Hello! Thanks for checking my question out! ____ 7. The bones of the extremities are parts of the (1 point) a) appendicular skeleton. b) axial skeleton. c) long bone group. d) medial skeleton. My Answer: A Could someone please check my answer? Thanks! - Da Fash

### math

this problem seems with too many numbers that i don't know where to start. or even how.I have to answer the problem on top not the one that says number 27. The problem: Geometry. For the floor plans given in exercise 27, determine whether the side through the points (2,3) and...

### Chemistry

24.5 ml of water are added to a 1.20 molar solution of nitric acid. If the concentration decreases to 0.55 molar, what volume of the concentrated solution was used? 1.20 M x mL = (24.5 mL + mL) x 0.55 M Solve for mL. Check my thinking. When you finish the calculation, check it...

### physics

At the end of the semester, you are loading your gear into a van to go home. In loading the van, you can either lift a 45.0-kg crate straight up(method 1) or push it up a 3.00-m-long ramp that is inclined at an angle above the horizontal (method 2).In both methods, the crate ...

### PHYSICS

If it takes 4.12 J of work to stretch a Hooke's law spring 12.1 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm.

### science

For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules? would i divide 2000/.80? which gives me 2500?

### math

Mr Ahmad starts work at 11.40 on Tuesday.He works for 12h45min.When does Mr Ahmad finish his work?Express your answer usering the 24-hour clock

### Physics (2)

If it takes 4.00 J of work to stretch a Hooke's Law spring 10.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm

### phyics

during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?

### physics

during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?

### Physics

If the gas in a container absorbs 203 J of heat, has 100 J of work done on it, then does 59 J of work, what is the increase in the internal energy of the gas? Answer in units of J

### Physics

A mechanical device requires 420 J of work to do 230 J of work in lifting a crate. What is the efficiency of the device? I keep getting 0.5% am I right?

### pre - CALCULUS

Find the reference angle for the given angle. Show your work. -404° my answer is 44 degree , But i don't know how to put my work together..

### Science-y Math-y Stuff

A machine with 80% efficiency does 4,000 J of work. Using the machine how much work did you do? NEED HELP! PLZ REPLY SOON

### Physics

I have no idea on how to do either part of these questions please help (part 1 of 2) To move a refrigerator of mass 110 kg into a house, a mover puts it on a dolly and covers the steps leading into the house with a wooden plank acting as a ramp. The plank is 8.8 m long and ...

### Math - Algebra 2

A chemical compound evaporates in a predictable way. In the first hour 1/2 of the amoun in the jar at the beginning of the hour evaporates. In the second hour 1/3 of the amount in the jar at the beginning of the second hour evaporates. In the third hour 1/4 of the amount in ...

### english

i need help with a thesis statement by a careful study of the work, the author, and of the time period in which the work was written, show how, in terms of genre, style, and vision, the writer holds up a mirror to his or her age.

### physics

A crane uses a block and tackle to life a 25 kN boulder to a height of 26 m. a. how much work is done on the stone? put your answer in scientific notation. b. if the work is done in 15s, what is the power output in watts and in horsepower?

### English - The Red Badge of Courage

1.Why did the youth enlist? (1 point) He was eager to join the war.***** He was drafted. He wanted to avenge the death of his friend. 2. From what point of view is the story told? (1 point) first-person point of view third-person limited point of view***** third-person ...

### French

Can someone please check my work? I have to write 15 sentences. 8 present tense and 7 past tense (passé composé) **1. J'ai apporté un nouveau le livre. 2. Le garçon est très amusant. **3. Ils sont allé a la bibliotheque après l'école. 4. La fille a seize ans. 5. Keri ...

### mathematics

Need help with this math problem please. Work need to be show but I have no idea how to complete the problem. (-4)3 (the 3 is an exponent) Thanks for your help

### mat115

Please help with this math problem. The directions are Add. Must show work. 4 2/7 + 1 5/7 I appreciate your help with this math problem. Thanks so much.

### algebra

find the L.C.D of each of the following and groups of fractions and then express the fractions of each group in terms of the L.C.D of that group... please show work 1\2,3\4,11\16 2\3,1\8,5\12

### algebra1

Find to consecutive integers that the sum of 3 times the first integer and 6 times the second integer is 24. Define the variabls you use. If somebody can show me how to work this out, I will be very greatful for the help? consecutive integers, n, n+1 3n + 6(n+1)=24 You need to...

### dog behavior

please check my answer thanks for your help :) During extinction, an instrumenatl behavior may initially increase as the result of what ? A failure of the dog to obey the new instruction B. an extinction burst C. temorary defiance D. punishment resistance I said A

### Math, please check answer

Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of the stated event. A face card or a 5 is drawn. So there are 12 face cards. Plus 5. So that is 13 options out of 52?

### Chemistry (check formula please)

how much energy (in kJ) is required to change the temp of 1.00 kg of Fe from 25.0 degrees celsius to 1515 degrees celsius? the specific heat capacity of iron is 0.449 J/g*K. this is the answer i got. q=(.449)(1.00)(1490)= 669.01 kJ

### business math- check my answers please

A share of perpetual preferred stock pays an annual dividend of $6 per share. If the investors require a 12% rate of return, what should be the price of this preferred stock? a. $57.25, b. $50.00, c. $62.38, $46.75, e. $41.64. I chose b. $50 because $50 x 12% = $6...is this ...

### geography

Can you check my answers please? 1. Which country has the largest land area in the world? The U.S.A. 2. Which ocean is larger, the Arctic or the Indian? The Indian Ocean 3. Beijing is to China as Washington D.C. is to the Inited States. We had to fill in Beijing if I am right!

### Please check my answers

Patient motion may create artifact that looks like an atrial arrhythmia? True or False. True The ECG tracing represents a 3 dimensional view of the heart's electric activity? True or False. True

### Sorry- Chemistry / Ionic Bonding

Hello My exams are coming I'm a straight A student .. the problem however is : My textbooks , teacher and every piece of work that he gives us is complicated can someone explain me how Ionic Bonding works . Please I really beg you... I need your help! My teacher sucks in ...

### chemistry

consider the reaction 2HgCl2 + C2O4-2 ---> 2Cl2-1 + 2CO2 + Hg2Cl2 The initial rate of this reaction was determined for several concentrations of HgCl2 and C2O4-2 and the following rate data was obtained. TRIAL (1) [HgCl2](M)= .105 [C2O4-2](M)= .15 RATE= 1.8 x 10^-5 TRIAL (2...

### physics

When a force acts on an object from an angle other than either 0° or 180° to the direction of motion: 1) The force is perpendicular to the direction of motion, so no work gets done. 2) The parallel and perpendicular component of the force both do work. 3) The perpendicular ...

### Physics

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...

### Algebra II/Trig

solve each inequality: 1-2t>-5 and the answer is: t<3 because you subtract one form both sides and get -2t>-6 and that's really positive and divide by 2 and that's where the three comes from ... but why does the > symbol change to < ?!

### trig

Use substitution to determine whether the given x-value is a solution of the equation: sin x = -2sqrt3/3, x=4pi/3 A) Yes B) No C) More information is needed D) The problem is indeterminate

### trig

Use substitution to determine whether the given x-value is a solution of the equation: sinx = -3sqrt/2, x=4pi/3 A) Yes B) No C) More information is needed D) The problem is indeterminate

### trig

how do i evaluate using formulas? i did almost the entire thing, but i can't finish the problem because i don't know how to simplify it: tan(-5/12pi) i can get until this part: = (-6pi/24)+(4pi/24) / 1-(-2pi/24)