# Trig check my work please?

90,505 results, page 73

1. ### trig

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

covert polar equation r = 6/(2-3sinè) to rectangular equation
4. ### trig

Evaluate the expression cos 22 degrees and sec 22 degrees
5. ### trig

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

if cot 17 degrees = 3.2709, find tan 73 degrees
7. ### trig

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

Eight Fundamental Identities Sec thada - Cos thada How do I do this?
9. ### Trig

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

How to get 5degree without using calculator using identities?
11. ### Trig

tan(θ) = a (a ≠ 0), find cot(θ).
12. ### trig

Prove 1+cos X/1-cos X = (csc X + cot X)squared
13. ### trig

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

verify the identity algebraically- (5-5 cos x)(5+5 cos x)=25 (sin^x)
15. ### trig

verify that 2/1+cos theta - tan squared (theta/2) = 1
16. ### trig

prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
17. ### trig

prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
18. ### trig

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

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

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

Verify cos x/1+sinx + 1+ sinx/cosx = 2sec
22. ### trig

Solve tan2A - 2tanA = -1 for 0º≤A≤360º.
23. ### precalc/trig

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

sec0+ten0-1/tan0+sec0+1=1+sin0/cos0
25. ### Trig

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

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

Write the standard form of the equation where p=π and o=7π/12
28. ### trig

solve the equation on the interval [0, 2pi]: tan^2 x - 3 tan x + 2 = 0
29. ### Pre-Calc/Trig...

if h(x)=(fog)(x) and h(x)=3√x+3 find g(x) if f(x)= 3√x+2
30. ### Spanish #2 (URGENT)

Can someone check my work? Create a sport skit/presentation using commands and actions. Escuchanos! Vamos a enseñar cómo jugar al futbol. Pon en los zapatos de fútbol. Trae un balón de fútbol. Va al campo. Golfea el balon con el pie. Corre al balon y golfea de nuevo. ...
31. ### math help

could some one please explain to me reciprocal how to find the reciprocal my math home work says find the reciprocal of (-1/8)(13/2)(4) reciprocal you change over so is the -1/8 -8/1 or would it be 8/1 13/2 would be 2/13 4 would be 4/1 then 1/4 then i would multiply all ...
32. ### English

(mean,means)Fluoridated water.........fewer Americans are toothless today. (visit,visits)Grandparents and children alike..........their dentist for regular check ups. (love,loves)Dentists.......the fact that there is more awareness about dental hygeiene. (is,are)Despite the ...
33. ### English

1. Don't ask for directions. 2. Don't ask for direction. (Are both grammatical? Which one is correct?) 3. That's the foundation of the success of our work. 4. That's the foundation of the success for our work. (Are both grammatical? Do we have to use 'of' or 'for' before 'our ...
34. ### math

at a certain factory each worker either drives to work or take the bus. the ratio of worker who take the bus to those who drive to work is 2:5. if 120 worker drive to work how many workers are there at the factory?
35. ### Global

made peace with PLO; shot by fellow Jew? who was that Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online right now, be sure to ...
36. ### 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 ...
37. ### English

Could you please check these sentences on illnesses, please? Thank you in advance. 1)I’ve got backache as a consequence of my slipped (herniated?) disc. I need to express this when I’m at the chemist’s or at the doctor’s. I need also to express that I need cortisone as...
38. ### math,correction

simplify: 7sqrt(7x) + 5 sqrt (7x) My work: (7+5)sqrt (7x) My answer: 12sqrt (7x) is this correct? It looks fine. Good work. Thanks for asking.
39. ### Physics

If it requires 7.0 of work to stretch a particular spring by 2.1 from its equilibrium length, how much more work will be required to stretch it an additional 3.7?
40. ### Physics

What force does work on a ball rotating down an inclined plane? Explain why the other forces the ball experiences do not do work.
41. ### physics

If it requires 5.5 J of work to stretch a particular spring by 2.0 cm from its equilibrium length, how much more work will be required to stretch it an additional 4.1 cm?
42. ### College Physics

It takes 164 kJ of work to accelerate a car from 23.7 m/s to 27.8 m/s. What is the car's mass? I tried using this equation but it didn't work KE = 1/2mv^2
43. ### Math

Jenifer works in a flower shop. On Saturday she started work at 8:45 a.m. She finsihed at 4:15 p.m. How many hours did Jenifer work after noon?
44. ### science

a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished?
45. ### science

a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished?
46. ### math

Jennifer works in a flower shop. On Saturday she started work at 8:45 a.m. She finished at 4:15 p.m. How many hours did Jennifer work after noon?
47. ### Math

Tiffany’s pay varies directly with the number of hours that she works. If she earned \$77.28 for 4 h of work, how much will she earn for 15 hours of work
48. ### physics - work

Imagine you find a 2 kg book on the floor and lift it 0.75 meters and put it on a table. find the work done ?
49. ### physics

what is the efficiency of a pulley that requires a worker to do 250 J of work to lift an object that requires 170 J of work

How do I show work for Si + Cl ?? The answer is SiCl with a little 4 down below the Cl. but I don't know how to show the work.
51. ### Maths - IQR

Hi! How do you work out the Inter Quartile range? WHats the name for xbar and how do you work this out? THanks
52. ### fluid power

a cyclinder must move a 2000lb load 2 ft. how much work must work in perform
53. ### math

'the accountant charged \$23 for the hour of work and \$23 for each for each hour after that . He earned a total of \$127. How many hours did he work'
54. ### Math

What is 50x50 and why pls show work (don't show adult work I'm in 6 grade I'm not going to understand lol)
55. ### AIG MATH

The weight of Meg's dog is 2 1/2 times more than that of her cat. If both animals weight 42 lbs, find the weight of each animal?Please show your work.
56. ### Gen Chem II

A gas-forming reaction produces 1.60 m3 of gas against a constant pressure of 127.0 kPa. Calculate the work done by the gas in joules. Please explain. Thanks!
57. ### algebra

simplify the following expression fully. I can't get some functions to work. Please read in the parenthesis. These are stacked. 1 + 1 (each 1 is underlined)) a b (a to b is underlined) a _ b (a and b is each underlined) b a (the minus sign is correct) Thanks
58. ### 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 ...
59. ### 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 ...
60. ### 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...
61. ### 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,...
62. ### 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...
63. ### 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...
64. ### 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 ...
65. ### 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...
66. ### 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
67. ### 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
68. ### 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
69. ### 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.
70. ### 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 ...
71. ### 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 ...
72. ### 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...
73. ### 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 ...
74. ### 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 ...
75. ### 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.
76. ### 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?
77. ### 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
78. ### 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
79. ### 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?
80. ### 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?
81. ### 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
82. ### 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?
83. ### 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..
84. ### 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
85. ### 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 < ?!
86. ### 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
87. ### 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
88. ### 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)
89. ### trig

in a circle of radius 26, find the length of the arc spanned by a central angle of pi/4 radians. round your answer to 2 decimal places. use 3.1416 as an approx for pi.
90. ### trig

Write cot(t) in terms of sin(t) if the terminal point determined by t is in the first quadrant. Do not leave a fraction inside a radical or use absolute value.
91. ### Math - Trig

A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? I just can't figure it out.
92. ### trig

Use a table of trigonometric values to find the angle è in the right triangle in the following problem. Round to the nearest degree, if necessary. cos è =0.9659 A=? H=20
93. ### trig

using a right triangle with one angle 24 degrees and the opposite side being 57 feet, write an expression to fine the hypotenuse, X? X=57/sin(24) is this correct?
94. ### Calculus

Find the positive value of x which satisfies x = 4.3cos(x). Give the answer to six places of accuracy. Remember to calculate the trig functions in radian mode
95. ### trig

Find all solutions of cos (x) + 1/2 sec (x) = -3/2 in the interval (2pi, 4pi) (Leave your answers in exact form and enter them as a comma-separated list.)
96. ### Math (Trig)

Convert the Cartesian coordinate (-1,2) to polar coordinates, 0≤θ<2π I know r is sqrt(5) but how would I find theta between 0 and 2pi? Thanks in advance!
97. ### 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 ...
98. ### 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 ...
99. ### 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 ...
100. ### 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