Trig check my work please?

42,218 results, page 57

  1. probability

    A company's records indicate that on any given day, 1% of their day shift employees and 2% of the night shift employees will miss work. Sixty percent of the employees work the day shift. a. What percent of employees are absent on any given day? b. A randomly selected employee ...
  2. Math (Check answer)

    Please check the solution below: X, is assumed to be a random variable by placing letters of the word “YACHT” in a hat. If these letters are withdrawn then it gets replaced. A value of 1 is given when a vowel is retrieved, and a value of 2 is given when a consonant is ...
  3. PLZ Check my Science Project's summary?!

    The following r the instructions to my Project: - Compose a scientific summary of your method, observations, data, and conclusions. In addition, be sure to answer the questions below in your report. 1. Why does the first method for determining volume work only for a regular-...
  4. PHYSICS

    Hooke's Law: 1.) If it takes 10 N to compress a spring 20cm, how much energy will be stored in the spring when it is stretched 50cm. ***Also, for ex: If I am doing work against a restoring force, say, doing work against gravity, what kind of force is the elastic force of a ...
  5. trig

    How can I get rid of the square roots in this fraction? sqrt((2-sqrt3))/sqrt((2+sqrt3)) the answer is 2-sqrt3 but I don't know how they arrive at it.
  6. trig

    A kite is flying overhead at an angle of elevation is 28. If the kite string is 10m long, what is the horizontal that the kite is flying away from you?
  7. Trig

    Given: sin x = 4/5, 0 < x < π/2 sin y = 5/13, π/2 < y < π Find the exact value of sin(x + y) I presume I'm supposed to use the sum and difference formulas but I'm not sure how to get the exactly value of cos x or cos y
  8. trig

    Suppose the tangent of an acute angle in a right triangle is less than 1. How does the side opposite the angle compare to the side adjacent to the angle?
  9. trig

    in proving trigonometric identities if 1 + sin^2 theta is equal to 2 sin^2 theta + cos^2 theta. what is the correct answer?
  10. trig

    If a=8, the angle C=50 degrees and the angle A=35 degrees find the other angle B and the remaining b and c sides. Give your answer to at least 3 decimal places.
  11. Trig

    Rewrite 9pi/5 radians in degree measure. 9pi/5 =9pi/5(180/pi radians) =1620/5 =324 degrees
  12. Trig

    Given that csc θ = -4 and tan θ > 0, find the exact value of a. x b. sin θ c. cos θ d. r e. sec θ f. cot θ
  13. trig

    Graph one complete cycle of y + cos x cos pi over6 + sin x sin pi/6 by first rewriting the right side in the form cos(A-B)
  14. trig

    The hypotenuse of a right triangle has length 8 and one of the other edges has length 3. What is the sine of the angle opposite the edge of length 3? (A) 3/p55 (B) 3/8 (C)p55/8 (D) 55/64 (E) None of the above.
  15. math trig

    a 3.8m ladder rests against a vertical wall and makes an angle of 38 degrees with the wall. how far does the ladder reach up the wall?
  16. Math - Int Trig

    Form a polynomial f(x) with real coefficients having the given degree and zeros 21) Degree: 4, zeroes: 2i and -3i 22) Degree: 3, Zeroes i and -10
  17. TRIG - BEARING PROB.

    A ship is travelling on a bearing of 345 degrees. Then it makes a 90 degree right turn. What is the ship's new bearing?
  18. chemistry

    A proposed mechanism for a reaction is: (i) A + B2 AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain why. (ii) is the rate...
  19. trig

    A tree growing on a hillside casts a 121-foot shadow straight down the hill. Find the height of the tree (in feet) if the slope of the hill is 8 degrees and the angle of elevation of the sun from the horizontal is 50degrees.
  20. Math Trig

    A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?
  21. Trig

    Hi, I would like to ask anyone available a quick question. How would I explain WHY it is that the data/function of average monthly temperatures for a location are a sinusoidal function? I am having trouble phrasing and explaining it, although I am aware that it is in fact ...
  22. Math/Trig

    An airplane leaves an airport and flies due west 150 miles and then 170 miles in the direction 210°50'. Assuming the Earth is flat, how far is the plane from the airport at this time (to the nearest mile)
  23. trig

    A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 4 mi apart, to be x = 27° and y = 53°, as shown in the figure. (Round your answers to two decimal places.) (a) Find the distance of the plane from point A. mi (b) Find the ...
  24. Trig

    Morana is trolling for salmon in Lak Ontario. She sets the fishing rod so its tip is 1 m above the water and the line enters the water at an angle of 45 degrees. Fish have been tracked at a depth of 45km. What length of line must she let out?
  25. SCIENCE

    How would you find latitude and longitude without using a globe or the internet? Please help If you are plotting long distances are varying courses, the best you could do is plot these on a Equidistant Projection, and the usual of these is the Miller Equidistant Projection. I ...
  26. English

    I just want you to check my word choice. There are a few sentences I rephrased I'm not sure of.(Sentences 2.3.4). I really hope you'll help me improve my writing skills. Thank you for your help. 1) His father was a German from Bremen, who first settled in Hull and then came to...
  27. Trigonometry

    What are these things called: -cos x = cos -x What are the rules to these trig rules? Thanks
  28. trig

    two poles of height 25 cm & 20 cm are are parallel to each other with a distance of 12 cm between them. what is the distance between the top of the two poles?
  29. trig

    GIVEN THE ANGEL ALFA WITH COS ALFA = -1/a. IF ALFA IN QUADRANT TWO, THE VALUE OF SIN ALFA IS....
  30. trig

    Please find sin (alpha/2) and cos (alpha/2) sec alpha = 3, -pi/2 < alpha < 0
  31. Calculus

    how do you solve this trig identity? i don't get it at all! cos(a+b)cos(a-b)=cos^2a-cos^2b-1
  32. Advanced Functions/Trig

    Prove the following: sin(x+y)sin(x-y) = cos^2 (y) - cos^2 (x)
  33. trig pre calc

    cos x (sec x +cos x csc2x)=csc2x
  34. trig

    is this right... a) give reference angle -200=20 degrees reference angle??
  35. Maths-trig

    Prov that 1-sin2X/sinX-cosX=sinX-cosX
  36. Trig

    In the equation y=4cos 6x, what does 6 represent? In general for the equation y-acosbx, what does b represent?
  37. trig

    prove that (sin^4x-cos^4x)/(sinx-cosx) = sinx+cosx
  38. Prove trig identity

    Prove the following trigonometric identity: (sec^2x-1)(csc^2x-1)=1
  39. trig

    prove that :cosA-sinA+1/cosA+sinA-1=cosecA+cotA
  40. trig

    suppose sin(x)=5/6, and x is in the first quadrant. Determine cos(x), sin(2x), and cos(2x).
  41. Trig

    Sin theta = 4/5 i got 53.1 as an answer but on my answer sheet is also has 126.9 How do i get that 126.9?
  42. Inverse Trig

    Using -pi/2 ≤ y ≤ pi/2, what are the following solutions? y=arcsin root3/2 y=arcsin 1/2
  43. Trig

    Verify the Identity (sin m +sin n)/ (cos m + cos n) = tan(m + n/2)
  44. trig

    Choose the expression that is equivalent to the given expression. sin 6x tan 3x I got 2 sin^2 3x
  45. senior year

    does anyone know what consumer math is? i'm trying to take it for my senior year, but i'm not sure what it's about. or if i can take it after trig and algebra.
  46. trig math

    Prove that tan(theta)tan(60+theta)=tan3theta
  47. trig

    if acos^3x+3acos.sin^2x=m asin3x+3acos^2x.sin=n proof that-(m+n)^2/3+(m-n)^2/3=2a^2/3
  48. Trig

    Verify the identity. 1/(tanx-secx) + 1/(tanx+secx) = -2tanx
  49. Trig

    Sin theta=8/17, theta in Quadrant I, Cos X=-sqrt5/5 in Quadrant II
  50. Art Appreciation

    Ruben and Rembrandt: Reflection and Temperament. Contrast The Elevation of the Cross by Rubens with Rembrandt’s Return of the Prodigal Son. Explain how each work reflects the artist and his temperament. How does each work mirror sociopolitical environment of each artist.
  51. physics work and newton

    A person of mass 84kg is at rest at the bottom of an inclined plane that makes an angle of 30 degrees with the horizontal. he walks up the inclined plane through a certain distance and has a speed of 0.40 m/s. How much net work has been accomplished in walking through that ...
  52. chemistry - 3.1.6

    At a high temperature, the equilibrium constant for the decomposition of hydrogen iodide is 65.0. If the initial concentration of HI is 1.60 M, what is the concentration of hydrogen at equilibrium? 2Hl(g) H2(g) + I2(g) A. 1.42 M B. 0.753 M C. 0.240 M D. 0.802 M I'm actually ...
  53. Physics

    A man drags a table 4.25 m across the floor, exerting a constant force of 54.0 N, directed 28.0° above the horizontal. I have found the work done by the applied force to be 202.6 J but I can't find the second part of the question which is below. (b) How much work is done by ...
  54. chemistry

    If a cetain pressure supports a 256 mm high column of mercury, how high a column of water will it support? The ensity of mercury is 13.6 g/mL. Not completely sure how to work this one, we never reviewed it in class. All the answers to chose from are in inches or ft. I'm coming...
  55. Physics

    i know this is alot to ask for but these 10 i can nott get out of the 30 A man pulls a 10-kg box across a smooth floor with a force of 71 newtons at an angle of 23 degrees and for a distance of 97 meters. How much work, to the nearest joule, does he do...
  56. curriculum

    Which of the following is an example of a project-approach activity for a preschool class? A. At 9:00 in the morning every day, half the children in the class do sorting and counting activities while the other half work on an art project. After 20 minutes, the groups switch. B...
  57. statistics/mean and standard deviation

    find the mean and standard deviation in the following probability distribution x 1 2 3 p(x) 0.2 0.6 0.2 *i think that the mean is 2 but am lost after that when it comes to the standard deviation. please show work and calculations. the more i work with numbers the more confused...
  58. physics - DAMON

    a +35x10^-6 C point charge is placed 32 cm from an identical +32x10^-6 C charge. how much work would be required to move a +50.0x10^-6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? so can you show me the work w/o the integrals...
  59. Science-Physics

    You push a 67 kg box across a floor where the coefficient of kinetic friction is uk = .55. The force you exert is horizontal. (a) How much power is needed to push the box at a speed of .50 m/s? (b) How much work do you do if you push the box for 35 s? *please list the steps to...
  60. algebra 2 help please/check

    The first 3 terms in a geometric sequence are 1.1, 1.65, and 2.475. Part A: What is the sum of the first 6 terms of the sequence? Show your work. Part B: How does the sum of the seriesy differ from the 6th term? Explain. Part C: If the nth term in this sequence represents the ...
  61. Science, please help!

    Please check my answer! Fill in the blank for below: Resources that cannot be replaced in the environment once they are used are _____. renewable resources compost nonrenewable resources I think the answer is nonrenewable resources.I might be incorrect, so please check! This ...
  62. thermal heat

    Consider the following. (a) Find the work done by an ideal gas as it expands from point A to point B along the path shown in the figure. MJ (b) How much work is done by the gas if it compressed from B to A along the same path? MJ
  63. english

    participal pharse: admired by many other artist,picasso work changed considerably overthe years. B) admired by many other artist. c)over the years d) picassos work .i think its c
  64. physics

    a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
  65. math

    Automobiles and small trucks account for 84% of the travel to and from work in the United States. What fraction represents all other means of travel to and from work in the United States?
  66. secend grad math

    if 3+x=6 what is x You can turn that around. Work it as a word family. 3 + ___ = 6 6 - 3 = ___ What do you think? ?? What number can be added to 3 to make 6? 3 + ? = 6? Sorry! I should have written "work it as a number family"!! =)
  67. Work

    A truck carrying a 57 kg crate accelerates uniformly from rest to 86.5 km/hr in 18.4 s. Calculate the work done on the crate by the truck (in J). I got 16454 J right. Now why is it positive? K-K = negative if Velocity from rest is 0.
  68. science

    Using the equation: work = force x distance tell me how much work is done when a boy applies 5 Newtons of force over a distance of 2 meters. A)10 Watts B)10 Joules C)10 Amps D)10 Newtons
  69. physics

    a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
  70. Algebra 2/ Trig

    Igor is flying a kite. he has let out 300 feet of kite string. the string makes an angle of 64 degrees with the level ground. To the nearest foot, how high is his kite?
  71. trig

    if sin23=p,write down the following in terms of P *cos113 *cos23 *sin46 so i draw the diagram an solve for x in terms of P an got 1-p so i don't know how to apply cos113and sin46 in terms of 23 or P but *cos 23 i wrote it as> 1-p/1 wch is 1-p
  72. trig

    Two men on the same side of a tall building notice the angle of elevation to the top of the building to be 30o and 60o respectively. If the height of the building is known to be h =120 m, find the distance (in meters) between the two men.
  73. math (trig)

    from the top of a bridge over the burlington canal, maria looks down at a sailboat at an angle of depression 15 degrees.the bridge is 18m above the water. calculate the horizontal distance from the bridge to the sailboat
  74. trig

    From a boat on the bay, the angle of elevation to the top of a cliff is 29°10’. If the bottom of the cliff is 1860 feet from the boat, how high is the cliff (to the nearest foot)? Assume that a right triangle is formed.
  75. trig

    Find two standard position primary angles in radians by solving for the unknown. "Primary angles" are those angles which exist between 0 and 2pi. As usual, use exact values in your calculations. cotx + 1 = 0
  76. Physics

    A 55-kg block, starting from rest, is pushed a distance of 5.0m across a floor by a horizontal force Fp whose magnitude is 140N. Fp is parallel to the displacement of the block. The final speed of the block is 2.35m/s. a. How much work was converted to thermal energy? What ...
  77. Chem/Physics

    1. How much work is necessary to accelerate a bullet having a mass of 5.0 g to a velocity of 1000. m/sec? This was on a chemistry problem set of mine, and it seems like a very physics-oriented question [I have not taken physics.] Could someone point me in the right direction ...
  78. Algebra 2

    Two woodworkers, Tom and Carlos, bring in $100 for making a table and $80 for making a chair. On average, Tom must work 3 hours and Carlos 2 hours to make a chair. Tom must work 2 hours and Carlos 6 hours to make a table. If neither wishes to work more than 42 hours per week, ...
  79. physics

    How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W
  80. Calculus

    Let f (x) = 5x^2 – 9 and g(x) = x – 3. (a) Find the composite function ( f o g)(x) and simplify. Show work. (b) Find ( f o g)(2) . Show work.
  81. math

    Number of days taken by 1 man to complete the same work is less than by number of days taken by 1 women to do this work?
  82. Math

    3. A can do a piece of work in 6 days. B is 50% more efficient. The number of days it take B to do work is A. 9 B. 3 C. 2 D. 4 Is the answer 4? If so, how did you get your answer?
  83. algebra

    Let f(x)= 2x^2 +7 and g(x)= x – 6. (a) Find the composite function (f*g)(x) and simplify. Show work. (b) Find ( f*g)(1). Show work.
  84. math

    10 men can do a piece of work in 10 days.how many days can 100 men take to do the same amount of work?
  85. history

    Im having trouble finding about the people of the indus valley, which was in acient india. I need to make up a person, that would have lived there. I need to make up the persons name a job that was acuarate to that time and place there age work or job rights and ...
  86. math

    Daniel needs to purchase 5.6 meters of tape for a project. If each roll of tape contains 80cm andcosts $2.50, what is the total cost of the tape Daniel must buy? x=cost of tape meters of tape/cost 5.6/x=.8/2.5 x=17.5 I have the cost is $17.50 Is this correct? They want us to ...
  87. Math "Need Help Asap"!

    19. WorkPad Note: In questions 19-21, remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. You can use the comments field to explain your work. Your teacher ...
  88. English

    Can you check if there's grammar mistakes in this monologue, if there is, can you correct it for me. Hi, I'm William Shakespeare. I had disappeared from the records for seven years. Many rumors flew around, including that I liked to poach. They say I had to leave Stratford ...
  89. English

    Can you please check if the following sentences are correct? Thank you very much in advance. 1)The first four sections correspond to the Greek classical elements of earth, air, fire and water. 2) The final fifth section is usually interpreted as referring to ether, the fifth ...
  90. L.A.

    Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you completed help you ...
  91. Physics

    The work done against a force F(r) in moving an object from r = r1 to r = r2 is integral F(r) dr limits R2 at top and r1 at bottom. The gravitational attraction between two masses m1 and m2 at distance d is given be F=GMM/d2, G = 6.67 x 10-11. Find the work done in lifting a ...
  92. English

    Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about The Giver. Provide an explanation for your choices. How did the role you selected and the work you completed help you to ...
  93. english-grammar

    I am writing an essay and am not sure If I should combine these two sentences with a semi colon or just leave them separate. Please help! (It may take...will be fruitful) I have found that nothing can be accomplished without hard work. It may take a large amount of persistence...
  94. language

    think about the work you completed in your reading role determine the ideas that would be most worthy to share in a literary discussion about walk to moons provide an explanation for your choices how did the role you selected and the work you completed help you to understand ...
  95. Statistics (Check Work)

    Can Someone help me with these 2 problems? I am certain I am solving them correctly, but for some reason the computer keeps marking my answers as incorrect. Question 1: Minnesota had the highest turnout rate of any state for the 2012 Presidential election. Political analysts ...
  96. Chemistry

    In a study of the following reaction at 1200K it was observed that when the equilibrium partial pressure of water vapor is 15.0 torr, the total pressure at equilibrium is 36.3 torr. 3Fe(s)+4H2O(g) (reversible arrows) Fe3O4(s)+4H2(g) Calculate the value of Kp for this reaction ...
  97. English

    Can you please check these sentences? I'm really doubtful about them. Thank you. 1) Look at the timetable on the departure board to see if your flight is delayed or if it is on time. 2) Then go to the check-in desk of the company you are travelling with. 3) I advise you to get...
  98. Physics Homework

    I have a few questions that I don't understand and would like to get checked, please? 5.If energy is conserved and momentum is conserved, would they both have to be conserved simultaneously in some interaction? My answer: No because each engergy and momemtum is being ...
  99. Social Studies

    Could you please check the definition that matches with the term. Here are the terms: free enterprise Economics trade-off economic models market econonmy total costs wants marginal benefit fixed costs rational choice Here are the definitions study of the production, ...
  100. Biology

    Animal cells can take up sucrose against its concentration gradient using a Na+/sucrose symporter. Indicate if the following statements are true or false. 1. In the Na+/sucrose symporter Na+ is also moving against its concentration gradient. False 2. For the symporter to work...
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