Trig check my work please?

90,377 results, page 95

  1. math

    Just want to double check please... Susie has two children, Mary and Jake. Given that Susie has Alzheimer’s and there’s a 25% chance that she passed the Alzheimer’s gene onto her offspring, what is the probability of BOTH Mary and Jake developing Alzheimer’s, based on ...
  2. how children learn(someone please check)

    What do constructivist educators believe about the learning process? A. Learning is a response to a stimulus. B. Learning is centered on the student and the student’s motivation. C. Learning is a process of building on what the student already knows. D. Learning is the ...
  3. Early Child Ed.

    Can you please check these to make sure my answers are correct? 1. An educator who uses stereotype-free learning materials qnd activities that allow both boys and girls to participate in the same physical play is promoting: 1. insensitivity to cultural differences 2. a biased ...
  4. chemistry

    Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10-pH or [H3O+] = antilog (- pH) and I got 1.00 x 10^7.3 for both concentrations is this correct? ABsolutely silly. You did not do the math. PUt this...
  5. Trig

    Find the exact value of: cos315. I have to use the sum angle formula cos(270+45) cos270 cos45 - sin270 sin45 thats all I have. Is the answer at least sqrt 2/2?
  6. trig

    I do not understand for my life how to solve this problem. Evaluate the expression without the aid of a calculator. arccos[(-3^1/2)/2) I'm not sure how my teacher did it. I know she said to find which quadrant that cos can be in and graph the triangle to find the angle.
  7. Trig

    How do you express sin4x as a trigonometric funcition of x using the identities? I think that you are supposed to start with the sine sum identity and then use the double angle identities for sin2A and cos2A, but after that I get stuck...
  8. trig

    An automobile windshield washer 10inches long rotates an angle of 60degrres. If the rubber part of the blade only covers the last 9inches of the wiped, find the area of the windshield cleaned by the wiper.
  9. trig/sig figs

    There are 60" in 1', 60' in 1°, and 2π radians in 360°. Convert arc-seconds into radians. KEep 6 significant figures. If someone could help and walk me through this process, it would be soooo appreciated!
  10. trig

    A frisbee is thrown within an angular velocity of 360 rpm. If the diameter of the frisbee is 12 inches, how fast does it travel when it hits the ground rolling on the side? round your answer to the nearest mph
  11. Geometry (trig part)

    How far apart would the top of the drawbridge be when both sides are open, if the angle of elevation of the drawbridge was 20°, to the nearest hundredth? (Extra info: distance inbetween is labeled "x")
  12. Trig

    Find all values of theta in the interval 0 <= theta < 360 that satisfy the equation 3cos(2theta)=7cos(theta). Express answers to the nearest ten minutes.
  13. trig

    The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex. Find the equation. (which I did) -- x^2 = 8y If the dish is 8 feet wide, how deep is it?
  14. Trig

    While fishing on a lake, the fisherman looks up at a cliff. His boat is 23 ft from the base of the cliff, and the angle of elevation is 40 degrees. Find the height of the cliff to the nearest tenth of a foot.
  15. Math

    Suppose that the function represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2002. Use this model to approximate the percentage of spam in the year 2006 to the nearest tenth of a percent. Please show work.. ...
  16. U.S.History

    Many immigrants who came to the United States expected to find streets paved with gold and easy opportunities to make their fortunes. can someone please give me a brief description of what they were more likely to find..and i will work on my essay from that description thanks ...
  17. Algebra 2 URGENT

    Solve the problem. Round answer to the nearest hundredth. Please Show All Work! Suppose a pool has dimensions 12 ft. by 30 ft. A sidewalk of uniform width around the pool has an area of 200 square feet. What is the width of the walkway?
  18. General Chemistry

    The work done when a gas is compressed in a cylinder like that shown in Figure 6.5 is 351 J. During this process, there is a heat transfer of 269 J from the gas to the surroundings. Calculate the energy change for this process. Not sure how to do this please explain with ...
  19. trigonometry

    Using exact values,find the value of: (A=30degrees) sin 2A + tan 3A/2 - cos A + sec(A+15), when A= 30degrees There were no parentheses and no exponents. please help by showing the work in details. Thank you! I pluged in the numbers and got this I don't know if its right or ...
  20. Math

    Hi I wanted some help with this question, I don't want the answer though as I want to try to see where my workings are going wrong. 3 x 34 / 9 - 2 (10 - 6) - 4 / 2 A -13 B 5 C 6 D -14 But I'm getting -3. Here's how I work through the equation using PEMDAS as a guide to order: ...
  21. Physics

    A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the man is initially 2.75 m above the level of the saddle. Please Show work!! I am completely lost!
  22. Physics

    A concave mirror is constructed so that a man at a distance of 19 cm from the mirror sees his image magnified 2.0 times. What is the radius of the curvature? OK so I have tried to work this out and can't seem to find the answer. Here is what I got. Please let me know if you ...
  23. Chemisty

    A student following the procedure described in this experiment collected the following data: Mass Mg,g 0.0243 volume of gas mL 25.5 barometric pressure, mm Hg 298 Calculate the value of the gas law constant, R. Please help me work this out, I have no idea. Thank you!
  24. Algebra II

    Find (f+g)(x),(f-g)(x),(f*g)(x), and (f/g)(x) for each f(x) and g(x) Now we were working well on this until we got to this f(x) and g(x). This was something our teacher didn't bring up. f(x) = 8x^2 g(x) = 1/x^2 How would you go about solving the problem with the fraction as g(...
  25. Literature

    PART A: What is Asimov's main idea in this essay? (Science an the sense of wonder) A- space is best appreciated through poetry B- poetry and science can work together****** C- the universe is more than beauty D- scientific knowledge is always advancing Help please!
  26. maths

    Starting with x0 = 0 (x0 has diagonal 0 that is smaller and towards the bottom) use the iteration formuala xn+1 = 4/ xn^2 +5 twice (for xn+1 the n+1 is smaller than x and diagonal towards the bottom also for xn^2 the n^2 is smaller than the x and diagonal towards the bottom of...
  27. English

    Could you please help me describe the pictures I posted you and check these sentences. 1) Go and fetch some chalk, will you? Open the window halfway to let some fresh air in. 2) You should hand in your dissertation by next Monday. Wipe off the blackboard. 3) If you enter the ...
  28. English

    Can someone check these questions, please? Thank you in advance In Shelley's Frankenstein, what are the traits that remind us of a Gothic novel? 2)Discuss the concepts of beauty and youth as portrayed by Lord Henry in chapter 2 of O. Wilde's The Picture of Dorian Gray. 3) ...
  29. History Check Please!

    2. Why were interstate highways initially built? A. to accommodate the increasing number of automobiles B. to make it easier for U.S. citizens to travel from state to state C. to enable the quick movement of troops in case of a nuclear attack D. to allow for faster speeds so ...
  30. English

    Add brackets or dashes and other punctuation so these sentences are correct. i did 1 by my own. can you check it for me please? 1. I have lots of animals - sheep, goats, horses and fish - that i have to feed everyday. 2. we will need to think carefully about what we take with ...
  31. Physics

    A 1.45 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.25 m/s , and at point B it has slowed to 1.34 m/s . Part A How much work was done on the book between A and B? Part B If -0.750 J of work is done on the book from B to C, how fast is it ...
  32. chemistry 2

    for the reaction 2C2H2(g)=>C6H6(l) at 25 C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K. calculate the standard free energy change at 25 C. show all work Help please!
  33. chemistry 2

    for the reaction 2C2H2(g)=>C6H6(l) at 25 C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K. calculate the standard free energy change at 25 C. show all work Help please!
  34. Physic

    The tension on a wire is 2640 N. The wire is 2.6 m long and the fundamental frequency is 330 Hz. What is the mass of the wire? (Answer: 2.33g) Answer is provided above. Please show all work on how to get the answer. Thank you!
  35. algebra

    please could you check my answers and fix them if needed? label each statement true or false . if false correct the underlined portion A. if 3 < x then this underlined 3 + y<x+y i put true B. if this underlined |w-7|< -3 then w - 7 > -3 or w - 7 < 3 I put true ...
  36. Trig

    Rewrite -25 degrees in radian form. -25 =-25(pi radians/180) =-25pi/180 radians =-5pi/36
  37. Trig

    Find the exact value of: sin60-cos60. do I just type sin60-cos60 in my calculator? = .37
  38. trig proof

    Help anyone? I need both sides to equal. -2sinxcosx/ 1-sinx-cosx = 1+sinx+cosx
  39. Grade 11 Algebra 2/Trig

    Given : f(x) = x^2 and g(x) = 2^x The inverse of g is a function, but the inverse of f is not a function. Explain why the statement is true.
  40. math 30 Trig

    A central angle subtends an arc of 35 cm. If the radius of the circle is 12 cm, what is the measure of the central angle?
  41. trig

    verify the identity (tanx+cotx) (1) __________ = ______________ (tanx-cotx) (sin^2x-cos^2x)
  42. trig

    Find the distance between d(P1,p2) between the points P1 and P2 P1= (-1,-5), P2 = (6, -6) and i also need help with this problem x 8 ____ - ____ x^2-64 64-x^2
  43. Math/Trig

    Solve: sin2 x = cos2 x for 0 degrees is less than or equal to x is less than 360 degrees.
  44. trig

    Multiply: 5(cos Pi/3 + i sin Pi/3)times 2 (cos Pi/4 + i sin Pi/4) and leave the answer in trigonometric notation.
  45. trig

    how high is a tree that casts a 30 ft shadow at the same time a 10 ft pole casts a shadow which is 10 ft long?
  46. trig

    what angle in degrees am i if the following is true: sin t > cos t if i were in quadrant three, sin t=cos t
  47. trig

    find an expression equivalent to sec theta sin theta cot theta csc theta
  48. trig

    Find the reference angle for each given angle: a) 325 degrees b) 14pi/3 c) -190 degrees
  49. trig

    City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
  50. trig

    City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
  51. trig

    City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
  52. Trig

    If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are picture cards.
  53. trig

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

    City A is 300kilometer due east of city B. city C is 200kilometer on a bearing of 123degree from city B.how far is it from C to A
  55. Trig

    Given ∆ABC. If side a is twice as long as side b, is <A necessarily twice as large as <B? Why?
  56. Trig

    What is the total number of solutions for the equation 3 tan^2 A + tan A – 2 = 0 in the interval. 0 ≤ A ≤ π?
  57. trig

    a plane is 50000 ft in the air and 30000 ft from an airport find the angle of depression from the plane to the airport
  58. Pre-Calc/Trig...

    Am i correct? The graph of y=3x^2-4x+2 opens downwards. FALSE The graph of y=2x^2-4x+2 has a y-intercept of (0,1). FALSE
  59. Trig

    A pendulum swinging through a central angle of Ts completes an arc of length 6.4 cm. What is the length of the pendulum?
  60. Trig

    rewrite in polar form x^2+y^2-6y-8=0 r^2=6r+6sin theta +8 r^2=6rsin theta +8 r^2=6r+6cos theta +8 r^2=6r cos theta +8
  61. trig

    solve log(x +9) - log x=3
  62. trig

    sec(sq) X - Sec(sq) X * Sin (sq) X = 1
  63. trig

    simplify cos(30+x)+cos(30-x)
  64. Trig

    cot (tan + cot) = ?
  65. Trig

    Solve Log[8](log[5]x)=0
  66. trig

    sin [sin -1 (7/25) - cos -1 (-8/17)]
  67. trig

    tan^2x/1 + tan^2x = sin ^2 x
  68. trig

    cot^2/1 + cot^2 = cos^2
  69. Trig/precalc

    Cos[x + (7 Pi)/4] + Cos[x - (7 Pi)/4] = 1
  70. Trig

    cos[(tan^-1(3/4))+(cos^-1(9/41))]
  71. Trig

    Tan^2= csc^2 tan^2 -1
  72. dog behavior

    Please check my answer thank you very much For optimal appetitive classical conditioning which of the following is not important. A The dog should be hungry B THe training enviorment should be relatively distraction free C. THe dog should be give the chane to "use the bathsoom...
  73. behavior problems (dogs)

    Please check my answer thanks The problem with "quick fix" corrections designed to eliminate one specific behavior is that the A. dog may not respond to the correction. B. dog may be frightened by the correction. C. owner may be unable to utilize the technique at home. D. ...
  74. Social Studies (Check, Please!) (Ms. Sue)

    What was the Doolittle Raid and why was it so important? A: The Doolittle Raid was the first air raid on Japan in 1942, during World War II. Among several selected targets was the Japanese capital, Tokyo. This raid was so important because it provided an instant boost to ...
  75. Trigonometic

    Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) What is the question? Solve for x? x= arcsin (4/5) put that in your calculator. Same for the next. For both cases I recognize the sides of well-...
  76. English

    Can you check these sentences for me, please? Thank you very much for your help. 1)Big Brother is a TV programme (or a reality show?) about people and relationships. 2) In particular, contestants have to stay in the same house for ten weeks. 3) They have to make their own food...
  77. 11th grade mths

    Please check urgently .I have to submit the assignment A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range equals [0,1] C.Give n ...
  78. math

    Each user has a password 6 characters long where each character is an uppercase letter, a lowercase letter, or a digit. Each password must contain at least one digit. How long will it take to check every possible character combination, if each check takes one unit of time.
  79. English

    1. Which line from the poem “Wave” best develops its tone? Wave My child (line 1) Born to me by water (line 2) And by water (line 3) Swept away. (line 4) (1 point) a) line one b) line two c) line four d) line three My Answer: B Could someone please check it?
  80. Social studies 8th grade

    What was described as the "hardest work" slaves did? A) work in the rice fields B) we're going to tobacco fields ** C) working the lumber business D) Work loading and unloading ships in port 2. Which of the following best describes the social class of the small farmer? A) ...
  81. Grammar (will you check the rest please)

    FIND THE ADVERBS 1. Pedro enthusiastically supported Zach's bid for student council president. ENTHUSIASTICALLY 2. Spend your money wisely. WISELY 3. Marissa waited quietly for the play to begin. QUIETLY 4. Lightly underline the words you want to emphasize. LIGHTLY 5. Now I ...
  82. math(check answers please)

    for questions 1-3,find the sum. 1.5 9/13 + 5 9/13= A.13/74 B.10 12/13 C.11 5/13(I PICKED THIS) D.13/142 --------------------------- 2.3 3/15 +4 2/5= A.2 1/2 B.22 4/5 C.7 3/5( I PICKED THIS) D.5/38 -------------------------- 3.3 4/9 + 2 1/3= A.5 1/3 B.18 3/5 C.5 7/9(I PICKED ...
  83. math

    The function f(x)is defined as f(x)={-2x+3: if -2 less than or equal to < 1 f(x)={5: if 1 less than or equal to x less than or equal to 2 f(x)={x^2+2: if x > 2 a. find f(0), f(2) and f(5) b. determine the domain of f(x) Please show work
  84. PLEASE HELP CHECK ANSWER SCIENCE

    5. Which of the following body systems does not rely on the autonomic nervous system to stimulate involuntary events? A. skeletal system B. digestive system C. circulatory system D. respiratory system My Answer skeletal systems
  85. English

    Please check my answer thanks :) IN which of the following sentences is the word run used as an action verb? 1. MArk competed in the five-mile run. 2. Sandy had a runny nose and a cough. 3. Adam runs every day at five o'clock. 4. Erica put Molly in the dog run before she went ...
  86. physics

    please check: Conductors can be charged by ___, while insulators cannot. a. grounding b. induction c. polarization d. contact D Which of the following is not true for both gravitational and electric forces? a. the inverse square distance law applies b. forces are proportional ...
  87. English

    Can you check the following sentences please? Can you say "This is your Christmas holiday homework". •Read and do the “test yourself” activity on the Plantagentes pag. 38-39 •Read and translate the opening of Chaucer’s Canterbury Tales pp. 46-47 •Read and summarize...
  88. Physics

    A satellite has an orbit with pedigree 175 km and apogee 181,200 km. What is the period of the orbit? >>I'm not sure what the associated equation is. I tried the problem using the average radius in the period equation but it didn't work. Please help!
  89. Math

    Describes a real world situation using words as label and using math symbols to relate the words.. Its a vocab work. And the school couldn't get me a text book today because my names not in the system. PLEASE help me:((
  90. Science Check

    Hi! Can someone check my answers? Thanks!! :) Question 1: A skateboarder (coasting with a constant velocity) jumps straight up. What happens she she lands? Does she come down.... A.) behind the skateboard B.) ahead of the skateboard C.) on the skateboard My answer: B. Question...
  91. 7th grade math (probability)

    Can you check these, please? Ten cards numbered 1 through 10 are mixed together and then one card is drawn. Find the probability of each event. Write each answer as a fraction, percent, and decimal. 14. P(less than 5) = 4/10 = 2/5 Ans: 2/5, 40%, 0.4 15. P(greater than 3) = 7/...
  92. English-Writing

    Many students fear the thought of college. It is not only the transition from high school that intimidates them, but large classrooms, two hour seminars, and worse part, the fear of failure is what keeps them from going. Hence either take shorter hours, gap years, or some even...
  93. S.S.

    Have any info on colonial voting what is qualla boundary men only! no women. Please check these sites: (Broken Link Removed) http://en.wikipedia.org/wiki/Qualla_Boundary
  94. Dr.Bob - about your post to a previous question

    For that question by Josh on the second page I reviewed what you did and am confused to how you found the g excess reagent (NH3) I posted a response to what I found when I helped Josh with the problem. Could you please take a look at it and check my thinking on the problem ...
  95. English

    Let's look at the two comparative sentences. When we compare the degrees of two things and people, we use comparative forms. 1. Emily is younger than Bob. 2. Bob is shorter than Emily. (Will you check all the sentences above? Correct errors, please. What is the part of speech ...
  96. health

    True or false the endocrine system only regulates long-term changes in the body True*** False Which endocrine glad(s) are responsible for the changes associated with puberty? A. thymus gland B. reproductive glands*** C. thyroid gland D. pancreas Please check
  97. Science - 1 Question

    A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!
  98. Physical Science

    A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!
  99. Science - 1 Question

    A small fish in the pacific ocean watches a shark swim by a large rock a few meters away. Which of the following is a reference point in this scenario? A. shark ** B. large rock C. water D. pacific ocean I think the answer is A, please check!
  100. Chemistry revision

    all these questions I got wrong on my homework today ...I'm trying to find out why and what the correct answers were .. please help How many grams of solute are required to make a 504 mL solution of copper (I) nitrate with a concentration of 1.3317 M? before I had help and was...
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