90,377 results, page 53

1. trig

use a half angle formula to find the exact value of cos 75 degree
2. trig

A sine wave function f(x) = a sin(bx) has amplitude 10 and period 40. What are the values of a and b? (A) a = 10 and b = 20/pi ( B) a = 10 and b = 1/40 (C) a = 10 and b = pi/20 (D) a = 10 and b = 40 E) None of the above.
3. Trig

Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
4. Algebra 2 / Trig

Given cos X = -0.147, find two possible values for X that are not co-terminal.
5. Trig

find cos x/2, sin x = 1/4, 360 < x < 450, use half-angle identity
6. trig

find the exact zeros of the function in the interval [0, 2π) 2 cot squared x + 3 csc x=0
7. Trig

Find the amplitude, period, and phase shift of the following function: y=-2cos2(θ+45)
8. Trig

A car is traveling at a speed of 55 mph with a bearing of 210°. What vector represents the velocity?
9. trig

find a value of interval in degrees cotalpha=1.3692847 alpha=0.023903 is that correct?
10. trig

Solve sin ¥è = -0.204 for 90¨¬ < ¥è < 270¨¬. Give your answer to the nearest tenth of a degree.
11. trig

evaluate the expression below at t=4 p=\$400 and r=-9% round youre answer 2 decimal place
12. trig

Find the exact value by using a half-angle identity. cos 22.5 degrees
13. Trig

Find the exact value of tan 5pi/12 using the half-angle identity.
14. trig

write equations expressing: 19cos(theta-50degrees) as a sum of sine and cosine.
15. trig

write an equation expressing 19cos(theta-50degrees) as a sum of sine and cosine.
16. trig

if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=
17. TRIG HELP ASAP

I need help trying to find the major and minor axis on this problem: x^2+3y^2-6x+24y+6=0
18. trig

The minute hand of a clock is 6 inches long. What distance does its tip move in 16 minutes?
19. trig e-maths

giving that cosx=4/5 and siny=12/13, find cos(x+y) when x is acute and y is obtuse angle
20. Trig-desperate

f(x)=sin2x and g(x)=1/2tanx for x is the element of [-90;180] 8.1)calculate the x-coordinates of the points of intersection of f and g.
21. Trig

How do you find the exact circular function value of csc(-23pi/6)? I don't know how to do the pi symbol on the keyboard.
22. trig

a voltmeter's pointer is 3 cm in length. find the degrees through which is rotates when it moves 1.1 cm on the scale?
23. Trig

There is an airplane at an altitude of 12000 ft. The angle of depression is 1 degree. How far on the ground is the plane.
24. trig

Use an addition or subtraction formula to simplify the expression: tan(2−u)=cot(f(u)).
25. TRIG

show that cos(pi x) = pi cosx is not an identity by finding a single value of x for which it fails to hold.
26. math

(-3/5, 2) is a point on the terminal side of theta, find the value of the six trig functions
27. trig

the mini tent of the clock is 5 cm long.how far is the tip of THE HAND TRAVEL IN 35 MINS.
28. Math-Trig

Find all angles in degrees that satisfy each equation. tan(a)+rad3=0
29. trig

Solve exactly over the indicated interval: 2sinx+cscx=3, 0<theta<360
30. math trig

If a ferris wheel has a radius of 20.5meters, how tall would a 45 degree angle be?
31. trig

for the given angle, name the quadrant in whihc the terminal side lies. -350deg
32. trig

Find all real numbers in [0, 2π) that satisfy the equation. cos 2x = √(2)/2
33. trig

Find all values of ¸ in [0°, 360°) that satisfy the equation. 2 sin 2θ - √(3) = 0
34. Math - Trig

Explain why we cannot solve an oblique triangle with the Law of Sines given SAS.
35. trig

If \$5000 is invested at a rate of 3% interest compounded quarterly, what is the value of the investment in 5 years?
36. Trig

given that sinx=3/4 and cosy=-5/13 and both x and y are in quadrant II, find the exact value of cos(x-y)
37. Inverse Trig

How do I simplify arcsin (sin 6 pi) given the interval 0 ≤ theta < 2pi
38. trig

Given that cos A = 5/13 and A and B are both acute angles, calculate the value of Sin2A and Cos2A
39. Pre-Calc/Trig...

am i correct? What is the axis of symmetry for the graph of y=2x^2-4x+2? x=? the line goes through 1? x=1
40. trig

Find all angles è between 0° and 180° satisfying the given equation. cos è = 1/9
41. calc/trig

A 84-ft tree casts a shadow that is 130 ft long. What is the angle of elevation of the sun?
42. Pre-Calc/Trig

Describe the end behavior for function by writing a limit expression. f(x)=2x^5-x+7
43. trig

prove that the equation 2sin x cos x +4cos^2 x =1 may be written in the form of tan^2 x -2tan x -3=0
44. Pre-Calc/Trig

write an equation of the conic section: a hyperbola with vertices (0,-6) and (0,6) and asymptotes y=(3/4)x and y=(-3/4)x
45. trig

find the exact value of each expression. do not use a calculator. Sec 3.14/4 + 2 csc 3.14/3 4 + tan 2*3.14/3
46. Purdue Trig

A spherical balloon is being inflated so that radius is increasing at a rate of 10 mm/sec.
47. trig

half angle formula to find exact value cos 112.5 degree
48. MAth Trig

Find the diameter of a circle with an arc length of 32 cm and a subtended angle of 72 degrees
49. Trig

Find the approximate value of cot θ​, given that csc θequals=3.5891420 and θ is in quadrant I.
50. Trig

In which quadrant would the image of point (5,-3) fall after a dilation using a factor of -3?
51. Physics

Help how to find work If a worker pulls a 10kg bucket up a 25 m well, how much work has he or she done?
52. science

How much work is done on a 30 N rock that is lifted 1.5 m off the ground? show work.
53. Life orientation

Work ethics,4 actions to deal with unethical behavior at work
54. work ethics

it is ethical to take office supplies from work for home use ?
55. Math

Please check my answer thanks :) When repaing an installment loan of \$3,500 with 20 equal monthly payments of \$196 each , the apr of the loan is my answer is 13.5 %
56. anna

There is a right triangle. the legs are x and y and the hypotenuse is 120. the angle opposite x is 58. please check my answer. x= 120 y=64 because: SIN58= x/120 COS58=y/120

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees.
58. Science-PsyDAG

PsyDAG, could you please check my post on that science experiment thing, if you have time. I posted it yesterday on here, but you were never on. Thanks:-)

Can you please check my answer? Selena received \$42 commission for selling a computer for \$1400. What percent is her commission? my answer: 3%

Determine whether on not the following limit exists. If, so compute the limit. lim x->3 of sqrtx - 4 / x^3 +27 sqrt 3 - 4 / x^3 + 27 = sqrt 3 -4 / 54 Is this correct?

For the ellipse (x-2)^2/49 + (y+1)^2/25=1 List center: (2,-1) the foci: -(sqrt 74) AND +(SQRT 74,0) Major axis: x=2 Minor axis: y= -1 Vertices: (7,0) (-7,0) (0,5) (0,-5) Is this correct?

CaCl2(aq)+Na3PO4(aq) -----------> Ca3(PO4)2(s) +NaCl(aq)4) If the “H” for this reaction is -45.5 kJ/mol, is the reaction endo- or exothermic? Exothermic
63. science

Please check these! Physical or Chemical properties? 1. solubility = physical 2. melting point = physical 3. reacts with water to form a gas = physical

10. In a research proposal, your sources should not have the potential to answer research questions. A.) true *B.) false Thank You

if the sides of a cube are measured with an error of 2% use differentials to estimate the relative error in the volume df= 3x^2 * dx df= 3x^2 * 1/50 df= 3/50*x^2 is this right?
66. Algebra 1--Step-by-Step

Can someone show me how to solve these step-by-step? Please? Thank you. Factor each polynomial by grouping. Check your answer. 1. 2r^2 - 6r + 12 - 4r 2. 14q^2 - 21q + 6 - 4q 3. w^3 -4w^2 + w - 4 4. 2p^3 - 6p^2 + 15 - 5p
67. @JoJay12

I deleted your umpteen questions because you included no answers. If you want help on a few, please post no more than five questions along with your answers. We'll check them for you.
68. Calculus

Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six subintervals, taking the sample points, xi, to be the right endpoint of each interval and please explain, using a graph of f(x), what the Riemann sum represents. My cousin needs help with her ...
69. Social Studies

1:What fundamental problem did noah Webster see in the Articles of Confederation? > that states would always work in their own self-interest even if it meant harm to the nation as whole > that the central covernment would always favor large states over the smaller states...
70. Social Studies

1:What fundamental problem did noah Webster see in the Articles of Confederation? > that states would always work in their own self-interest even if it meant harm to the nation as whole > that the central covernment would always favor large states over the smaller states...

Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus hermanos se llaman ...
72. chemistry-check my work

for each of the following pairs, determine which acid is the stronger acid. A. H2S, HS- B. H2SO3, H2SeO3 C. HBr, H2Se D. HIO4, HIO3 E. H2S, H2O a. H2S b. H2SO3 c. HBr d. HIO3 e. H2S
73. English

Can you please check these other sentences I'm not sure of? Thank you. 1) After visiting the Roman findings (better ruins/remains) in Aquileia, we had a "free lunch". (we were free for lunch, we were free to have lunch where we wanted, our teachers gave us some free time for ...
74. Algebra

1. (2x-6)/(21) divided by (5x-15)/(12) 2. Solve (x)/(x-9)-4=(9)/(x-9)..I got -6, is that correct? 3. Add. Express your answer in simplest form...(4)/(s)+(6)/(s^2).. 4. Add. Express your answer in simplest form...(x^2)/(x+4)+(8x+16)/(x+4) Lets check you number 2) -6/(-15) - 4= ...

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...
77. previous post

has anyone read my 4 previous posts? I really need someone to check my answers. Please be patient, Erin. Our advanced math teachers are not online right now, it seems. =)
78. Law

Please check my answer thanks :) A pre trial conference most likley would occur before dicovery begins but after the complaint is filed True or False I said True
79. Health care

Please check my answer thank you :) What is based on per-person premiums or membership fees ? 1. Capitation 2. Fee-for service 3. Medical savings account 4. Retrospective payment system My answer is # 1
80. Health/Specialty Exams and Advance Techniques

please check the answer to this question thanks True or False The external auditory canal contains hair and wax-producing glands I said True
81. Dogs Hunting Training

Please check my answer thank you very much for all of your help :) Which of the following is not a trained ability ? A. Range B. Pattern C. Gun response D. Reponse to wind and scenting condititions My answer is C
82. Math

can someone please check my answers simplest form evaluate 2/3+3/5-5/7= 58/105 6. 3/7*24/25 divide by 6/7= 12/25 8.find GCF 432,360,288=72 9. 1050,9360,330=30 11. find LCM 14,75,78=13,650

I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2 - 36x + ? + 4y^2 + 8y + ? = -31 + ? + ? Then I factored the 9 and 4. 9(x^2-4x+4) + 4(x^2+2x+1) = -31+36+4 9(x-2)^2 + 4(x-1)^2 = 9...

A card is drawn at random from an ordinary deck of playing cards. Find the following odds: Odds against drawing a king, queen, jack, or ace Would this not be 16/52=4/13
85. Writing

Can you please check my citation? I'm trying to find out if it's correct. "How Deforestation Affects Us." Edu.udym. 11 Aug. 2008.web. 23 Oct. 2010. <url> (I'd put the url if jishka would let me)

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given I chose 2 as the answer. Is this correct?
87. government

This one im for sure is A but i just want to check and make sure help please. Why did early groups of people form governments? A. to help them survive B. to preserve democracy C. to provide leadership opportunities D. to encourage the arts
88. English

Be quiet. Listen to me. Emily, calm down. You are so noisy. Stand up and go to the back. You should remain at the back for the rest of the class. Got it? (Would you check the sentences? Correct errors, please.)

I think its decades Jill enjoys reading about American history, especially the last 40 years, or four _____________, of the nineteenth century. A. centuries B. millennia C. decades D. eras

91. Chemistry Help - Check Please

1) Describe 4 processes/forces that can explain all mechanism in Organic Chemistry? My answers: a) Electron Delocalization b) Hydrogen Bonding c) Aromacity d) Nucleophilic Substitution (SN1 & SN2) Thank you!
92. German

Can someone please check my German? _____ du die Fragen? A.Beantwortest B.Fragtest <<< C.Weiß D.Lest Wir lernen über Computers in ___. A. Sozialkunde B. Englisch C. Informatik <<<< D. Integralrechnung
93. English

Please check this! The diction of "at the tourist centre in boston" can best be described as.. A. Emotionally charged B. Colloquial and relying on slang C. Informal and simple D. Mostly figurative I don't think it's C or D? My best guess is A.
94. Science

Which of the following illustrates how fossil fuels can be conserved? A.) driving more frequently B.) developing more coal-burning power plants. * C.) reducing electrical use Can someone check this please?
95. Science

Which is an example of velocity? A. A pickup driving 30 km in 20 minutes. B. A car slowing down on a sharp curve. C. An airplane traveling 450 km/h. D. An 18 wheeler driving west at 50 km/h.*** I think the answer is D, but please check. Thank you!
96. Spanish

Could you please check these -thank you 1.How do you say I am going to wake up early I think it is "Yo me voy a despertar temprano" 2. What is another way of saying "Voy a secarme el pelo. Is it "Me voy a secar el pello.
97. Foreign languages

Can you check these sentences, Writaecher? 1) Can you please tell me how far ...... hotel is from the beach? 2) As a matter of fact, I was looking for a hotel on a seafront. Do you think I should opt for the ..... Hotel?
98. math/algebra

divide: x^2 + 2x -15/4x^2 divided by x^2-25/2x-10 answer choices a) x-3/2x^2 b) x + 3/2x^2 c) 2x^2/x + 3 d) 2x^2/x - 3 any your work is? any your work is? (x-3)(x+5)/4x^2 * 2x-1/x^2-25= x-3/2x^2
99. English Defn

Does work work refer to the type of paid employment? Yes or no?
100. English

Literature: Explain how the historical context of a work can impact that work?