# Trig check my work please?

42,244 results, page 62
1. ## trig

simplify the expression sin(theta+pi/4) + sin(theta-pi/4)
2. ## trig

Prove that sin(A+B+C+)cos(B+C)-cos(A+B+C)sin(B+C)=sinA
3. ## trig

if sin a=4/5 and is quadrant 2 and sin b= 8/17 and is in quadrant 1, find cos (a-b)
4. ## trig

tan x = n tan y, sin x = m sin y then prove that m^2-/n^2-1 = cos^2x
5. ## Trig

Verify the identity. cos 4x + cos 2x = 2 - 2 sin^2(2x) - 2 sin^2 x

7. ## trig

cosx/1-tanx + sinx/1-cotx = sinx =cosx
8. ## trig

prove the identity: csc x-1/csc x+1 = cot^x/csc^x+2 csc x+1
9. ## Trig

Verify the identity: tanx/secx-1=secx+1/tanx
10. ## trig

what is the single term of csc^2 theta-1 over csc^2 theta
11. ## Math

Trig Identity Prove: cos(x+y)cos(x-y)=cos^2(x)+cos^2(y)-1
12. ## trig

express the product of radical 90 x radical 40 -radical 8 x radical simplifies to ?
13. ## trig

If 0 is less than or equal to 2theta less than or equal to pi and P(2theta)= (-7/25, 24/25), find P(theta)
14. ## trig

Find cos(A+B). cos A=1/3 and sin B=-1/2, with A in quadrant I and B in quadrant IV.
15. ## Trig

How would you show that sin(x+pi)=-sin x? I’m not sure how to start so if someone can tell me how to start it I should be able to do the rest.
16. ## Trig

Verify the following identity: 1-cosx/sinx=sinx/1+cosx
17. ## trig

(tanx+cotx)over(tanx-cotx)=(1) over sin^2x-cos^2x)
18. ## trig

simplify the expression: sin(theta+pi/4) + sin(theta-pi/4)
19. ## Trig

Complete the following statement. (1-sinθ)(1+sinθ)
20. ## trig

solve the equation 3 sin^2(theta) -sin(theta)-4=0
21. ## trig

Help with simplest form sin(2pift - pi) + sin(2pift + pi)
22. ## Math-trig.

1)sinx+cosx=1 2)sinx+cosx=1+sin2x
23. ## Trig

find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s in quadrant 3
24. ## Algebra

Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want
25. ## AP Chemistry

Hey guys! I have answers, but am confused. Please and thanks for any help! A) Which of the following is false? 1.A spontaneous change occurs by itself without assistance. 2.The greater the statistical probability of a state, the greater is its entropy. 3.A
26. ## Chemistry - radioactivity

Hello Dr.Bob. Could you check my work please? I'm not sure if I'm right in how I solved this problem. Which of the following nuclides are most likely to decay via beta decay? A) I-131 B) Pb-206 C) F-18 D) Zr-90 E) Ar-40 I know that nuclides undergo beta
27. ## Science

A student is trying to identify the different forms of energy described in the following chart: Form of Energy Description Examples Energy A energy that travels in waves through space light radio waves Energy B energy that depends on the height of an
28. ## Physics

My physics optional extra work: This would be helpful so I can compare the solutions here as I do the work by myself. Question: A car enters a circular flat curve with a radius of curvature of 0.20 km with a maximum speed of 135 km/h. If the friction
29. ## Physics

A shot-putter puts a shot (weight = 71.9 N) that leaves his hand at distance of 1.47 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.20 m above the ground. Include the correct sign for work. J
30. ## science

How much work is needed to raise a 110-kg load of bricks 12m above the ground to a building under construction? According to the law of conservation of energy, the work required equals the change in potential emergy. To get the increase in potential
31. ## Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
32. ## Social Studies

How did Reconstruction affect daily life in south Carolina? A. Carpetbaggers and scalawags had less of an influence on the state.**** B. Northerners and freedman had more opportunities in the state. C. African Americans families received 40 acres and a
33. ## Ummmm, LA Help?

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 The Watsons Go to Birmingham—1963. Provide an explanation for your choices. How did the role you selected and
34. ## CP Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
35. ## Physics

a great of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/ or a machine that produces more work or energy
36. ## Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
37. ## MATH

The work crew for the talent show at the local high school includes these members: 2 freshmen,4sophomores,8juniors,6 seniors.If the sponsor randomly chooses 1 member of the work crew to announce the act & 1 member to control the lighting, what is the
38. ## Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
39. ## Physics 1

A shot-putter puts a shot (weight = 71.3 N) that leaves his hand at distance of 1.62 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.08 m above the ground. Include the correct sign for work. J
40. ## CHEMISTRY

Been trying for days to crack this sure it staring me in the face understand princple just can't work out the one I have been given to do. I have to polymerize CH2=CH-CH-OH with a CH3 under CH next to the OH I need to identify the monomer unit and what
41. ## Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
42. ## Physics

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of
43. ## chemistry

The electrochemical cell described by the balanced chemical equation has a standard emf (electromotive force) of -4.05 V. Calculate the maximum electrical work (kJ) the cell has done if 6.8500 mol of F2(g) (Molar Mass - 38.00 g/mol) forms. Round your
44. ## Health. Check my answers please

Can someone please check my answers. 1. Violence resulting in the death of another person is called A. Bullying B. Homicide C. Conflict D. Rape 2. Using the excitement of violence to keep video games users playing their games is an example of which risk
45. ## Health Check answers plz

Can someone check my answers? 1. Obesity is the condition of being significantly overweight. A. True**** B. False 2. Obesity is body weight that is normal for that particular age, sex and height. A. True B. False**** 3. The number of children in the United
46. ## Chemistry

Write the balanced camical equation for the complete combustion of propane C3H8, a fuel used in gas grills (carbon dioxide and water are products). This is the WRONG answer that I got... 2(C3H8) + 7(02) -> 3(CO2) + 8(H20) Can anybody help me? 2(C3H8) +
47. ## History

(So, I have to agree or disagree with regards to the statement provided.. please comment on how I can make my answer better) Confirming Max Weber’s thoughts on the dynamics between religion, economics, and culture--Protestantism and urbanization had a
48. ## science

Moving at 20m/s a carr of mass 2000kg applies its brakes and comes to rest over a distance of 10m. Find the size of the net force that acted to stop the car. would I find t using t=dv. then would I use that for F=(m*v)/t ? The speed doesn't stay constant,
49. ## Literacy

The trend toward two-family income has led to A. policies allowing only one family member to work for a company. B. flexible work schedules, pregnancy benefits, and elder-care programs. C. businesses paying lower wages and hiring fewer workers. D. fewer
50. ## Literacy

The trend toward two-family income has led to A. policies allowing only one family member to work for a company. B. flexible work schedules, pregnancy benefits, and elder-care programs. C. businesses paying lower wages and hiring fewer workers. D. fewer
51. ## scientist

Mr.Becks gigantic gas- guzzling exhaust spewing urban assault vehicle suburban weighs 10000 pounds it takes Mr Beck 2 minutes to drive 1.5 kilometers to west valley fitness so he can ride the stationary exercise bike for a half hour How much work and power
52. ## Physics

Tarzan plans to cross a gorge by swinging in an arc from a hanging vine (see Fig). If his arms are capable of exerting a force of 1200 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 84 kg and the vine
53. ## Trig

Plane leaves airport with heading of 110 degrees at 300 mph, the wing out of the southwest is 42 mph. locate the plane after 4 hours? find the distance back to airport and angle from due east?
54. ## trig

From the top of a tower of height 75m, a man sees two goats, both due west of him. If the angles of depression of the two goats are 10 degrees and 17 degrees, calculate the distance between them. It wants the angle of depression. I , myself, don't
55. ## trig

A tree on a hillside casts a shadow c ft down the hill. If the angle of inclination of the hillside is b to the horizontal and the angle of elevation of the sun is a, find the height of the tree. Assume a = 48°, b = 18° c = 235 ft. (Round your answer to
56. ## trig

a hedgehog wishes to cross a road without being run over. he observes the angle of elevation of a lamp post on the other side of the road to be 27 degrees from the edge of the road and 15 degrees from a point 10m back from the raod. How wide is the road??
57. ## algebra

Mike's family wants to build a rectangular fenced backyard area for their dog. They have a 20-meter length of wire fence and four posts. They can also use the 20-meter straight length of the back of their house as a side of the enclosure, but the fence
58. ## math

If a job can be done by 10 workers in 5 hours, the work load is 10(5) = 50 man-hours. If 4 workers is doing the job for 6 hours, the work done is 4(6) = 24 man-hours. A remaining of 50 - 24 = 26 man-hours of work still needs to be done. Problem Eleven men
59. ## accounting

Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each
60. ## psy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula
61. ## psycholgy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula
62. ## algebra

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
63. ## Algebra-HELP!!!!

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
64. ## algebra

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
65. ## Physics

A person heats a can of soup on a stove. If he does 250 Joules of work ON the soup by stirring it as the burner adds 1675 Joules of heat, what is the change in its internal enegry? I did 250- 1675 because the work done On something is negative. can you
66. ## physics

A car moving at 50 km/h skids 15 m with locked brakes. Show that a car moving at 150 km/h will skid 135 m with locked brakes. (Hint: The force doing work during the skidding is the same for both speeds. Use the work–energy theorem.)
67. ## Science(Magnets)

Should be easy, this. The two south pole ends of two magnets are touching. Which of the following can be concluded? A. No work was required by an outside force. B. The magnets are naturally attracted to each other. C. Work was required by an outside force.
68. ## physics

A roller coaster (375. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
69. ## Physics

A roller coaster (340. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
70. ## Physics

I need help with these three questions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c)
71. ## Physics

I need help with these three questions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c)
72. ## Physics

A man pushes a 200 N crate up a frictionless incline with a slope of 20 degrees. The crate is raised by 4 m as shown. Assuming the crate moves at constant speed, what is the work done by the man?. I know Work = Force x Displacement. The answer is 800 N.
73. ## physics

A roller coaster (425 kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
74. ## Physics

I need help with these two uestions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c) 1.76J
75. ## Language Arts

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 Dragonwings. Provide an explanation for your choices. How did the role you selected and the work you
76. ## Probability

There are 6 methods of travel (walk,run,unicycle,bicycle,scooter,car). For three days, Max decides that he wants to randomly select his method of travel taking him to work. What is the probability that exactly one of the three days, Max walks to work?
77. ## Math

Find the sum of each series by using appropriate formulas. Show your work. MY WORK: (N is the last number in the sequence) 1+2+3+...+230 n(n+1)/(1*2) 4+8+12+...+360 n(n+4)/)4*2) 1+3+5+...+123 ((n+1)/2))^2 The problem: 53+59+65+...+233 n(n+6)/(6*2)
78. ## calculus

Eight and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch. (Round your answer to two decimal places.)
79. ## Physics

you lift a 10 N physics book up in the air a distance of 1m at a constant velocity of .5m/s. What is the work done by the weight of the book? a) +10 J b)-10 J c) +5 J d)-5 J 10 N is the force of gravity and to find work you do this: W=F_g(change in
80. ## physics

for both of these object system1: earth and ball if a ball is falling down, is the work done on it positive since force and displacement are in the same direction. system 2: earth and basket a basket is tied to a rope and is dropped then come to a full
81. ## Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. ANSWER in MJ (b) Determine the amount of additional work that is required to put the payload into circular
82. ## Math

Jared can work 54 math problems in 1 hour. How many problems can he work in 10minutes?
83. ## time and stress management

if you have to many tasks to complete at work ,you should (a)take a deep breath and start at the top of the pile and work your way down as quickly as possible (b)complain to your boss that its an inreasonable amount of work (c)decide for yourself what is
84. ## account

Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month,
85. ## more thermo

For the following question I was able to find the heat transfer and the entropy but I am having trouble finding the work done. When i solved delta E = Qnet - Wnet I got Win = Wout but Im not sure that is correct. I think that i need to solve for the final
86. ## Physics-Please check if I did this correctly

I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the
87. ## Spanish

I'm doing my work but i don't get these three questions at all. Could you explain them as well? ★Which part of this sentence is not correct? Esta muchacha tan bonito es alta. A. Esta B. bonito ✔C. muchacha ★Choose the correct verb for
88. ## English

I am writing an essay on "No Exit" by Jean-Paul Satre. The question is: How does the author's manupulation of time contribute to the effectiveness of the work as a whole. Do not just merly summerise the plot. I know that time in Hell is suspended/ halted.
89. ## math

Describe a real life situation that could be modeled by a function. A real life situation is: A family decides that they want to get the carpet done in their house. They already have all the necessary material to do the work but they do not know how. They
90. ## PHYSICS

A 41kg box is being pushed a distance of 7.0m across the floor by a force P whose magnitude is 158N. The force P is parallel to the displacement of the box. The coefficient of Kinetic friction is 0.25. Determine the work done on the box by each of the four
91. ## Math(analytic geometry)

I'm studying analytic geometry and i came accross this question;"find the tangents common to x²+ y²=8 and y²=16x.How am i going to work it out,please? I tried to work out their gradients which gave me x²+y²=8 2x+2ydy/dx=0 dy/dx=-2x/2y =-x/y y²=16
92. ## maths

A pie graphs show the budget of 2 business for 2 different business.How do you work out the different expenses each month and Calculated the cost in Rands.1 company budget is R12000 and other is R9200.How do u work out the pie graphs .need to get the
93. ## chemistry

What is the change in internal energy (in J) of a system that absorbs 0.246 kJ of heat from its surroundings and has 0.771 kcal of work done on it? Is this correct? 0.246, kJ x (1000 J/1 kJ) = 246 J 0.771 kcal x (4184 J/1 kcal) =3225.86 j 246 J + 3225.86 J
94. ## physics

a 5.0 kg mass hangs at the end of a cord. Find the tension in the cord if the acceleration of the mass is 1.5 m/s squared up. I'm trying to find the formula (s) to plug in the numbers to work the problem. if you can help me with the formulas and plugging
95. ## Molecular Formula

How do you work out the molecular formula? Generally you convert grams to mols, then find the ratio of the atoms to reach other. But this is all generality. Why don't you post the entire problem, tell us what you know how to do and what you don't
96. ## Accounting help

Bank Reconciliation Prepare a bank reconciliation as of October 31 send the following information: a. October 31 cash balance in the general ledger is \$1688. b. The October 31 balance Sean thinks statement is \$746. c. Checks issued but not returned with
97. ## University of Botswana

Define Ethics and show how it relates to Metaphysics and Epistemology. Check these sites. http://en.wikipedia.org/wiki/Ethics http://en.wikipedia.org/wiki/Epistemology http://en.wikipedia.org/wiki/Metaphysics Why are we here on Earth? What is our Purpose?
98. ## Chemistry

What volume of NaOH is required to neutralize 50mL of 0.5M phenol? So this is just a small calculation in a complex problem, and I would just like someone to check my work so I don't mess up the entire problem based on this calculation. So mol phenol=
99. ## English

Can you please check if the following sentences are ok? Thank you in advance. 1) "Express your regret for the following situations using a wish construction". Example: I didn't study for the test. I got a bad mark. I wish I had studied for the test. 2)
100. ## SS

Can you check my answers? MY NEW ANSWERS ARE............ 1-C 2-A 3-D 4-D 5-A 6-C Correct now?!! 1;what was the effect of WWI on SC? A;state economy shrunk*** B;citizens used more resources C;factoryy production slowed D;women worked mens jobs 2;How did the