# Find all the angles θ in the interval [-2pi, 2pi] for which cos(3θ) = 1/sqrt(2) I'm not sure why I would have to look for angles in 3 revolutions of the circle (3 positive, 3 negative). Also how would I

96,071 questions
1. ## Algebra 2

Find the values of the inverse function in radians. sin^-1(0.65) a. 0.71+2pi n and -0.71+2pi n b. 0.71+2pi n and -3.85+2pi n c. 0.86+2pi n and -0.86 +2pi n d. -0.61+2pi n and 2.54+2pi n 2. tan^-1(0.09) a.-0.09+2pi n b. no such angle exists c.-1.48+ pi n d.

2. ## Math

Can I please get some help on these questions: 1. How many solutions does the equation,2sin^2 2 θ = sin2θ have on the interval [0, 2pi]? 4? ...what about 4cos2θ = 8cos^2 2θ? 2. True or False: sin^2 4x = 1 has 8 solutions on the interval [0, 2pi]?

asked by mysterychicken on June 2, 2013
3. ## Calculus help??

I'm not sure how to solve this and help would be great! d/dx [definite integral from 0 to x of (2pi*u) du] is: a. 0 b. 1/2pi sin x c. sin(2pi x) d. cos (2pi x) e. 2pi cos (2pi x) This is the fundamental theorem, right? What's confusing me is the u and du

asked by ashley on April 28, 2015
4. ## Calc

Find the exact total of the areas bounded by the following functions: f(x) = sinx g(x) = cosx x = 0 x = 2pi I set my calculator to graph on the x-axis as a 2pi scale. The two functions appear to cross three times between x = 0 and 2pi. (including 2pi) Now,

asked by Sarah on April 21, 2007
5. ## Algebra2

Find the values of the inverse function in radians. 1. sin^-1(0.65)? answer choices: a. 0.71+2pi n and -0.71+2pi n b. 0.71+2pi n and -3.85+2pi n c. 0.86+2pi n and -0.86 +2pi n d. -0.61+2pi n and 2.54+2pi n My answer is B

asked by Steve on May 2, 2017
6. ## math

find all solution to the equation 3 cos(x+4)=1. in the interval of 0

asked by alicia otto on March 26, 2016
7. ## Trig

Find all solutions of the equation in the interval [0,2pi) 2 cos^2 x-cos x = 0 -2cos^2 + cosx + 0 (x+1/2) (x+0/2) (2x+1) (x+0) -1/2,0 2Pi/3, 4pi/3, pi/2, 3pi/2 my teacher circled pi/2 and 3pi/2 What did I do wrong? I don't understand...

asked by Anonymous on April 10, 2017
8. ## Math

For questions 2 and 3, use a calculator to find the values of the inverse function in radians. sin^-1(0.65) 0.71 + 2pi n and –0.71 + 2 pi n 0.71 + 2 pi n and –3.85 + 2 pi n 0.86 + 2pi n and –0.86 + 2pi n –0.61 + 2pi n and 2.54 + 2 pi n

asked by Harry on June 16, 2018
9. ## calc

i did this problem and it isn't working out, so i think i'm either making a dumb mistake or misunderstanding what it's asking. A particle moves along the x axis so that its velocity at any time t greater than or equal to 0 is given by v(t) = 1 -

asked by jane on April 2, 2009
10. ## Calculus AP - Volume of Revolution

Hi. I have a few calculus problems that I have to do using the washers and shell method to find out what the volume of the graph rotated is. I'll post one question at a time with my work. The problem is, I should be getting the same answer for the problem

asked by Kira on March 5, 2007

Find the surface area and volume of each of the following figures: d.Right circular cylinder v=pir^2h pi(3)(3)(6) pi(54) v=169.6 cubic cm sa=2pi r^2 + 2pi rh 2pi(3)(3)+2pi(3)(6) 2pi(9)+2pi(18) 56+113=169 Sa=169 square cm is this right???

asked by crystal on May 16, 2010
12. ## Precalculus

Solve for x given the interval of [0,2pi). cos^2x=2+2sinx I got (3pi)/2 or 270 degrees.. By the way, does the notation [0,2pi) mean 0

asked by Anonymous on May 4, 2014
13. ## Precalculus

Solve for x given the interval of [0,2pi). cos^2x=2+2sinx I got (3pi)/2 or 270 degrees.. By the way, does the notation [0,2pi) mean 0

asked by Anonymous on May 5, 2014
14. ## trig

Solve cos x-1 = sin^2 x Find all solutions on the interval [0,2pi) a. x=pi, x=pi/2, x= 2pi/3 b. x=3pi/7, x=pi/2, x=2pi/3 c. x=3pi/7, x=3pi/2, x=3pi/2 d. x=pi, x=pi/2, x=3pi/2

asked by Anonymous on May 23, 2012
15. ## ms sue! Algebra help

What are the graphs of y = cos x and y = sec x in the interval from -2pi to 2pi?

asked by Anny on May 12, 2015
16. ## trig

I need to find all solutions of the given equations for the indicated interval. Round solutions to three decimal places if necessary. 1.) 3sin(x)+1=0, x within [0,2pi) 2.) 2sin(sq'd)(x)+cos(x)-1=0, x within R 3.) 4sin(sq'd)(x)-4sin(x)-1=0, x within R 4.)

asked by Emily on June 21, 2009
17. ## Trig help

1. What is the period of the function? y = 4 cos pi x A. 1 B. 2 C. pi D. 2pi 2. Which represents the reference angle for 2pi/3? A. 2pi/3 B. pi/3 C. pi/4 D. pi/6

asked by Kirky on May 13, 2014
18. ## Math

3. find the four angles that define the fourth root of z1=1+ sqrt3*i z = 2 * (1/2 + i * sqrt(3)/2) z = 2 * (cos(pi/3 + 2pi * k) + i * sin(pi/3 + 2pi * k)) z = 2 * (cos((pi/3) * (1 + 6k)) + i * sin((pi/3) * (1 + 6k))) z^(1/4) = 2^(1/4) * (cos((pi/12) * (1 +

asked by Anonymous on January 28, 2014
19. ## Integration by Parts

integral from 0 to 2pi of isin(t)e^(it)dt. I know my answer should be -pi. **I pull i out because it is a constant. My work: let u=e^(it) du=ie^(it)dt dv=sin(t) v=-cos(t) i integral sin(t)e^(it)dt= -e^(it)cos(t)+i*integral cost(t)e^(it)dt do integration by

asked by Ashley on April 16, 2015
20. ## Math

The graph of f(x), a trigonometric function, and the graph of g(x) = c intersect at n points over the interval 0

asked by Max on March 19, 2018
21. ## math

Find all solutions to the equation tan(t)=1/tan (t) in the interval 0

asked by alicia otto on March 26, 2016
22. ## precalculus

z1=[cos pi/4 +sin pi/4] z2= [cos 2pi+sin 2pi] z1= sqrt 5 solve. how do you do this? substitute z1 and do what?

asked by DF on March 17, 2015
23. ## Pre calculus/ Advanced Functions

Samuel is investigating the rate of change of the function f(x) = cos x on the interval xE[0, 2pi]. He notices that the graph of f(x) passes through the x-axis at pi/2. He also determines the instantaneous rate of change at x = 0, pi and 2pi by inspection.

asked by Anonymous on June 9, 2015
24. ## Calculus

Let A denote the portion of the curve y = sqrt(x) that is between the lines x = 1 and x = 4. 1) Set up, don't evaluate, 2 integrals, one in the variable x and one in the variable y, for the length of A. My Work: for x: âˆ«[4,1] sqrt(1+(dy/dx)^2) dy/dx =

asked by Daisy on January 25, 2017
25. ## Physics check

A performer, seated on a trapeze, is swinging back and forth with a period of 9.55 s. If she stands up, thus raising the center of mass of the trapeze + performer system by 20.0 cm, what will be the new period of the system? Treat trapeze + performer as a

asked by COFFEE on April 12, 2007

Find exact values for all the solutions to the equation cos theta = sqrt 3/2 for -2pi

asked by George on November 7, 2014
27. ## Trig

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.

asked by Travis on December 2, 2008
28. ## math

Hello there, im doing an equation and its mind boggling me badly so i want to see if im doing something wrong or not. It goes like this: sinx - Squareroot of 3/2 > 0 x € [0,2pi) i start by moving the sqroot of 3.. so i have sinx >sq3/2. as of that my

asked by paul on April 29, 2014
29. ## algebra

i need someone to explain to me how i got this answer...i know the answer but i need an explanation to the problem... C=2pi(r) the answer is r=C/2pi...i need someone to explain it to me..thank you C = 2pi(r) Divide both sides by 2pi C/2pi = r ----> r =

asked by logan on August 16, 2007
30. ## Maths

Eq of curve is y=b sin^2(pi.x/a). Find mean value for part of curve where x lies between b and a. I have gone thus far- y=b[1-cos(2pi x/a)/2]/2 Integral y from a to b=b/2(b-a)-ab/4pi[sin(2pi b/a)-sin2pi) MV=b/2-[ab sin(2pi b/a)]/(b-a) Ans given is b/a. I

asked by MS on September 4, 2013
31. ## Solving Trig Equations

Solve for x in the interval [-pi,0] a) sin^2x = 3/4 I know that you have +root3/2 and -root3/2 and the positive one gives you an error when doing the inverse of sin, but im confused about the -root3/2. I found that one of the answers of x is -pi/3 (-60

asked by Mandy on November 27, 2015
32. ## Math

1. On the interval [0, 2pi] what are the solutions to the equation sin3xcos2x = -cos3xsin2x + 1? pi/10 and pi/2? 2. What is the value of tan75degrees? √(3) + 1)/(1 - √(3))? 3. Value of cos(130degrees)cos(130degrees) + sin(10degrees)sin(10degrees)? Not

asked by mysterychicken on June 3, 2013
33. ## math (trig)

For the following value of cos 0, determine the rad value of 0 for pi < 0 < 2pi (greater than or equal to pi and 2pi) -1/2 I don't understand I found out that the inner circle val is pi over 3. But I can't work out how to find 0

asked by Laura on January 28, 2018
34. ## trig

Find all real numbers in the interval [0,2pi) that satisfy the equation. cos^2 x+2 cos x+1 = 0

asked by Trig on July 4, 2013
35. ## Math

Find the solutions for this equation in the interval [0, 2pi). cos^3 x = cos x Are they 0 and pi?

asked by Anonymous on October 18, 2015
36. ## Precal

How do you find all the polar coordinates of P=(-1, -2pi/3)? I've read that you're supposed to add 2pi to find the coterminals but when I do that I get different answers then in the book. The book answer is (1, 2pi/3+ (2n+ 1) pi) and (-1, -2pi/3+ 2npi).

asked by Mayhem on February 25, 2012
37. ## Pre-Calculus

Can someone please explain on how to solve this equation so I can do the others that are similar to this one? Find the solutions of the equations that are in the interval [0,2pi) cos x cot^2 x= cos x Thank you!

asked by Anonymous on May 9, 2015
38. ## Math

Let A denote the portion of the curve y = sqrt(x) that is between the lines x = 1 and x = 4. 1) Set up, don't evaluate, 2 integrals, one in the variable x and one in the variable y, for the length of A. My Work: for x: integral[4,1] sqrt(1+(dy/dx)^2) dy/dx

asked by Daisy on January 25, 2017
39. ## math

Find all solutions.In the interval (0, 2pi} of cos(2x) - 2 cos(x) = 1

asked by Anonymous on September 12, 2018
40. ## Algebra 2

A sound wave is modeled with the equation y= 1/4 cos2pi/3 theta. a. Find the period. Explain your method. b. Find the amplitude. Explain your method. c. What is the equation of the midline? What does it represent? a) Period: 2pi/b 3 units T= 2pi/2pi/3 =

asked by Veronika on February 23, 2016
41. ## pre cal

Find all solutions in the interval[0,2pi),cos x/2-sinx=0

asked by kk on July 24, 2011
42. ## Calculus

Hello, I would like to make sure the answers to these questions are correct. 1. Using the shell method, what is the volume of a solid that is generated by rotating the region by y = x^2 and x = y^2 about the x axis. My Work: r = y h = sqrt(y) - y^2 2pi

asked by Daisy on January 18, 2017
43. ## calculus

Find circumference of the circle r=2acos theta. s= Int (0 to 2pi) of Sqrt(4a^2cos^2 theta+4a^2sin^2 theta)d theta =Int (0 to 2pi)2a*Int theta d theta =2a(2pi-0)=4a*pi Book shows 2a*pi. Am I wrong somewhere?

asked by ms on September 16, 2013
44. ## MATH

Please help me with these problems. Work and answer is appreciated! :) thanks. 1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution: 5tantheta+1=-2.89 16cos^2theta-6=3 6sin^2theta+sintheta=2

asked by gf on November 7, 2007
45. ## Forced Oscillation - drwls => I need your help =)

A 2.00kg object attatched to a spring moves without friction and is driven by an external force given by F= (3.00N)sin(2pi*t) The force constant of the spring is 20N/m. Determine a) period b) amplitude of motion a)T= 2pi/omega T= 2pi/ 2pi= 1s b)A= (Fo/m)/

asked by ~christina~ on February 22, 2008
46. ## Calculus HELP plz

Find the area of the surface obtained by rotating the curve y=sqrt(4x) from x=0 to x=1 about the -axis. about the x-axis. surface area= ⌠ 2pi * f(x)*sqrt[1 + (f'(x))^2] dx from a to b ⌡ it's been 45 years since I used that formula. I ended up with the

asked by jimmy on May 12, 2007
47. ## Physics

A 24.00 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at x=0. Somebody pushes the mass to the position x=0.3500 m, then lets it go. The mass undergoes

asked by Liz on November 8, 2014

find the solutions of the equation that are in the interval [0,2pi) 2-cos^2x=4sin^2(1/2x)

asked by Hayli on November 4, 2010
49. ## trig

determine the solutions for tanxcos^2x-tanx=0 in the interval XE[-2pi,2pi] Ok, please describe the steps to me that you used to solve this! thank you

asked by Anonymous on April 27, 2009
50. ## Trigonometry

4. Find the exact value for sin(x+y) if sinx=-4/5 and cos y = 15/17. Angles x and y are in the fourth quadrant. 5. Find the exact value for cos 165degrees using the half-angle identity. 1. Solve: 2 cos^2x - 3 cosx + 1 = 0 for 0 less than or equal to x

asked by Tiffany Enlow on April 10, 2009
51. ## Trigonometry

Use De Moivre's Theorem to write the complex number in trigonometric form (cos(2pi)/7)+ i sin((2pi)/7))^5

asked by O on May 25, 2015
52. ## College Physics

A 7 kg mass hangs on a 10 meter long weightless cord. To the nearest cm, what should the new length of the pendulum be in order that the new frequency be 1.8 times its current value? The correct answer is 309 but I got 250. Heres what I did.. (1/2pi)(sqrt

asked by Sammy on July 13, 2013
53. ## precalculus help

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)? do not even know how to apply demoivre theorem?

asked by jk on March 31, 2015
54. ## trig equations

Find all solutions (if they exist)for the given equation on the interval [0,2pi) cos^2x-5sinx+5=0

asked by Elan on March 4, 2015
55. ## Math Trig

Find all solutions on the interval [0,2pi] for the following: 2sin^2(x)-5sin(x)=-3 cos^2(x)+sin(x)=1

asked by Kelly on March 14, 2011
56. ## trig

Find the exact solutions of the equation in the interval [0,2pi). sin(x/2)+cos(x)=0

asked by Isaac on December 5, 2011
57. ## math

Determine solutions for: tanxcos^2x - tanx = 0 in the interval[-2pi, 2pi]

asked by o on November 20, 2009
58. ## RESPONSE to PreCalc Question

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 7 4 1 7 1 8 8 I don't follow your work Reiny ¡î3sinx + cosx = 1 ¡î3cosx = 1-cosx square both sides 3cos^2 x = 1 - 2cosx + cos^2 x 3(1-sin^2 x) = 1 - 2cosx + cos^2 x this

asked by Kate RESPONSE on March 1, 2010
59. ## trigonometry

Graph the function f(x)=-1/2sin2x+1 on the interval [-2pi, 2pi]

asked by Dini on November 2, 2010
60. ## math

using Rolles theorem to see if it can be applied to f. If so, find all numbers c such that f`(c)=0 f(x)=sin(x)+cos(x) interval [0,2pi]

asked by Anonymous on June 14, 2015
61. ## Math

Find all solutions of the given equation in the interval [0, 2pi) cos x/2 - sin x = 0 Hi, I am struggling with this question. Can anybody help me please? Thanks!

asked by Lottie on July 12, 2016
62. ## math

Evaluate. 1. sin^-1(-1/2) 2. cos^-1[(-root 3)/2] 3. arctan[(root3)/3] 4. cos(arccos2/3) 5. arcsin(sin 2pi) 6. sin(arccos 1) I got these values as my answers: 1. -pi/6 2. 5pi/6 3. pi/6 4. 2/3 5. 2pi 6. 0 Can someone please tell me if they are right? thank

asked by anonymous on January 7, 2010
63. ## calc

find the area between the x-axis and the graph of the given function over the given interval: y = sqrt(9-x^2) over [-3,3] you need to do integration from -3 to 3. First you find the anti-derivative when you find the anti-derivative you plug in -3 to the

asked by mikayla on April 18, 2007
64. ## Trigonometry

Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation cos^2(x) = sin^2(x/2)

asked by Nikki on July 15, 2012
65. ## Trigonometry

Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation sin^2(x) = cos^2(x/2)

asked by Nikki on July 15, 2012
66. ## Calculus

Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function

asked by Elizabeth on April 27, 2012
67. ## maths need help

using the interval [0,2pi] and f(x) = sinx + cosx, obtain c £ (0,2pi) that satisfies the conclusion of Rolle's theorem where £ mean element of and C means number show step

asked by dud on October 1, 2016
68. ## Calculus

A cylindrical drum is made to hold exactly 1m^3 in its interior. Assume that the material for the top and the bottom costs \$20 per m^2, while that for the side costs \$10 per m^2. Determine the radius of the drum that minimizes the cost of the material

asked by Frederique on December 10, 2006
69. ## calculus

Find complete length of curve r=a sin^3(theta/3). I have gone thus- (theta written as t) r^2= a^2 sin^6 t/3 and (dr/dt)^2=a^2 sin^4(t/3)cos^2(t/3) s=Int Sqrt[a^2 sin^6 t/3+a^2 sin^4(t/3)cos^2(t/3)]dt =a Int Sqrt[sin^4(t/3){(sin^2(t/3)+cos^2(t/3)}]dt=a Int

asked by ms on September 18, 2013
70. ## Math

It takes ten identical pices to form a circular track for a pair of toy racing cars. If the inside arc of each pair is 3.4 inches shorter than the outside arc, what is the width of the track? any help would be greatly appreciated. If you know that the

asked by Amey on October 5, 2006
71. ## Trigonometry

Find the angular speed in radians per sec. of the second hand on a clock. My answer is 1 rpm =1*2pi radians/1minute(1 rotation = 2pi radians) =2pi radians/60seconds =1/30 radians/seconds It goes 2PI radians in 60 seconds. What happened to the PI? I forgot

asked by James on July 4, 2007
72. ## Math

cos x = -0.6 , 0

asked by Lester on November 7, 2014
73. ## Pre-Calc/Math

Use factoring, the quadratic formula, or identities to solve cos(x)+1=sin^(2)x. Find all solutions on the interval [0, 2pi)

74. ## Calculus

Find the interval(s) where the function is increasing where and it is decreasing. f(x)=sin(x+(pi/2)) for 0≤x≤2pi so my derivative is f'(x)=cos(x+(pi/2))? and my critical number is -pi/2?

asked by sh on December 5, 2010
75. ## Math

what does cos x = 0.418? On the interval (0,2pi)

asked by Candyce on December 1, 2011
76. ## Calculus

How would I go about solving this equation on the interval [0,2pi] cos^2 + 2 cos x + 1 = 0

asked by Kelly on November 20, 2007
77. ## precal

solve the equation on the interval [0,2pi) cos(x+pi/4)-cos(x-pi/4)=1

asked by john 2020 on March 19, 2010
78. ## Precalculus

solve the equation in the interval [0, 2pi) cos^2 x - cos x - 1 = 0

asked by Anonymous on September 7, 2018
79. ## Trig

Find all solutions of the equation in the interval [0,2pi). sqrt(3)cottheta-1= 0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

asked by Rachal on May 15, 2011
80. ## Calculus

2sin(2theta) + sqrt(3) = 0 interval (0,2pi) How do I solve this? I thought about maybe subtracting the sqrt(3) from both sides, so that i would have 2sin(2theta) = -sqrt(3) Then maybe dividing by two? sin(2theta) = -sqrt(3)/2 Am I doing anything right

asked by Hannah on September 20, 2011
81. ## Calculus 1

I'm asked to find max and min of: L(t)=12+2.8sin((2pi/365)(t-80). I find the derivative as: L'(t)=(5.6*pi/365)*cos[(2pi/365)(t-80)] but I get lost afterwards.

asked by Leo on July 8, 2013
82. ## Algebra

2pi(x^2 + 4x + 4) + 2pi(x^2 + 7x + 10) How do I write this as a polynomial in standard form (by factoring out 2pi)?

asked by Anonymous on February 27, 2014
83. ## MATH

Solve the equation algebraically for x where 0

asked by Anonymous on September 3, 2009
84. ## Pre-Calculus

The period T (in seconds) of a simple pendulum is a function of its length l (in feet), given by T(l) = 2pi sq root of l/g, where g = 32.2 feet per second per seconds is the acceleration of gravity. Express the length l as a function of the period T. If

asked by Erica on October 5, 2006
85. ## physics

A pendulum clock can be approximated as a simple pendulum of length 1.20m and keeps accurate time at a location where G=9.83m/s2. In a location where g=9.73m/s2, what must be the new length of the pendulum, such that the clock continues to keep accurate

asked by Cavin on March 31, 2007
86. ## precalc/trig

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

asked by bob on November 29, 2012
87. ## Calculus

maximum and minimum of y = cos(x) + sin (x)on the interval [0,2pi]

asked by Mark on October 25, 2009
88. ## Trigonometry

Solve each equation on the interval [0, 2pi): a. 4sin^2(x)-3=0 b. cos(3x)=-1

asked by O on March 28, 2015
89. ## trig

3tan(3x) = sqrt(3) Solve the equation for exact solutions of the interval [0,2pi).

asked by kyle on November 4, 2010
90. ## Pre-Calculus

Find the solutions for sec^2x+secx=2 that fit into the interval [0, 2pi] I figured out that pi/3 (after factoring and switching things around) was a solution, but then I got stuck on cos x = 1/3.

asked by Sharon on April 20, 2008
91. ## math

Can someone please check my answers and help me with the last question! 1. Solve sin2xcos2x = 4sin2x on the interval [0, 2pi] 0, pi, 2pi? 2. Exact value of sin(pi/12) - sin(5pi/12) root3/4? 3. Using factorial notation, 0! = 1 False? 4. Find the area of the

asked by mysterychicken on June 6, 2013
92. ## precalculus

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?

asked by jk on March 31, 2015
93. ## precalculus

Let z1=2(cos 2pi/3+isin 2pi/3) what are z1^(1/3)?

asked by jk on March 31, 2015
94. ## precalculus

Find the tan(x), the sin (x + pi) if it is known that cos (x)=.6 and that (3pi)/2 less than x less than 2pi. Find the sine (2x), the tan (2x), and the cos (x/2) if it is known that cos (x)=.6 and that (3pi)/2 less than x less than 2pi.

asked by marie darling on April 10, 2013
95. ## Trig

Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < 2pi Find: sin (v + u) cos (v - u) tan (v + u) First compute or list the cosine and sine of both u and v. Then use the combination rules sin (v + u) = sin u cos v + cos v sin u. cos (v - u) = cos u

asked by Nan on December 29, 2006
96. ## calculus

Let g(x)=|cos x-1|. The maximum value attained by g on the closed interval [0, 2pi] is for x equal to A) -1 B) 0 C) pi/2 D) 2 E) pi I think its pi/2 but I'm not sure at all.

asked by =) on June 12, 2010
97. ## Trig

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!

asked by Wendy on September 16, 2011
98. ## simple harmonic motion

So I have the following information: Amplitude (A)=1.60mm, Angular Velocity (w)=2760 and phase constant (o) = pi/2. and I need to find: a)the period of oscillation. b)maximum speed. c)max magnitude of acceleration. Firstly I dont want anyone to give away

asked by Anon on October 9, 2017
99. ## Calculus (Help)

The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur. What the derivative of the function?

asked by Lerinda on October 25, 2012
100. ## Calculus (Help)

The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur. What the derivative of the function?

asked by Lerinda on October 25, 2012