# trig help much appreciated! :))

3,764 results
1. ## calculus

1. what trig function has an amplitue of 1 and negative values for angles between π/2 and π? 2. what trig function never crosses the x-axis and has a value of 2 at π/6? are these correct? 3. what trig function has a period of π and is undefined for

asked by anon on September 28, 2015
2. ## CALCULUS HELP!!!

integrate 1/(x^2sqrt(1+x^2)) i know you have to use trig sub but iono how to cancel out some terms...much help is appreciated

asked by kevin on March 19, 2009
3. ## math

could someone please refresh my memory of the basic trig functions? ex) cos^2 + sin^2 = 1? That is a trig identity. http://www.sosmath.com/trig/Trig5/trig5/trig5.html

asked by raychael on April 13, 2007
4. ## trig

What is the shift along x of the trig function y = cos(4x/3 minus 1)? Any link of proof would be appreciated if you have one Thank you

asked by Priya on April 22, 2008
5. ## trig

What is the shift along y of the trig function y = cos(4x/3 minus 1)? Any link of proof would be appreciated if you have one Thank you

asked by Priya on April 22, 2008
6. ## precalc

Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4

asked by Joshua on December 5, 2011
7. ## trig

I am currently taking a trig class. I need help understanding how to solve for sin,cos, and tan in problems which give an angle and a side length or the hypotenus. Any help would be muchly appreciated

asked by Ben on February 11, 2015
8. ## Precalculus

How would you solve this trig function: cos2x=sin^2-2 how do you know what trig identities to use?

asked by Jess on August 6, 2011
9. ## Calculus

so we are doing integrals and I have this question on my assignment and I can't seem to get it, because we have the trig substituion rules, but the number isn't even so its not a perfect square and I just cant get it, so any help would be greatly

asked by Tracy on June 11, 2007
10. ## Trigonometry

Use the trig Identities to find the other 5 trig functions. Problem 7.)Tan(90-x)=-3/8 8.)Csc x=-13/5 9.)Cot x=square root of 3 10.)Sin(90-x)=-.4563 11.)Sec(-x)=4 12.)Cos x=-.2351 I need HELP!

asked by Jennifer on January 5, 2010
11. ## Math-Trigonometry

Show that if A, B, and C are the angles of an acute triangle, then tan A + tan B + tan C = tan A tan B tan C. I tried drawing perpendiculars and stuff but it doesn't seem to work? For me, the trig identities don't seem to plug in as well. Help is

asked by Sam on November 6, 2013
12. ## Trigonometry - Identities and proof

Show that cot((x+y)/2) = - (sin x - sin y)/(cos x - cos y) for all values of x and y for which both sides are defined. I tried manipulating both sides in terms of trig identities but I don't really have a solution....help would be appreciated, thanks.

asked by Sam on November 13, 2013
13. ## trig 26

simplify to a constant or trig func. 1. sec ²u-tan ²u/cos ²v+sin ²v change expression to only sines and cosines. then to a basic trig function. 2. sin(theta) - tan(theta)*cos(theta)+ cos(pi/2 - theta) 3. (sec y - tan y)(sec y + tan y)/ sec y combine

asked by hilde on March 14, 2010
14. ## Pre-Cal

[Note: I'm still having issues with identities with regard to trig] Verify the Trig. identities: (a). cot(x+y)=(cotxcoty-1)/(cotx+coty) (b). sin0(cot0+tan0)=sec0 [Note: 0=theta symbol]

asked by Amber on July 12, 2016
15. ## Math (integrals) (Trig Subsititution)

Find ∫1/((x^2+5)^(3/2)) dx I figured this would be a trig substitution problem, so I set x = sqrt(5)tanθ and dx = sqrt(5)sec^2(θ) dθ This would lead to: ∫(sqrt(5)sec^2(θ)) / (5tan^2(θ) + 5)^(3/2) dθ But I'm kinda lost on what to do next. I'm used

asked by Ray on May 12, 2017
16. ## trig

hi, I have a placement test coming up tomorrow, and I'm pretty confident about all the stuff that's going to be there except trigonometry. I took trig two years back and I understood it very well. But now it's been so long and I can't even remember the

asked by y912f on June 1, 2010
17. ## Trigonometry

Hi, I need help with this question: Use the addition and subtraction formulas ti fubd the exact values of the trigonometric ratios: cos(-7pi/12) Okay, I'm just having trouble with a rather basic part of the question... I wrote cos(pi/4 + pi/3), but now I

asked by Lucy X on December 8, 2008
18. ## Trigonometry/Geometry - Inequalities

Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This

asked by Sam on December 7, 2013
19. ## calculus-integration!

should i use substitution?? if yes how should should i use it? plz i need some directions? k plz someone?...so far i used trig. substitution. i got a=8, so i used x=asin(è)so according to this substitution i got x=8sin(è) and dx=8cos(è) dè...then i

asked by Maria on May 6, 2007
20. ## Calculus

Okay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2,

asked by Tracy on October 21, 2006
21. ## Physics

he graph of the velocity of a mass attached to a horizontal spring on a horizontal frictionless surface as a function of time is shown below. The numerical value of V is 5.48 m/s, and the numerical value of t0 is 8.97 s. a) What is the amplitude of the

asked by Jalopy on November 21, 2012
22. ## math (final trig problem)

Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig

asked by jacob on May 1, 2007
23. ## math (trig)

i have some problems doing trig the first one is: Show that cos(x/2) sin(3x/2) = ½(sinx + sin2x) i know that you are supposed to substitute all those trig function things in it but i kind of forgot how to the only that i can see substituting in is the

asked by jacob on April 30, 2007
24. ## MATH PLEASE

can a reference angle be negative? Tye "reference angle" in google and check out the mathwords site :) no I copied and pasted the mathwords page for you, unfortunatly the diagram that was with it cant, express itself in text so it didn't appear. For any

asked by Kamen on November 22, 2006
25. ## I have a question concerning Spring Semester

Im a freshman in college and I just took Chem1, Trig, and Drama (12units). I am planning on taking Chem2, Pre-Calc, and Art1 for spring sem. (13units). I'm not sure if this is too much to take for next semester considering two five unit classes or should I

asked by L.Bianchessi on December 23, 2011
26. ## calculus

Integrate x/(x^2 + 4) dx via trig substitution and by u=x^2+4 substitution. Show that results are equal. Via trig substitution of x=2 *tan t, I get: 1/2 * tan^-1 (x/2) + c Via u = (x^2 + 4) substitution, I get: 1/2 * ln |x^2 + 4| + c How are these equal?

asked by mathstudent on December 31, 2007
27. ## Trigonometry

I have some trigonometric equations to do, but I'm pretty lost, and I have to get them done in a timely fashion, so any help would be much appreciated. "Solve the following trig equations. Give all the positive values of the angle between 0 degrees and 360

asked by Gary on March 9, 2011
28. ## math

Some people believe that calculators have eliminated the need to learn the skills required to perform mathematical operations by hand. State your position on this belief, and then support your position with real-life stories or examples I will be happy to

asked by carmen on March 4, 2007
29. ## geometry

In parallelogram TRIG, m∠R = 2x + 19 and m∠G = 4x - 17. What is m∠T

asked by miguel on February 26, 2012

Trig ientities

asked by yaga on September 4, 2016
31. ## MATH

Integrate 1/(x(x^2+1)) dx using trig substitution

asked by ANON on July 24, 2016
32. ## trig

what is the exact value of 7pi for all trig func.?

asked by claire on February 2, 2010
33. ## Trig

Trig Identity. 1-sin^2x/1-cosx

asked by Jill on May 15, 2011
34. ## Trig

Solve the following trig equation 2cos(x-π/6)=1

asked by Matt on January 31, 2012
35. ## Trigonometry

Use trig form to find quotient 3/(2+3i)

asked by Shannon on November 17, 2015
36. ## Pre- Calculus

Evaluate the trig function tan33degress

asked by Steve on February 24, 2012
37. ## math

simplify sin(540-2x) this is to do with trig

asked by allie on May 10, 2013
38. ## Pre Calc , Math

Find the 6 Trig ratios of -7Pie/3

asked by Joe Daddy on January 3, 2011
39. ## trig

What is the range of the trig function sin(-3x+3)?

asked by Chaitanya on April 21, 2008
40. ## MATH

Solve the integral using trig substitution (1/((x)(x^2+1)))dx

asked by ANON on July 24, 2016
41. ## trig

how to i find the six trig values for (7pi/3)

asked by Rak on January 13, 2010
42. ## math

I need help with this trig problem cotθ=-√3/3 and 3/2π≤θ≤π, find θ

asked by arlene on October 8, 2012
43. ## trig

write 2+2 squareroot of 3i in trig form.

asked by ky on May 17, 2012
44. ## Trig

Find (if possible) the trig function of the quadrant angle.

asked by Master chief on June 6, 2011
45. ## math

how do i solve this using trig identities? 2 csc^2x = 3 cot^2x-1

asked by Kayla on October 17, 2007
46. ## Geometry.

HELP WITH ALOT OF QUESTIONS? TRIG? I don't get any concepts.

asked by Amy. on January 25, 2010
47. ## Trig

csc thea= -2, quadrant 4. what are the six trig functions?

asked by Shay on May 6, 2013
48. ## trig

write a product of two trig functions that equals 1.

asked by Dani on November 7, 2011
49. ## Trigonometry

Can you please help me solve this trig equation for 0 ≤ x ≤ 2π? 9sin^2(x)-6cos(x)-10=0 Thank you!

asked by Lucy X on December 8, 2008
50. ## Precal

Write down 3 other possible trig forms for - 1 + isqrt2. How do you solve this?

asked by Mayhem on February 25, 2012
51. ## Math (trigonometry)

Find the value of each of the remaining trig functions. Cscè=-4, ð

asked by Anonymous on April 12, 2010
52. ## trig

what's the single trig. function of cos6xcosx-sin6xsinx

asked by MIK on May 17, 2012
53. ## trig

use the unit circle to find the exact value for all the trig functions of è=2ð/3.

asked by Anonymous on February 2, 2010
54. ## trig

TRIG Identities, Gr. 12: Prove: cot4x=1-tan^2x/2tan2x

asked by Josh on May 23, 2013
55. ## Geometry

30-60-90 triangle has a hypoteneuse of 10 use trig to find the short side

asked by Christa on August 3, 2011
56. ## trig

how do i do this? give the signs of the six trig functions for each angle: 74 degrees?

asked by Tay on December 3, 2008
57. ## Calculus

Integration with trig functions Integral of [(1-sinx)/cos^2x] dx

asked by Anonymous on February 13, 2015
58. ## Calculus....

can you show me how to maniplate this using Trig subtitution... integral dx/4+x^2 x is bounded on [-2, 2]

asked by belll on October 12, 2010
59. ## Math

Find the exact value of the trig function below. cos2Ø if sinØ = 2/5

asked by Sophie on March 19, 2017
60. ## Calc

How do you do the derivative of an inverse trig function? arcsin (sqrt2/2)??

asked by Hannah on October 27, 2011
61. ## pre calculus 2

use the fundamental trig. Identities to simplify tan^4x+2tan^2x+1

asked by denise on July 25, 2011
62. ## Math

What is the inverse trig function cotangent of square root of 3/3? What is the value?

asked by Bob on March 19, 2013
63. ## college

Trig help... equation on the interval [0,2pi]? 2sin^2(x)=sin(x)

asked by Sam on November 4, 2010
64. ## trigonometry

simplify sin7x-sin3x as a product of trig functions.

asked by casey on April 20, 2011
65. ## trig

What is the shift along x of the following trig functions? y = (3sinx/2) + 4 y = -2sin(x)-4 y = sin(-3x + 3)

asked by Amandeep on April 21, 2008
66. ## Math

Required to Prove the following trig identity: (cos2x)^2 + (sin2x)^2 = 1

asked by Halle on June 18, 2009
67. ## trig

How do you solve cos(2arcsin 1/4) using inverse trig. functions??!! PLEASE HELP ME!

asked by Tor on May 9, 2011
68. ## trig

What kind of reflection does the trig function y = cos(4x/3 minus 1) have?

asked by Chaitanya on April 22, 2008
69. ## 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.

asked by y912f on May 17, 2009
70. ## trig

What kind of reflection does the trig function y = cos(4x/3 minus 1) have?

asked by Priya on April 22, 2008
71. ## math

how would you solve for x: (3)^.5sin(2x)-2cos(2x)+2sin^2(x)=1 using trig identites. please help

asked by mike on May 4, 2009
72. ## trig

What kind of reflections are the following trig functions? y = 3cos(x-1) y = sin(-3x+3) y = -2sin(x)-4

asked by Joshua on April 21, 2008
73. ## trig

find the 5 trig ratios when sin theta = -5/13 and lies in quadrant 3

asked by karen on September 15, 2011
74. ## math

what is 7-2i in trig form? and if u=3j and v=7i+j what is the dot product of u times v don't get this one because there are no i terms for u thanks

asked by jane on December 30, 2010
75. ## math

In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?

asked by msmith on April 14, 2013
76. ## gr 12. advanced functions

Trig identity Prove: cos2x tan(pie/4 - x) ------- = 1 + sin2x

asked by avm on November 21, 2009
77. ## math

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

asked by Amina on November 20, 2012
78. ## Trig

Find (if possible) the trig function of the quadrant angle. sec 3pi/2

asked by Master chief on June 6, 2011
79. ## trig

simplify to a constant or basic trig function.. 1+tan(x)/1+cot(x)

asked by hilde on March 14, 2010
80. ## Calculus

1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.

asked by K on April 5, 2015
81. ## Trig

find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?

asked by ALISON on September 2, 2011
82. ## trig

find the exact values of the six trig functions of theta equals six pi divided by 8

asked by don on October 18, 2011
83. ## college Calculus Help!

Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x

asked by dania on February 25, 2012
84. ## trig

express the trig. ratios sinA,secA n tanA in terms of cotA.

asked by Anonymous on May 7, 2011
85. ## Pre-calculus

find the trig functions of angle x if the terminal side of x passes through the point (-12, 5).

asked by Lala Kennedy on August 8, 2011
86. ## trig

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx

asked by Claire on January 19, 2012
87. ## trig

find the 5 other trig functions if cos(theta) = square root of 2/2 and cotangent is less than 0

asked by kelly on June 9, 2010
88. ## Trig

Does anybody know a good website that will help me with finding the six trig functions of a point NOT on the unit cricle?

asked by Anonymous on September 16, 2009

One more problem.. Given sin t= 3/11 and cos t

asked by Jane on January 27, 2016
90. ## math

4cot^2x-4/tanx+cosxsecx factorin algenraic single trig function

asked by josh on April 26, 2011
91. ## trig

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx

asked by Claire on January 19, 2012
92. ## trig

if (-12,5) is a pointon the terminal side of an angel 0 find the exact value of six trig funcation of 0

asked by sal on June 19, 2014
93. ## college Calculus Help!

Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x

asked by dania on February 25, 2012
94. ## Pre-Calc

Consider a triangle ABC. C is a right angle, and side a is opposite angle A, side b is opposite angle B, and side c is the hypotenuse. The measure of side a= 2, side b= 7, and side c= 7.3 How do you find the angle measure of A and B based on the lengths of

asked by Chris on September 20, 2006
95. ## TRIG!

Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6 x=1 - (3/4)sin^2 2x work on one side only! Responses Trig please help! - Reiny, Monday, February 23, 2009 at 4:27pm LS looks like the sum of cubes sin^6 x + cos^6 x = (sin^2x)^3 +

asked by hayden on February 24, 2009
96. ## Math 12

trig question 2sin^2x+sinx-6=0 how to solve for x when the restriction is x is greater than or equal to zero but less than 2pi

asked by H on October 21, 2010
97. ## Math Help

Permutation and combinations (Trig/alg2 class) In how many ways can all the letters in SEYCHELLES be arranged?

asked by Mary on June 10, 2013
98. ## math

The terminal side of theta is in Quadrant III and lies on the line y = 2x. What are the 6 trig functions?

asked by Becky on April 12, 2010
99. ## Calculus

Integrate [1/square root of(e^(2x)-1)]. I have to use u substitution. We are doing the integrals of inverse trig functions, but I cannot get it to work out!

asked by Elaine on February 6, 2012
100. ## precalculus

how you do you use the power-reducing formula to find the exact value of the trig function: sin^2(37pi/12)

asked by Jessica on December 13, 2010