# trigonometry

2,120 results, page 7

1. ### trigonometry

tanA - sin A /sin^2A= tan A / 1 + cosA Please prove this
2. ### trigonometry

y = 4sin(x-90)+3 Calculate interval of increase, interval of decrease, intercepts
3. ### Trigonometry

If possible find a solution to 2 cos(theta)=-0612. theta=
4. ### Trigonometry

Given that cot x = 5/ sqrt 11 find csc x A - 5/6 B - 6/5 C - sqrt11/ 6 D - 6/ sqrt11
5. ### trigonometry

In triangle ABC, a=8, b=15, and m<C=40 degrees. Find the area of the triangle to one decimal place.
6. ### Trigonometry

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

In a triangle PQR, angle Q=50 degrees,PR=5CM, QR=4CM. find angle P?
8. ### precalculus/trigonometry

Find a formula for the given linear function. The graph of h intersects the graph of y = x^2 at x = -2 and x = 4
9. ### trigonometry

parameterize the portion of the unit circle that begins at the point (-root2/2, root2/2) and ends at (0,-1)
10. ### trigonometry math help

If cos 20=m determine the values of the following in terms of m. (a)sin 250 (b)sin 20 thanks
11. ### trigonometry

Prove that 2sin150*cos315*cos(90-x)/sin(360-x)cos(-240)sin135=2
12. ### trigonometry

If sin theta =a/b and theta lies in first quadrant, find all t-ratios.
13. ### Trigonometry prove need help

Prove that (1-sinb)/(1+sin2b)=tan^2(45-b) plz the b means beta???
14. ### Trigonometry

For which angles in degrees if any, is sin A not equal to 1/csc A? Answer for 0 through 359 degrees.
15. ### trigonometry

Find the angle of elevation, depression and the height of a building from the tip of another building with a distance of 1.2 km.
16. ### Trigonometry

1.Find the missing values given that Ø in degrees=30. Can someone show me how to find sin
17. ### Trigonometry

28. Find all solutions if 0° ≤θ <360°. 4sin2 (3θ)−3= 0
18. ### trigonometry

Find an exact value for csc 11pi/12 How do I do this? I change it to 1/(sin 11pi/12) but then I'm stuck what to do.. Thanks
19. ### Trigonometry

Write an equation of cotangent with period = 3pi, phase shift = -pi, and vertical shift = -1
20. ### Trigonometry

How to divide a right angled triangle into two isosceles triangle ? Kindly help
21. ### trigonometry

Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^1/2 + 64 = 0
22. ### Algebra 2 w/Trigonometry

How would you work the problem: 2 with the exponent of 4 minus 3 times 5 divided by 10 plus 16-15 divided by 10?
23. ### trigonometry

solve for 2cos2x=tan225 and, solve using transformation method cosx+ root2sinx= root3 THANKS!
24. ### trigonometry

find all degrees solutions to the following equation: sin (A + 50 degrees)=1/square root 2
25. ### Trigonometry

If sin A=3/5 and cosB = 24/25 and angle A and angle B are both in quandrant 1. What is sthe exact value of cos (A-B)?
26. ### Math

Trigonometry Identities problem: Prove the following; (tan^2x)(cos^2x) = (sec^2x - 1)(1-sin^4x) ÷ (1+sin^2x)
27. ### trigonometry

The wheels of a car have radius 11 in. and are rotating at 800 rpm. Find the speed of the car in mi/h. mi/h
28. ### TRIGONOMETRY

Suppose tan theta=15pi/18 is less than theta 3pi/2 , what are the other trigonometric functions?
29. ### Trigonometry

If Cot θ = -Square Root of 15/7, use the fundamental identities to find Cosθ > 0.
30. ### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA
31. ### math trigonometry

Prove that 2sin150*cos315*cos(90-x)/sin(360-x)cos(-240)sin135
32. ### Trigonometry

An automobile tire has a diameter of 36 inches. How many revolution will the wheel make as the automobile travel 1 mile
33. ### Trigonometry

If the terminal side of angle theta passes through point (-3, -4), what is the valuse of sec theta? 1) 5/3 2) -5/3 3)5/4 4)-5/4
34. ### Trigonometry

Determine all the values of theta,0 degrees < or = theta < 360 satisfying csc(x)<0 and cot(x)>0
35. ### Trigonometry

Evaluate arctan(cot10Pi/9) sec(arccos(-1/6) csc(arcsec(5/3) sin(2 arccos(sqrt5/5)
36. ### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA
37. ### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA
38. ### trigonometry

If a locomotive wheel with a diameter of 15 meters rolls 11.25 meters,through how many degrees and minutes does it turns?
39. ### trigonometry

determine the distance between the ladder and the house when its angle of elevation is 63.5 degree and the length of the ladder is 20 ft?
40. ### Trigonometry

simplify: 2sin35 deg times cos35 deg.
41. ### Trigonometry

[sinxcosx/(1+cosx(]-[sinx/(1-cosx)]= -(cotxcosx+cscx)
42. ### trigonometry

If sine of an angle is ¼ and cosine of an angle is 15/4.. find cosecant.
43. ### Trigonometry

Show that cos M(1/cosM-cosM) is equal to sin^2M
44. ### Trigonometry

Where does the graph of y = tan theta intersect the graph of y = -1 where n is any integer?
45. ### trigonometry

in triangle abc, m<c=90, bc=20, and ba=40. a.find sine a b.find measure of <a
46. ### trigonometry

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

Determine sin x - tan x - sin x=0 for 0 ≤ x < 360°
48. ### Trigonometry

Can you verify this identity? cos(4x)cos(2x)= (1/2)[cos8x+cos2x]
49. ### Trigonometry

Solve: 2cos^2 theta - 3cos theta+ 1= 0 interval [0, 2ð)
50. ### Trigonometry

Solve triangle ABC: B= 60 degrees, C= 90 degrees a= 4 feet
51. ### trigonometry

{1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x solve using identities?
52. ### Trigonometry

Prove that cos(A+B)cosC - cos(B+C)cosA = sinBsin(C-A)
53. ### Trigonometry

IfA=340°, prove that 2sinA/2 = -(v1+sinA) + (v1-sinA)
54. ### Trigonometry

how many solutions does the system {y = x, y = tan x have? what is sec^-1 (sec-ð)?
55. ### Trigonometry

Write tan(pi/4 - Beta) as a function of Beta only.
56. ### Trigonometry

Write cos (lambda + pi/3) as a function of lambda only.
57. ### Algebra 2/ Trigonometry

If cos θ = c, then sin²θ/2 equals 1) 1-c/2 2) 1+c/2 3) 1-c/c+c 4) 1-c/4
58. ### Trigonometry

Solve tan2A - 2tanA = -1 for 0º≤A≤360º.
59. ### trigonometry 28

In triangle ABC , if angle c=90°,then prove that sin^2 A+sin^2 B=1.
60. ### TRIGONOMETRY

Express tan theta in terms of cosec theta
61. ### Trigonometry

A=30 degrees, a=9 and b=8. Find the missing sides/angles. I did cos39=x/8 and reduced that to 8cos39=x. I got 6.92. But that's not a valid answer, so I can't go from there. What did I do wrong? Can you show me how to get the other answers as well, please?

the expression cos4x cos3x + sin4x sin3x is equivalent to which one of the following is the answer: 1) sinx 2) sin7x 3) cosx 4) cos7x
63. ### trigonometry

The function d=11cos6t describes a simple harmonic motion, where d is the distance(in meters) an object travels in t seconds. What is the time required for one complete cycle?
64. ### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.
65. ### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.
66. ### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.
67. ### Trigonometry

Find all solutions of 4(sin(x)**2)-8cos (x) -8 = 0 in the interval (2pi, 4pi). (Leave your answers in exact form and enter them as a comma-separated list.)
68. ### trigonometry

how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)
69. ### Trigonometry

Law of Sines sigma=27 deg 30' c= 52.8 a=28.1 Please show two solutions (beta1, beta2,...) due to acute and obtuse angles. Thank you so much for helping!
70. ### College Algebra and Trigonometry

if x = ucos(pi/4) - vsin(pi/4) and y = usin(pi/4) + vcos(pi/4), find A, B and C so that, 5x^2 - 6xy + 5y^2 = Au^2 + Buv + Cv^2. Thanks, I really don't know what to do, I've already used almost 20 sheets of paper. Please help me. Thanks.
71. ### Pre-Calculus (Trigonometry)

An angle in standard position such that sinÈ = 5/13. Determine the possible values of È, to the nearest degree. Answer: I got 23°. (How do I get the second one?)
72. ### Math

I'm in gr 11 doing Trigonometry 14.2 = b ---- ---- sin38 sin 67 a = 46 --- ---- sin20 sin130 (10.7)^2 = (9.5)^2 + (12.4)^2 - 2(9.5)(12.4) cos <B I just need someone to explain this to me because I just don't get it... thank you for any help
73. ### Trigonometry

How do I find all solutions to: tanx+3cotx=4? The answer choices are: a.) x=arctan3+nPi b.) x=arccot3+nPi
74. ### Math

Trigonometry problem: The sides AB and AC of triangle ABC are of lengths 4 and 7 respectively. M is the midpoint of BC. AM is of length 3.5, Find the length of BC.
75. ### trigonometry

A pilot is flying with an air speed of 185mph. Find the ground speed of plane and the direction of flight.
76. ### trigonometry

Use identities to simplify each expression. 1) (sin2t) (cos5t) + (cos2t) (sin5t) 2) {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x
77. ### Trigonometry

A side 2.8m long makes an angle of 25 degrees with the ground how high is the top of the slide above the ground .
78. ### Trigonometry

Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. Please explain.
79. ### Trigonometry

A bicycle with a 26-inch wheel(diameter) travels a distance of 700 feet. How many revolutions does the wheel make?
80. ### trigonometry

the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65^ and 40^ respectively. Find the two legs
81. ### Trigonometry

A bicycle is traveling at 20 feet/second. If the diameter of the wheel is 24 inches, what is the angular velocity in radians/second?
82. ### trigonometry

the angle of elevations from the top of the tree to the point on the ground is 63 yards from its base 45degrees. How tall is the tree?
83. ### Trigonometry

Johns eyes are 6 ft from the ground. He is standing 70 ft away from a tree. If the angle of elevation is 24 degrees, then how tall is the tree?
84. ### Trigonometry

Graph the following functions .include two full periods .a)y=3cos(2x) and b)y=-4sin(4x) on same graph
85. ### trigonometry

a motor boat moves in the direction of N 38° E for 3 hrs at 20 mph. How far north and how far east does it travel?
86. ### Trigonometry- ??????

Solve the equation for 0≤ x ≤ 180 given tan(x) sin^2(x)=2tan(x) How do I do this? Thank you and Merry Christmas! :)
87. ### trigonometry

what is the smalliest positive anglecoterminal of -61 degrees,501,632,1024,-350,721,-0.5 and 512 degrees?
88. ### Trigonometry

A rocket is launched from a tower that is 200 feet high at 1000ft/sec at 48°. How far does the rocket travel?
89. ### trigonometry

if tan theta= 1/2, find the exact values of the five remaining trigonometric functions for theta, which is acute
90. ### trigonometry

The shadow of a vertical tower is 65 ft long when the angle of elevation of the sun is 35 degrees. Find the height of the tower
91. ### math- Trigonometry

If cos degree equals to 0.8641 What is Sin degree? I have no idea how to find this. Please help me. Thank you
92. ### maths trigonometry

solve the equation (cos theta +1)(tan theta minus 1)=0 for solution between 0 and 2pii.
93. ### maths trigonometry,

find all solutions between 0 and 2pii for (tan theta =1)and (cos theta =negative 1/2).
94. ### Calc

Question: Using trigonometry, add these two vectors. 7m/s [N30E] and 2m/s [S17E]. THIS is my answer: 6m/s [N45E] is this the correct answer?
95. ### trig

how come you get different answers if you take different paths in trigonometry? (when you choose to use sin, cos or tan)
96. ### trigonometry

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle
97. ### trigonometry

Find all the angles between 0 degrees and 360 degrees which will satisf y the equation: 5tan^2 y +5 tan y = 2 sec^2 y
98. ### trigonometry

an automobile tire has a diameter of 36 inch.how many revolution will the wheel make an arc the automobile travels 1 mile (5280 A)?
99. ### Trigonometry

What is the period of y = ã3sin (1/3x-ã1/3)? A, 6ƒÎ B. ã3ƒÎ C, 2ƒÎ/3 D. ƒÎ/3 What is tan^-1 ã3/3? A. ƒÎ/6 B. ƒÎ/4 C. -ƒÎ/3 D. -ƒÎ/4 What is the frequency of y = tan (ƒÎ/3 x) ? A. 3 B. 1/6 C. ƒÎ/3 D. 1/3 What is the amplitude of y = 1/5 sin (ã...
100. ### Trigonometry

√3 + 5cos⦸ = 3 cos⦸ Can someone please explain for me how to express the answer in radian measure? Thanks