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March 6, 2015

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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Pre-Calc/Trig
Describe the end behavior for function by writing a limit expression. f(x)=2x^5-x+7
Tuesday, November 11, 2014 at 1:13pm

Precalc/Trig
Sorry there are quite a few problems, but I just need to know if these are correct (and if they aren't, where I went wrong): 1. Solve these equations. tanθ = -√3 θ = 2π/3 + kπ θ = 5π/3 + kπ 2. secθ = √2 θ = π/4...
Tuesday, November 11, 2014 at 8:47am

calc/trig
A 84-ft tree casts a shadow that is 130 ft long. What is the angle of elevation of the sun?
Monday, November 10, 2014 at 8:51pm

trig
Find all angles è between 0° and 180° satisfying the given equation. cos è = 1/9
Monday, November 10, 2014 at 8:46pm

Pre-Calc/Trig
Help please State the x and y-intercepts for each function. f(x)= -x^3+4x
Monday, November 10, 2014 at 2:14pm

Pre-trig/Calc
Please help me. Use Descartes' rule of signs to describe the roots for each polynomial function. 3. m(x)=x^3+3x^2-18x-40
Sunday, November 9, 2014 at 2:22pm

trig
if x is a positive acute angle, then express tan(180+x) as a function of x
Saturday, November 8, 2014 at 6:45pm

Trig
House B is located at a bearing of N67°E from house A. House C is 370 meters from house A at a bearing of S68°E. House B is located at a bearing of N11°W from house C. Find the distance from house A to house B. (Round your answer to two decimal places.) Sorry, I ...
Saturday, November 8, 2014 at 2:13am

Math Trig Please Help!!!
Find exact values for all the solutions to the equation cos theta = sqrt 3/2 for -2pi <= theta <= 2pi Theta = Theta = Theta = Theta =
Friday, November 7, 2014 at 7:00pm

Pre-Calc/Trig
Use Descartes' rule of signs to describe the roots of the polynomial function. m(x)=x^3+3x^2-18x-40
Friday, November 7, 2014 at 4:17pm

Pre-Calc/Trig
Help me please. List all possible rational zeros for the polynomial function. p(x)=3x^3-2x^2-5x-2
Friday, November 7, 2014 at 2:18pm

Math Trig Help
sin theta = x/3, with theta in the first quadrant, find the expression for cos theta and tan theta. Answers will be in algebraic terms of x. Give exact answers with 0 < theta <pi/2 (0 less than or equal to theta, less than or equal to pi/2 Cos theta ? Tan Theta?
Friday, November 7, 2014 at 1:27pm

Trig
A playground slide starts 107cm above the ground and is 250cm long. What angle does the slide make with the ground? Give the answer to the nearest degree.
Wednesday, November 5, 2014 at 10:32pm

TRIG WORD PROBLEMS
from 25 feet away from the base of a building, the angle of elevation from the ground to the top of a building is measured 38 degrees. how tall is the building. WHat i did was put 25 feet on the base of the triangle the angle measurement oppsite and the longer leg x is this ...
Tuesday, November 4, 2014 at 11:52pm

RIGHT TRIANGLE TRIG
a kite is being flown 150 yards of string. the kite has an angle of elevation with the ground 65 degrees. how high above the ground is the kite. I DONT KNOW HOW TO SET UP THE PROBLEM
Tuesday, November 4, 2014 at 4:17pm

Pre-Calc/Trig...
Help me please Is the given linear expression a factor of the polynomial? Show work. f(x)=2x^3+x^2-5x+2; x+2
Friday, October 31, 2014 at 6:12pm

Math/Physics
My question is this: The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no ...
Thursday, October 30, 2014 at 2:45pm

Physics
To move a large crate across a rough floor, you push on it with a force (F) at an angle of 21 degrees below the horizontal. Find the force necessary to start the crate moving, given the mass of the crate is 32 kg and the coefficient of static friction between the crate and the...
Thursday, October 30, 2014 at 2:38am

Trig
I need to the steps to get (1-sinx)(1+sinx)=cos^2 x
Tuesday, October 28, 2014 at 9:22pm

Algebra 2 & trig
joanna invested $7500, part at a 5.5% and the remainder at a 6% annual rate of interest. if she collected a total of 435 in interest at the end of one year, how much money was invested at each rate?
Tuesday, October 28, 2014 at 4:05pm

Trig
A weight is oscillating on the end of a spring. The position of the weight relative to the point of equilibrium is given by y=1/12(cos8t-3sin8t), where y is the displacement (in meters) and t is the time (in seconds). Find the times when the weight is at the point of ...
Monday, October 27, 2014 at 5:28pm

Pre-Calc/Trig
y=-x^2+5x+36 converting into intercept form is this the correct answer? y=(x+9)(x-4)
Monday, October 27, 2014 at 3:28pm

Pre-Calc/Trig
How?? I only know how to convert standard form functions into intercept form, but I do not understand how to do this. Convert the functions into standard form. 1.y=2(x-4)(x+3) 2.y-2=-3(x+4)^2
Monday, October 27, 2014 at 2:10pm

Pre-Calc/Trig
I have looked this up, but still cant figure out what it is.. What is the projectile motion function?
Monday, October 27, 2014 at 1:01pm

Calculus/pre-trig
Write the formula for the discriminant. State the types of roots for a quadratic equation, explaining how the discriminant helps you determine the type.
Saturday, October 25, 2014 at 7:25pm

trig
simplify tan(-17 degree)+sin(24 degree)+cot(73 degrees)+cos(66 degrees in(-24 degree)
Saturday, October 25, 2014 at 5:37pm

Pre-Calc/Trig
How would I solve this one? I just can't get this one. 6x^2+11x-35=0
Saturday, October 25, 2014 at 4:45pm

Pre-Calc/Trig
Have i solved this correctly? x^2+3x-28=0 (x+7)(x-4)=0 x=-7 or 4
Saturday, October 25, 2014 at 4:29pm

Pre-Calc/Trig
How would I solve this? x^2+10x+24=0
Saturday, October 25, 2014 at 2:20pm

Math, Trig/Pre Calc
You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
Friday, October 24, 2014 at 6:06pm

Pre-Calc/Trig...
Help me please Standard form: y=x^2-2x-3 Vertex form: ??? Intercept form: ???
Friday, October 24, 2014 at 5:56pm

Math Trig
I'll do my best to describe this problem. Given A=17 degrees, B=73 degrees , x=q, y=5 and z=r use the figure to find the exact value of q and r x = base y = leg z = hypotenuse a = angle between z and x b = angle between z and y 90 degree angle = between x and y Solve for q...
Friday, October 24, 2014 at 4:23pm

Trig calc
Find the coordinates of the point at -45 degrees on a circle of radius 3.6 centered at the origin. Round your answers to three decimal places.
Friday, October 24, 2014 at 2:18pm

Trig
Find the coordinates of the point at -10 degrees on a circle of radius 2.7 centered at the origin. Round your answers to three decimal places.
Friday, October 24, 2014 at 2:17pm

Math Trig
A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 40 degrees from level ground to the kite string. If she used a full 120-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and the height of the ...
Friday, October 24, 2014 at 1:55pm

Trig calc
A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees =
Thursday, October 23, 2014 at 11:38pm

Trig / Calc
What angle (in degrees) corresponds to 18.96 rotations around the unit circle? Enter the exact decimal answer.
Thursday, October 23, 2014 at 10:20pm

Trig/Pre-Calc...
Please help me with this. The finishing time for a runner completing the 200-meter dash is affected by the tail-wind speed, s. The change, t, in a runner's performance is modeled by the function shown below: t= 0.0119s^2 - 0.308s - 0.0003 Predict the change in a runner'...
Thursday, October 23, 2014 at 5:46pm

Trig
Verify and identify, I am so confused on how to do this? this is an extra credit but I am lost, please help. cot(Ý-ƒÎ/2)=-tan​ Ý
Wednesday, October 22, 2014 at 12:30pm

Pre-Calculous (Trig)
The Singapore Flyer, currently the world's largest Ferris wheel, completes one rotation every 37 minutes.1 Measuring 150 m in diameter, the Flyer is set atop a terminal building, with a total height of 165 m from the ground to the top of the wheel. When viewed from Marina ...
Friday, October 17, 2014 at 9:44pm

Pre-Calc/Trig...
Helpp needed, this is sort of confusing me. Describe the nature of the roots for this equation. 2x^2-x+1=0 A. Two real, rational roots B. Two real, irrational roots C. One real, double root D. Two complex roots
Friday, October 17, 2014 at 1:27pm

Pre-Calc/Trig...
Help me please. Simplify 1. √-36 2. -√-625
Friday, October 17, 2014 at 1:10pm

Pre-Calc/Trig...
Help me please. Solve the equation: (x-3)(x+2)=0 Enter the solution with the lowest value.
Thursday, October 16, 2014 at 1:33pm

Pre-Calc/Trig...
A ball is thrown upward with an initial velocity of 4ft/sec from a height of ten feet. what is the maximum height that the ball will reach. h(t)= -16+vt+s
Wednesday, October 15, 2014 at 8:57pm

Pre-Calc/Trig...
Solve using any method. 1. 2x^2+5x-3=0 2. -x^2+x+1=0
Wednesday, October 15, 2014 at 8:31pm

Pre-Calc/Trig...
Use the discriminant to determine the nature of the roots. 1. 2x^2+5x-3=0 2. -x^2+x+1=0
Wednesday, October 15, 2014 at 7:34pm

Pre-Calc/Trig...
Help me do this please. Simplify the expressions using imaginary numbers. 1. √-16 2. √-49
Wednesday, October 15, 2014 at 7:11pm

Pre-Calc/Trig...
Am I right? Consider the function y=x^2+5x-2. What would happen to the graph if (x - 3) was substituted in place of the x? A. The graph would shift up 3 units. B. The graph would shift down 3 units. C. The graph would shift 3 units to the right. <--- D. The graph would ...
Wednesday, October 15, 2014 at 11:44am

Pre-Calc/Trig...
Help me please. Which of the following accurately depicts the transformation of y=x^2 to the function shown below? y=5(x-2)^2+1 A. Shift 5 units right, stretch vertically by a factor of 2, then shift up 1 unit. B. Shift up 1 unit, stretch horizontally by a factor of 5, then ...
Wednesday, October 15, 2014 at 10:14am

Pre-Calc/Trig...
Am i correct? A vertical shift is an example of a non-rigid transformation. True
Tuesday, October 14, 2014 at 2:46pm

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
Tuesday, October 14, 2014 at 1:23pm

Pre-Calc/Trig...
Am i correct? The graph of y=3x^2-4x+2 opens downwards. FALSE The graph of y=2x^2-4x+2 has a y-intercept of (0,1). FALSE
Tuesday, October 14, 2014 at 12:56pm

Pre-Calc/Trig...
Stuck on these two questions, help me please. The graph of y=3x^2-4x+2 opens downwards. True or False? The graph of y=2x^2-4x+2 has a y-intercept of (0,1). True or False?
Monday, October 13, 2014 at 8:23pm

trig
from a top of a hill
Sunday, October 12, 2014 at 2:03am

Pre-Calc/Trig...
Which of the following quadratic functions has a graph that opens downwards? check all that apply A. y=2x^2-9x+3 B. y=x^2+4x+8 C. y=-(5+2x^2) D. y=60x-15x^2
Thursday, October 9, 2014 at 2:44pm

Pre-calc/Trig...
which of the following are quadratic functions? check all that apply 1. y=2x^2-3x+7 2. y=3x-4 3. y=(5x-3x^2)/4+1 4. y=x-x^3
Wednesday, October 8, 2014 at 1:51pm

Pre-Calc/Trig..
Write a function for the graph described as a transformation of y=x^2 y=x^2 experiences a vertical stretch of factor 2 and then a shift right of 3 units.
Tuesday, October 7, 2014 at 7:04pm

Pre-Calc/Trig...
Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=(x+5)^2
Tuesday, October 7, 2014 at 5:11pm

Pre-Calc/Trig...
Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=x^2+7
Tuesday, October 7, 2014 at 4:36pm

Pre-Calc/Trig...
vertex form:y-4=-(x-4)^2
Monday, October 6, 2014 at 2:25pm

Pre-Calc/Trig...
standard form: y=x^2-4x-5 vertex form: ? intercept form: ?
Monday, October 6, 2014 at 1:09pm

trig
The centers of two belt pulleys, with radii of 3 cm and 6 cm, respectively, are 13 cm apart. Find the total area K enclosed by the belt.
Monday, October 6, 2014 at 8:03am

Pre-Calc/Trig...
if h(x)=(fog)(x) and h(x)=3√x+3 find g(x) if f(x)= 3√x+2
Saturday, October 4, 2014 at 8:16pm

Pre-Calc/Trig...
Assume f(x) = -2x + 8 and g(x) = 3x. What is the value of (f + g)(-1)?
Friday, October 3, 2014 at 6:48pm

Pre-Calc/Trig...
Am i correct? It is possible for a system of linear equations to have no solutions. True <-- False i think it's true, if the lines are parallel?
Friday, October 3, 2014 at 5:47pm

Pre-Calc/Trig...
Which of the following is the equation of a line parallel to the line y = 3x + 2, passing through the point (10,1)? 3x + y = 29 3x - y = 29 -3x - y = 29 3x + y = 29
Friday, October 3, 2014 at 5:16pm

trig
what is the angle of elevation of a 15 foot ladder leaning 12 feet up a building?
Friday, October 3, 2014 at 2:56pm

Pre-Calc/Trig...
Let y = 4t + 2 be a linear function representing the distance from home for an ant t minutes after starting out from a location near its home. What does the number 4 represent in this function? The ant is 4 feet from its home after t minutes. The ant started out 4 feet from ...
Friday, October 3, 2014 at 1:58pm

Pre-Calc/Trig...
If f(x)=1/(x+2), what is f(3+h)? A. 1/(3+h) B. 1/(h+5) C. 1/(x+2)(3+h) D. (3+h)(x+2)
Friday, October 3, 2014 at 1:25pm

algebra2/ trig
The figure at the right shows three circular pipes all with 12inch diameters the have been strapped together by a metal band.What is the lenght of the band? I don't even know where to start , please help?
Wednesday, October 1, 2014 at 8:13pm

Trig
Two planes take off at the same time from an airport. The first plane is flying at 240 miles per hour on a bearing of S 45.0° E. The second plane is flying in the direction S 45.0°W at 290 miles per hour. What is the bearing of the second plane from the first after 5 ...
Wednesday, October 1, 2014 at 6:07pm

Pre-Calculus/Trig...
Help Please For the function defined by: f(x)= (x^2,x≤1) (2x+1,x>1) Define f(0). and also how would i graph f(x)?
Wednesday, October 1, 2014 at 11:06am

Math Pre-Calc/Trig
If 11 square meters of tile are available to make a rectangle whose width must be 6 meters less than its length, what would be the dimensions of the rectangle?
Tuesday, September 30, 2014 at 7:01pm

math- pre calc/trig
Find the length of each side of a square if the diagonal is 7(square root 2)? How do I solve or set up this problem?
Tuesday, September 30, 2014 at 8:05am

Math (Trig)
Rewrite the following expression in terms of tan3x: (sin2x + sin4x)/(cos2x + cos4x)
Monday, September 29, 2014 at 5:32pm

Pre-Calc/Trig
Helpp please State the domain and range of each of the following functions: 1. f(x)=1/(x+3) 2. g(x)=√x+6 3. h(x)=x^3+2x+5
Sunday, September 28, 2014 at 4:36pm

Pre-Calc/Trig
Help Please Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9
Sunday, September 28, 2014 at 3:49pm

Trig
A railroad tunnel is shaped like a semiellipse as shown below. A semiellipse is shown on the coordinate plane with vertices on the x axis and one point of intersection with the positive y axis. The height of the tunnel at the center is 27 ft and the vertical clearance must be ...
Saturday, September 27, 2014 at 2:42pm

trig
karen, (who is 1,6m tall) wishes to calculate the height of a tall tree. she stands 50m from the base of the tree and measures its angle of elevation to be 36 degrees. determine the height of the tree?
Wednesday, September 24, 2014 at 4:26am

Math Precal/Trig
Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.
Thursday, September 18, 2014 at 11:07pm

trig
if 15 sin theta=8 cos theta , then what is sin theta-cos theta/sin theta +cos theta
Thursday, September 18, 2014 at 8:02pm

trig
A bird at the top of a tree looks down on a field mouse at an angle of depression of 65°. If the field mouse is 30 meters from the base of the tree, find the vertical distance from the ground to the bird’s eyes. Round the answer to the nearest tenth.
Thursday, September 18, 2014 at 2:30pm

trig
A planes actual resulting ground speed and direction are 550 mph and N26E. A wind is blowing from the northeast. If the pilot is holding a course of N27E how fast is the wind blowing I'm just stumped. It's an extra credit question is basically why I'm stumped.
Tuesday, September 16, 2014 at 3:23pm

Trig
A planes actual resulting ground speed and direction are 550 mph and N26E. A wind is blowing from the northeast. If the pilot is holding a course of N27E how fast is the wind blowing?
Tuesday, September 16, 2014 at 3:21pm

trig
if acos^3x+3acos.sin^2x=m asin3x+3acos^2x.sin=n proof that-(m+n)^2/3+(m-n)^2/3=2a^2/3
Sunday, September 14, 2014 at 4:54am

trig
proof that (m+n)^2/3+(m-n)^2/3=2a^2/3
Sunday, September 14, 2014 at 4:49am

trig
I have arrived at .322 as the sine of the angle how do I find the actual angle (in decimal/deg)
Saturday, September 13, 2014 at 4:49pm

Trig
Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are 65 degrees and 44 ...
Wednesday, September 10, 2014 at 4:36pm

Trig
Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are 65 degrees and 44 ...
Wednesday, September 10, 2014 at 4:34pm

trig
the 40ft. pole is braced by , a wire from its top in a point 60ft. from its base up, snd 18° slope. how long is the wire?
Wednesday, August 27, 2014 at 7:41am

trig
A spring is attached to the ceiling and pulled 17 cm down from equilibrium and released. After 3 seconds the amplitude has decreased to 16 cm. The spring oscillates 13 times each second. Assume that the amplitude is decreasing exponentially. Find an equation for the distance, ...
Sunday, August 17, 2014 at 8:41pm

trig
bike tires are 22 inches in diameter and has an angular speed of 5 miles per second, how fast is the bike traveling in mph
Friday, August 15, 2014 at 5:20pm

Precalculus/Trig
I can't seem to prove these trig identities and would really appreciate help: 1. cosx + 1/sin^3x = cscx/1 - cosx I changed the 1: cosx/sin^3x + sin^3x/sin^3x = cscx/1-cosx Simplified: cosx + sin^3x/sin^3x = cscx/1-cosx I don't know where to go from there. 2. (sinx + ...
Friday, August 15, 2014 at 12:14pm

Precalculus/Trig
Prove the following identity: 1/tanx + tanx = 1/sinxcosx I can't seem to prove it. This is my work, I must've made a mistake somewhere: Converted 1/tanx: 1/sinx/cosx + sinx/cosx = 1/sinxcosx Simplified 1/sinx/cosx: cosx/sinx + sinx/cosx = 1/sinxcosx Found common ...
Thursday, August 14, 2014 at 8:30pm

trig
the angle of from the top of a 41 fdepression as measured oot tower to a reference point on the ground is 65 degrees. How far away, to the nearest foot, is the reference point from the base of the tower
Thursday, August 7, 2014 at 10:01pm

Math - trig
Determine the general solution of 8 cos^2x - 4cosx - 1 =0 (8cos^2x - 4cosx)/8 =1/8 cos^2x - 4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^-1(5) x = error
Saturday, July 26, 2014 at 12:28pm

trig
two poles of height 25 cm & 20 cm are are parallel to each other with a distance of 12 cm between them. what is the distance between the top of the two poles?
Saturday, July 26, 2014 at 12:48am

trig
In 60 ft. Run sith a 21 degree slope what is rise(ft)
Wednesday, July 16, 2014 at 9:15pm

trig
Wires are attached to a pole to make it more secure. The diagram shows one of those wires having a length of 220 feet. The angle of elevation from the ground to the top of the pole is 36. What is the height of the pole? A. 178.0 ft B. 374.3 ft C. 159.8 ft D. 129.3 ft
Tuesday, July 15, 2014 at 8:05pm

trig
evaluate the expression under the given conditions tan 2 theta; cos theta=7/25, theta in quadrant I
Wednesday, July 9, 2014 at 11:41pm

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