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July 14, 2014

July 14, 2014

**Recent Homework Questions About Trigonometry**

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**trig**

verify the identity. cos2 x - sin2 x = 1 - 2sin2 x the 2's next to the sin and cos on the right sides are powers.
*Tuesday, February 15, 2011 at 3:51pm*

**trig**

A man standing 9 meters above the ground observes the angles of elevation and depression of the top and bottom,of the top of the monument in luneta 6 degrees and 50 minutes and 7 degrees and 30 minutes respectively.Find the height of the monument?
*Tuesday, February 15, 2011 at 12:14am*

**trig**

A man standing 9 meters above the ground observes the angles of elevation and depression of the top and bottom,of the top of the monument in luneta 6 degrees and 50 minutes and 7 degrees and 30 minutes respectively.Find the height of the monument?
*Monday, February 14, 2011 at 11:59pm*

**trig**

At 2 points 95 ft apart on a horizontal line perpendicular to the front of a building, the angles of elevation of the top of the building are 25 degrees and 16 degrees. How tall is the building?
*Monday, February 14, 2011 at 5:50pm*

**trig**

Cos theta= 1/3, find the remaining trigonometric functions of the acute angle theta
*Monday, February 14, 2011 at 10:13am*

**TRIG**

Solve this equation on the interval 0 θ < 2π. Round your answer(s) to two decimal places. 2 sin θ + 3 = 2 (smaller value) (larger value)
*Sunday, February 13, 2011 at 8:03pm*

**college Trig**

Solve this equation on the interval 0 θ < 2π. Round your answer(s) to two decimal places. 2 sin θ + 3 = 2 (smaller value) (larger value)
*Sunday, February 13, 2011 at 7:09pm*

**college Trig**

To find the distance from the house at A to the house at B, a surveyor measures the angle ACB, which is found to be 70°, and then walks off the distance to each house, 50 feet and 70 feet, respectively. How far apart are the houses? feet
*Sunday, February 13, 2011 at 5:58pm*

**Math/Trig**

Write a polynomial of the smallest degree with roots 1, -3, and 4.
*Friday, February 11, 2011 at 1:44pm*

**trig**

Find the altitude of an isosceles triangle whose base in 30 cm vertex angle is 75 degres
*Friday, February 11, 2011 at 1:01am*

**trig**

80 feet from the base of a tower the angle of elevation to the top is 36 degree find the height of the tower
*Friday, February 11, 2011 at 12:57am*

**trig**

find x in DMS if 2sinx-1=cscx
*Thursday, February 10, 2011 at 9:30pm*

**Trig-Value of angle degree**

For the angle degree 0, i don't understand how for sin it's 0 and then for cos it's 1 and then for csc it's undefined. How would I get that algebraically? wouldn't it be just a line so how would I get the different values?
*Thursday, February 10, 2011 at 7:02pm*

**Trig**

Are 120 and -240 coterminal?
*Wednesday, February 9, 2011 at 5:19pm*

**trig**

prove the identity sec^2x times cot x minus cot x = tan x
*Friday, February 4, 2011 at 2:37pm*

**trig**

Tan x cot x -1=1-sec x cos x
*Thursday, February 3, 2011 at 3:38am*

**alg and trig**

6x^3-5x^2+15x+5 / 2x^2-x+3
*Wednesday, February 2, 2011 at 9:29pm*

**trig**

how do you explain y=2 cos(1 half x)
*Tuesday, February 1, 2011 at 3:41pm*

**Algebra 2/Trig**

We just started logarithms and exponential functions, and I'm kind of getting the gist but not really. Here is what I tried on one of the homework problems: 2^X=4^X+1 1)2^X=(2^2)^X+1 2)x=x+1 3)0=1 or no solutions I wasn't sure what to do between steps 1 and 2. Thanks!!
*Sunday, January 30, 2011 at 9:29pm*

**Pre-Calculus-Trig**

A 40 foot high flagpole sits on the side of a hill. The hillside makes a 17 degree angle with horizontal. How long is a wire that runs from the top of the pole to a point 72 feet downhill from the base of the pole?
*Sunday, January 30, 2011 at 8:06pm*

**Pre-Calculus-Trig**

A straight road slopes at an angle of 10 degrees with the horizontal. When the angle of elevation of the sun (from horizontal) is 62.5 degrees, a telephone pole at the side of the road casts a 15 foot shadow downhill, parallel to the road. How high is the telephone pole?
*Sunday, January 30, 2011 at 8:03pm*

**Pre-Calculus-Trig**

A woman on the top of a 448 foot high building spots a small plane. As she views the plane, its angle of elevation is 62 degrees. At the same instant a man at the ground-level entrance to the entrance to the building sees the plane and notes that its an angle of elevation is ...
*Sunday, January 30, 2011 at 8:00pm*

**Pre-Calculus-Trig**

A surveyor stakes out points A and B on sides of a building. Point C on the side of the building is 300 feet from A and 440 feet from B. Angle ACB measures 38 degrees. What is the distance from A to B?
*Sunday, January 30, 2011 at 7:57pm*

**Pre-Calculus-Trig**

Two surveyors, Joe and Alice, are 240 meters apart on a riverbank. Each sights a flagpole on the opposite bank. The angle from the pole to Joe (vertex) to Alice is 63 degrees. The angle from the pole to Alice(vertex)to Joe is 54 degrees. How far are Joe and Alice from the pole?
*Sunday, January 30, 2011 at 7:56pm*

**Pre-Calculus-Trig**

A pole tilts 12 degrees from the vertical, away from the sun, casts a 34 foot long shadow on level ground. The angle of elevation from the end of the shadow to the top of the pole is 64 degrees. How long is the pole?
*Sunday, January 30, 2011 at 7:52pm*

**Pre-Calculus-Trig**

A boat travels for 8 kilometers in a straight line from the dock. It is then sighted from a lighthouse which is 6.5 kilometers from the dock. The angle determined by the dock, the lighthouse(vertex), and the boat is 25 degrees. How far is the boat from the lighthouse?
*Sunday, January 30, 2011 at 7:50pm*

**Pre-Calculus-Trig**

Two trains depart simultaneously from the same station. The angle between the two tracks on which they leave is 120 degrees. One train travels at an average speed of 45 mph and the other at 70 mph. How far apart are the trains after three hours?
*Sunday, January 30, 2011 at 7:47pm*

**Pre-Calculus-Trig**

A lighthouse keeper 100 feet above the water sees a boat sailing in a straight line directly toward her. As watches, the angle of depression to the boat changes from 25 degrees to 40. How far has the boat traveled during this time?
*Sunday, January 30, 2011 at 7:44pm*

**Pre-Calculus-Trig**

A road rises 140 feet per horizontal mile. What angle does the road make with the horizontal?
*Sunday, January 30, 2011 at 7:40pm*

**Pre-Calculus-Trig**

A pilot in a plane at an altitude of 22,000 feet observes that the angle of depression to a nearby airport is 26 degrees. How many miles is the airport from a point on the ground directly below the plane?
*Sunday, January 30, 2011 at 6:19pm*

**Geometry/Trig.**

Let angle A be and acute angle in a right triangle. Approximate the measure of andgle A to the nearest tenth of a degree. cos A = 0.11
*Sunday, January 30, 2011 at 1:53pm*

**Geometry/Trig.**

For acute angle Aof a right triangle, find tan A by using the 45-45-90 Triangle Theorem or the 30-60-90 Triangle Theorem. measure of angle A=45 degrees.
*Sunday, January 30, 2011 at 1:43pm*

**trig**

Given that sin x = - ã2/2 and that cos x is negative, find the other functions of x and the value of x. can you explain how this problem can be solved please.
*Sunday, January 30, 2011 at 12:49am*

**trig**

find the distance from the orgin to each of the following points .If your answer is irrational,leave it in radical form. a.(3,-7) b.(-4,6) c.(0,5) d.(6,0) e.(-2,-4) f.(0,0) my answers : what do they mean by leave it radical form a.sqrt 58 b.Sqrt 52 = 2sqrt 13 or should i just ...
*Saturday, January 29, 2011 at 6:28pm*

**MATH: Pre-Cal/Trig**

The length of a rectangular flower garden is 6 more feet than its width. A walkway 3 feet wide surrounds the outside of the garden. The total area of the walkway itself is 288 square feet. Find the dimensions of the garden.
*Saturday, January 29, 2011 at 5:20pm*

**trig**

convert to degrees, minutes and seconds 3pi/2 radians can u plz help
*Thursday, January 27, 2011 at 4:55pm*

**trig**

simplify (3x^2-5x+4)-(5x^2+7x-7)
*Thursday, January 27, 2011 at 9:08am*

**Trig**

The diameter of the wheels on your car (including the tires) is 25 inches. You are going to drive 305 miles today. Each of your wheels is going to turn by an angle of how many degrees.
*Thursday, January 27, 2011 at 12:37am*

**trig**

a plane is flying at an altitude of x with the distance at 800 meters with an angle of 70 degress. what equation would you use to solve. tan70= x/800 tan70= 800/x sin70= x/800
*Wednesday, January 26, 2011 at 2:15pm*

**Trig **

Boston is 200 mi away from NY. It takes me 1 hour less to drive to Boston when I drive 10 mi faster than my normal rate. What is my normal rate?
*Tuesday, January 25, 2011 at 10:00pm*

**trig**

sinx+cosxcot=csc
*Tuesday, January 25, 2011 at 6:45pm*

**trig**

What are the values of theta in the interval 0 less than or equal to theta is less than 360 that sastify the equation sin theta - 1/2 =0?
*Tuesday, January 25, 2011 at 10:42am*

**trig**

find all values of x on interval 0-2pi. (sin4x)(cos7x)=(cos4x)(sin7x) identities should be used.
*Monday, January 24, 2011 at 2:56pm*

**Pre-Cal: Trig**

The point (7,2) determines a position angle "t". Find the exact value of sin(t).
*Sunday, January 23, 2011 at 11:54pm*

**Pre-Cal: Trig**

The point (7,2) determines a poistion angle "t". Find the exact value of sin(t).
*Sunday, January 23, 2011 at 11:53pm*

**trig**

A kite is flying overhead at an angle of elevation is 28. If the kite string is 10m long, what is the horizontal that the kite is flying away from you?
*Sunday, January 23, 2011 at 11:28pm*

**trig**

To calculate the height of a cliff, a surveyor takes the following measurements. The cliff's shadow is 12m, while at the same time a meter stick has a shadow of 2m. Draw a diagram and find the height of the cliff.
*Sunday, January 23, 2011 at 11:25pm*

**trig**

given the point (x, 4/7) on the unit circle where x is less then
*Saturday, January 22, 2011 at 9:37am*

**math (trig)**

if cos 2 theta = -(1/3) and theta is in Quadrant 2, find sin theta, cos theta, tan theta, and draw triangle theta
*Thursday, January 20, 2011 at 11:41pm*

**trig**

If sin 2 theta = (2/5) in Quadrant 2, find sin theta, cos theta, tan theta, and draw triangle theta.
*Thursday, January 20, 2011 at 11:29pm*

**Trig. Math**

The mean score on a normally distributed exam is 42 with a standard deviation of 12.1. Which socre would be expected to occur less than 5% of the time? 1) 25 2) 32 3) 60 4) 67 -I know the answer is 67, but i dont know why .. PLEASE help!
*Thursday, January 20, 2011 at 7:44pm*

**trig/precalc**

a plane flies 810 miles form Franklin to Centerville with a bearing of 75 degrees (clockwise from north). then it flies 648 miles from centerville to rosemont with a bearing of 32 degrees. find the straight-line distance and bearing from rosemont to franklin.
*Thursday, January 20, 2011 at 7:16pm*

**trig**

True or false? If A and B are angles of a triangle such that A > B, then cos A > cos B.
*Thursday, January 20, 2011 at 7:02pm*

**Trig**

Find the exact value of sin75degrees+ sin15degrees.
*Thursday, January 20, 2011 at 3:34pm*

**Trig**

Solve:cos^2x=1 for 0 < x is less than or equal to 2pi
*Thursday, January 20, 2011 at 3:34pm*

**Trig**

Hi everyone, I have a WS due tomorrow, and would really appreciate some help. You are taking a ride on a Ferris wheel that is 100 feet in diameter and has a bottom point that is 10 feet above the ground. Suppose that the wheel rotates four times every minute and from your ...
*Thursday, January 20, 2011 at 3:16pm*

**Trig**

Solve: cos2x(2cosx+1) for 0degrees is less than or equal to x is equal to or less than 360degrees
*Thursday, January 20, 2011 at 3:05pm*

**Math/Trig**

Solve: sin x - 2sin x cos x = 0 for 0 is less than or equal to x is less than 2pi.
*Thursday, January 20, 2011 at 3:02pm*

**Math/Trig**

Solve: sin2 x = cos2 x for 0 degrees is less than or equal to x is less than 360 degrees.
*Thursday, January 20, 2011 at 3:01pm*

**Math/Trig**

Solve: 2 sin x - 1 = 0 for 0 degrees is less than or equal to x is less than 360 degrees.
*Thursday, January 20, 2011 at 2:58pm*

**Trig**

Verify:cos(360degrees-x)=cos x
*Thursday, January 20, 2011 at 2:54pm*

**Trig**

Verify that 7pi/6 is a solution to 2sin2x–sinx=1.
*Thursday, January 20, 2011 at 2:52pm*

**Trig**

Verify the identity: tanx/secx-1=secx+1/tanx
*Thursday, January 20, 2011 at 2:51pm*

**Math/Trig**

Solve: 2 cos2 x - 3 cos x + 1 = 0 for 0 is less than or equal to x is less than 2pi.
*Thursday, January 20, 2011 at 2:39pm*

**Math/Trig**

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.
*Thursday, January 20, 2011 at 2:38pm*

**Math/Trig**

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.
*Thursday, January 20, 2011 at 2:37pm*

**math trig identities**

a)cos4x-sin4xcot2x=-1 b)1+sinx+cosx/1+sinx-cosx=cot(x/2) i tried to ask my teacher but she doesnt know please help me!
*Thursday, January 20, 2011 at 11:03am*

**trig**

cos A = -4/5 for angle A in Quadrant II, find sin 2A
*Thursday, January 20, 2011 at 2:55am*

**trig**

cos A = -4/5 for angle A in Quadrant II, find sin 2A
*Thursday, January 20, 2011 at 2:55am*

**trig/functions**

what does y=2 sin (x-pi/ .5) -1 look like on a graph with the 3 phases of the function?
*Wednesday, January 19, 2011 at 10:50pm*

**trig**

the question is: given sec x = 4, tan x < 0, find sin(2x), cos(2x)and tan (2x)
*Wednesday, January 19, 2011 at 6:40pm*

**trig**

i have to find a & c, b=2.489*10 to the nineth power and i have one degree 25
*Tuesday, January 18, 2011 at 9:10pm*

**trig**

A ladder leans against a house at a point 19 feet high. The ladder is 25 feet long. What is the measure of the angle formed by the ladder against the house?
*Monday, January 17, 2011 at 10:29pm*

**trig**

is there a lowest or least cosine of a triangle with sides of 4,5,and 6? such as: .78, .72...
*Monday, January 17, 2011 at 10:08pm*

**Math/Trig**

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.
*Monday, January 17, 2011 at 4:04pm*

**Math/Trig**

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.
*Monday, January 17, 2011 at 3:29pm*

**trig**

sorry -- here it is simplify this expression : (x^3 y)/(y^(1/2) x^(-2) ) when x is not = 0, and y is not equal to 0 thank you
*Monday, January 17, 2011 at 3:39am*

**trig**

(x^3 y)/(y^(1/2) x^(-2) )
*Monday, January 17, 2011 at 3:36am*

**trig**

Ido not understand why the rt triangel was in ratio of 1:√3:2 in Sue's question where in triangle abc c isthert angle and sin a √3/2 - find csc b-please explain where the 1 comes from
*Monday, January 17, 2011 at 3:20am*

**Math/Trig**

Find the area of the sector, given a central angle of 55degrees and a radius of 5.7 in. Round your answer to the nearest tenth.
*Sunday, January 16, 2011 at 4:29pm*

**Math/Trig**

Find the length of the intercepted arc with radius 2.5 cm and a central angle of 95degrees. Round your answer to the nearest tenth.
*Sunday, January 16, 2011 at 4:28pm*

**trig**

When the sun's angle of elevation is 30 degree the shadow of a post is 6 ft longer than when the angle is 45 degree. find the height of the post
*Sunday, January 16, 2011 at 2:33am*

**Math/Trig**

Find the linear velocity of an object, 3 cm away from the center, rotating on a circular object with an angular velocity of 0.56 rad/sec. Round your answer to the nearest tenth.
*Friday, January 14, 2011 at 1:24pm*

**Math/Trig**

Find the angular velocity of an object, rotating on a circular object, moving through 9.7 revolutions in 11 seconds. Express your answer in rad/sec and round your answer to the nearest tenth.
*Friday, January 14, 2011 at 1:22pm*

**Math/Trig**

Find the area of a sector of a circle with a radius of 3 m and a central angle of 125degrees.
*Friday, January 14, 2011 at 1:06pm*

**Math/Trig**

The following is a table for the maximum temperature per month, for Boulder, CO Month|° F Jan:45.1 Feb:48.2 Mar:53.8 Apr:62.8 June:71.6 July:81.5 Aug:85.1 Sept:76.6 Oct:66.7 Nov:52.9 Dec45.5 Find the sinusoidal function that models this data. How do I do this ?
*Friday, January 14, 2011 at 11:47am*

**Math/Trig**

The average temperature, in °F, for Atlanta, GA is modeled by the sinusoidal function y = 18.25 sin(pi/6 t - 2.09) + 61.15 where t is the time in months and January is t = 1. What is the average temperature for the month of February? How do I do this problem ? Please Help
*Friday, January 14, 2011 at 11:00am*

**Algebra 2 Trig Honors**

logof3(x-1)+ logof3(3x-1)=2
*Thursday, January 13, 2011 at 7:06pm*

**math/trig**

I have two questions as I review for a test tommorow, any help is much appreciated!! Solve: 1) 4sin^2x=2cosx+1 2) cscx+cotx=1
*Thursday, January 13, 2011 at 6:24pm*

**math/trig**

I have two questions as I review for a test tommorow, any help is much appreciated!! Solve: 1) 4sin^2x=2cosx+1 2) cscx+cotx=1
*Thursday, January 13, 2011 at 6:24pm*

**Math/Trig**

Given A=56degrees, C=61degrees, and b=10.5, solve triangle ABC. If no triangle exists, explain why. If two solutions exist, write both. Round your answer to the nearest tenth
*Thursday, January 13, 2011 at 2:04am*

**Math/Trig**

Given A=56degrees, C=61degrees, and b=10.5, solve triangle ABC. If no triangle exists, explain why. If two solutions exist, write both. Round your answer to the nearest tenth
*Wednesday, January 12, 2011 at 7:41pm*

**Help please Trig**

Given sinθ=0.76, find θ in degrees to the nearest tenth.
*Wednesday, January 12, 2011 at 7:39pm*

**Math/Trig**

Find the length of the intercepted arc, given a central angle of 3pi/5 and a radius of 4.5 cm. Round your answer to the nearest tenth.
*Wednesday, January 12, 2011 at 7:30pm*

**Trig/Math**

f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function. Amplitude:1/3 Period:?????? Phase Shift:??????? Vertical Shift:+4 Please Help ?
*Tuesday, January 11, 2011 at 9:18pm*

**Trig/Math**

f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function. Amplitude:1/3 Period:?????? Phase Shift:??????? Vertical Shift:+4 Please Help ?
*Tuesday, January 11, 2011 at 6:50pm*

**Trig/Math**

3. f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function please.
*Tuesday, January 11, 2011 at 5:51pm*

**Trig**

f(x) = -cos(3x + pi). Find the amplitude, period, and phase shift of the function.
*Monday, January 10, 2011 at 7:48pm*

**Trig/Math**

Write the equation of the cosine function with an amplitude of 1, a period of 3pi/7, a phase shift of -pi/5, and a vertical shift of 2 units down.
*Monday, January 10, 2011 at 6:25pm*

**Trig/Math**

2. f(x) = 1/4 cos(1/2 x + pi/2). Find the amplitude, period, and phase shift of the function. 3. f(x) = -cos(3x + pi). Find the amplitude, period, and phase shift of the function.
*Monday, January 10, 2011 at 5:47pm*

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