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October 25, 2014

October 25, 2014

**Recent Homework Questions About Trigonometry**

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**trig**

ABC is an isoscele triangle in which [AB]=[AC]=5cm and [BC]=6cm. Calculate [AM], where M is the mid-point of BC.
*Saturday, March 26, 2011 at 7:22pm*

**Trigonometry**

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your answer. True or False: For ...
*Thursday, March 24, 2011 at 3:03pm*

**Trigonometry**

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your answer. True or False: For ...
*Thursday, March 24, 2011 at 2:46pm*

**Trig**

Solve: (2/y+2)+(3/y)=(-y/y+2)
*Tuesday, March 22, 2011 at 11:51pm*

**Trig**

(2/y+2)+(3/y)=(-y/y+2)
*Tuesday, March 22, 2011 at 10:15pm*

**trig**

Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)
*Tuesday, March 22, 2011 at 7:30pm*

**trig**

Prove that sin squared 20 degrees+sin squared 40 degrees+ sin squared 80 degrees is equal to 3/2
*Tuesday, March 22, 2011 at 3:18pm*

**trig**

Rewrite as a function of a quadrant 1 angle. cos152
*Tuesday, March 22, 2011 at 9:42am*

**trig, Phoenix College**

Where did the number 0.5736 come from or originated from? Will the horizon be closer or farther away when your eyes are closer to the surface? Will the horizon be closer or farther away when your eyes are farther from the surface?
*Monday, March 21, 2011 at 10:59pm*

**math - trig**

Given the coordinates of the terminal side of an angle in standard position, find the value of sine, cosine, and tangent: (-4,0)
*Monday, March 21, 2011 at 10:10pm*

**verfying trig identity**

1+Cosx 1-Cosx _______ - _______ = 4CotxCscx 1-cosx 1+Cosx
*Monday, March 21, 2011 at 7:01pm*

**trig**

determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a
*Sunday, March 20, 2011 at 11:46am*

**trig**

if sina,cosa,tana are in geometric progression then prove that cot^6a-cot^2a=1
*Sunday, March 20, 2011 at 11:40am*

**trig**

For each expression in column I, choose the expression from column II to complete an identity: Column I Column II 1. -tanxcosx A. sin^2x/cos^2x 2. sec^2x-1 B. 1/sec^2x 3. sec x/cscx C. sin(-x) 4. 1+sin^2x D.csc^2x-cot^2x+sin^2x 5. cos^2 x E. tanx I figured #1 is C, #2 is A, ...
*Saturday, March 19, 2011 at 9:52pm*

**trig**

draw the graph of 4sin(x+30) and 2+tanx for values of x from 0 degree to 360degree and obtain the solution within the range of the equation 4sin(x+30)-tan x=2
*Saturday, March 19, 2011 at 5:38pm*

**trig**

{Given: cos(A)=\frac: sqrt{203}/{18} {Find: tan(A) Find the positive value of the above in simplest radical form.
*Saturday, March 19, 2011 at 2:54pm*

**trig**

The number of a fraction is three more than twice the denominator. The fraction simplified is equal to 9/4 Find the fraction
*Wednesday, March 16, 2011 at 10:37pm*

**trig**

Bob throws a ball straight up with an initial speed of 50 feet per second from a height of 6 feet. (a) Find parametric equations that describe the motion of the ball as a function of time. (Do this on paper. Your instructor may ask you to turn in this work.) (b) How long is ...
*Tuesday, March 15, 2011 at 9:02pm*

**trig**

1/4tan(2x)
*Tuesday, March 15, 2011 at 5:18pm*

**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
*Monday, March 14, 2011 at 7:00pm*

**Trig**

Finding all Solutions for 2cos(x)-ã3=0
*Monday, March 14, 2011 at 6:38pm*

**Trig**

sin^2x/sec^2x-1
*Monday, March 14, 2011 at 6:37pm*

**Trig**

Find all values of theta in the interval 0 <= theta < 360 that satisfy the equation 3cos(2theta)=7cos(theta). Express answers to the nearest ten minutes.
*Monday, March 14, 2011 at 6:30pm*

**trig**

prove that (sin^4x-cos^4x)/(sinx-cosx) = sinx+cosx
*Saturday, March 12, 2011 at 9:00am*

**Trig **

If the terminal side of theta in standard position contains the point (5,8). Find the exact value of tan of theta
*Thursday, March 10, 2011 at 8:36pm*

**Trig **

Given that theta is a quadrant 3 angle with cos of theta=-7radical65/65, determine tan of theta
*Thursday, March 10, 2011 at 8:21pm*

**trig **

if cot of theta is less than zero, and csc of theta is less than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:06pm*

**trig**

if sin of theta is less than zero and cos of theta is greater than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:06pm*

**trig**

if csc of theta is greater than zero and sec of theta is less than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:05pm*

**trig**

if than of theta is greater than zero and cos of theta is greater than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:03pm*

**Algebra and Trig**

Aldo has feet of fencing. He will use it to form three sides of a rectangular garden. The fourth side will be along a house and will not need fencing. What is the maximum area that the garden can have?
*Thursday, March 10, 2011 at 1:16pm*

**trig**

solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)
*Wednesday, March 9, 2011 at 9:04pm*

**Math (Trig.)**

A boat sailing from A to B travels in a straight line until the captain realizes he is off course. The boat is turned through an angle of 60 degrees, then travels another 10 km to B. The trip would have been 4 km shorter if the boat had gone straight from A to B. How far did ...
*Wednesday, March 9, 2011 at 7:47pm*

**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 degrees ...
*Wednesday, March 9, 2011 at 3:38pm*

**trig**

I need to state the period and 2 consecutive asymptotes on the graph for the following questions. 1: y = -3 tan pi*x period: pi (?) asymptotes: ? 2: y = 2 sec 4x period: ? asymptotes: ? 3: y = csc (x/3) period: ? asymptotes: ? 4: y = 3 cot (pi*x/2) period: ? asymptotes: ? If ...
*Wednesday, March 9, 2011 at 9:28am*

**trig**

A surveillance satellite circles the earth at a hight of h miles above the surface. Suppose that d is the distance, in miles, on the surface of the earth that can be observed from the satellite. find an equation that relates to central angel (theta) to the hight h.
*Tuesday, March 8, 2011 at 11:23am*

**Trig**

What is the phase shift of y=6cos(6x+pi/2)?
*Monday, March 7, 2011 at 11:24am*

**trig**

tanx sin^2x capital sigma [0,2p]
*Sunday, March 6, 2011 at 10:34pm*

**trig**

give and exact value for cos(2pi/3)
*Sunday, March 6, 2011 at 9:41pm*

** Trig**

If = 58° and m = 120 in, what is the value of n to the nearest tenth of an inch?
*Sunday, March 6, 2011 at 9:30pm*

**trig**

with its arm fully extended to a length of 16ft, the maximum height that a man lift can reach is 18ft. The lowest height is 4ft, what is the position where the arm of the lift is horizontal. a) if a man gets on the lift and the arm is lifted through an angle 15degrees,what ...
*Sunday, March 6, 2011 at 5:49pm*

**trig**

if theta is an angle in standard position and B(-3,4) is a point on the terminal side of the angle, what is the value of sin theta?
*Sunday, March 6, 2011 at 12:13pm*

**trig**

Suppose the tangent of an acute angle in a right triangle is less than 1. How does the side opposite the angle compare to the side adjacent to the angle?
*Saturday, March 5, 2011 at 6:07pm*

**trig**

using the given point (9, squareroot 19) find the value of cosx
*Friday, March 4, 2011 at 11:39am*

**Trigonometry**

Solve the following trig equations. Give all positive values of the angle between 0 degrees and 360 degrees that will satisfy each. Give any approximate value to the nearest minute only. 3 sin è - 4 cos è = 2 Can you please help me with this one.
*Thursday, March 3, 2011 at 11:14pm*

**Geometry/trig**

How do I find the geometric mean between 12 and 2.4?
*Thursday, March 3, 2011 at 10:56pm*

**Trigonometry**

use the appropriate trig identity (sum and difference, half angle, double angle) to find the exact value. 1)cos 255 degrees 2) sin 165 degrees 3) tan 285 degrees
*Thursday, March 3, 2011 at 7:55pm*

**trigonometry (please double check this)**

Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. a.) ( I got confused doing this 1 can you help me with it.) 3 sin theta - 4 cos theta...
*Thursday, March 3, 2011 at 5:34pm*

**trigonometry (please double check this)**

Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. 1. sin2ƒÆ = (sqrt 3)/2 2. sin^2ƒÆ = cos^2ƒÆ + 1/2 3. ...
*Thursday, March 3, 2011 at 6:32am*

**trig**

Richard is flying a kite. The kite string makes an angle of 57 degrees with the ground. If Richard is standing 100 feet from the point on the ground directly below the kite , find the length of the kite string
*Wednesday, March 2, 2011 at 11:16pm*

**trig**

y=sin pie divied by 2 theta
*Wednesday, March 2, 2011 at 10:38pm*

**trig**

covert polar equation r = 6/(2-3sinè) to rectangular equation
*Wednesday, March 2, 2011 at 3:53am*

**Trig**

Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation
*Tuesday, March 1, 2011 at 5:23pm*

**algebra/trig**

solve: ln12x = 6
*Tuesday, March 1, 2011 at 3:03pm*

**trig**

if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.
*Sunday, February 27, 2011 at 5:19pm*

**Math (Trig)**

a ferris wheel has a radius of 10m and is one meter above the ground. If the ferris wheel makes 1 revolution every 20 seconds, write an equation that gives the height above the ground of a person on the ferris wheel as a function of time if that person starts (t=0) 1/8th of a ...
*Sunday, February 27, 2011 at 9:51am*

**algebra2/trig**

the length of a rectangle is 2x+4/(x^2-9) and its width is 3/(x-3). express the perimeter of the rectangle as a single fraction in simplest form.
*Saturday, February 26, 2011 at 11:21am*

**algebra2/trig**

for what are value of k are the roots of 3x^2-6x+k=0 equal?
*Saturday, February 26, 2011 at 11:19am*

**algebra2/trig**

tina can paint a room in 8 hours, but when she and her friend emily work together, they can complete the job in 3 hours. how long would it take emily to paint the room alone?
*Saturday, February 26, 2011 at 11:18am*

**trig**

an art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with sting. What would be the radian measure of the angle between two adjacent pieces of string, in simplest form?
*Thursday, February 24, 2011 at 4:28pm*

**algebra 2**

I have a question about two problems that I am trying to solve for my h.s. trig. class. The first one I believe is correct. the other i am lost. D(p)= 2000-60p S(p)=460+94p p is the price in dollars a) find those values of p for which demand exceeds supply 2000-60P > 460 + ...
*Tuesday, February 22, 2011 at 6:46pm*

**trig**

"Two points A and B on the circle x^2 + y^2 = 49 form a central angle of 30 degree with the radii draw to them. Find the length of the arc AB in term of pi?"
*Tuesday, February 22, 2011 at 12:14pm*

**Pre-cal/Trig**

(tan/(1+sec)) + ((1+sec)/tan) = 2csc (Show all work please.)
*Monday, February 21, 2011 at 9:44pm*

**trig**

Suppose that q is in standard position and the given point is on the terminal side of q. Give the exact value of the indicated trig function for q.
*Monday, February 21, 2011 at 11:50am*

**Trig**

find the exact value of the expression using the provided information. Find Tan (S+T) given that cos s=1/3 with s in quad I and sin T= -1/2 with T in quad IV
*Saturday, February 19, 2011 at 11:21pm*

**Trig**

find the exact value of the expression using the provided information. Find Tan (S+T) given that cos s=1/3 with s in quad I and sin T= -1/2 with T in quad IV
*Friday, February 18, 2011 at 10:36pm*

**Trig**

tan 75 (show all work please)
*Friday, February 18, 2011 at 9:42pm*

**trig**

How do I find the exact value of sin2x when secx is equal to the negative square root of three
*Friday, February 18, 2011 at 5:00pm*

**Trig**

find (s+t) given that cos s=1/3 with s in quad I and sin T=-1/2 with t in quad IV
*Friday, February 18, 2011 at 1:43pm*

**trig**

From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the river.how wide is the river?
*Thursday, February 17, 2011 at 3:35pm*

**trig**

A BILLBOARD PAINTER HAS BEEN ASSIGNED THE TASK OF CHANGING THE ADVERTISMENT ON A 20-FT BILLBOARD,THE BOTTOM OF WHICH IS 15FT OFF THE GROUND.AFTER EXAMINING THE SITE, SHE IDENTIFIES TWO AREAS ON THE GROUNG UNDER THE SIGN THAT ARE STURDY ENOUGH TO SUPPORT HER LADDER. ONE ARE IS ...
*Thursday, February 17, 2011 at 4:46am*

**trig**

sin(-π) + cos 5π how to solve without a calculator. Please write steps and explain thank you
*Wednesday, February 16, 2011 at 10:51pm*

**trig**

cos θ = (2√(2)) / (3) sin θ = - (1/3) then what would the triangle look like, the placement of the sides on quadrant 1,2,3, or 4?
*Wednesday, February 16, 2011 at 8:01pm*

**trig**

how would I know what csc 450 degrees ? I know that csc is hypotenuse over opposite, but then when I graph this the opposite is the hypotenuse so how am i supposed to solve it?
*Wednesday, February 16, 2011 at 5:20pm*

**Trig**

The angle of elevation to the top of a building from a point on the ground is 39 degrees. From a point 50 feet closer to the building, the angle of elevation is 48 degrees. What is the height of the building?
*Wednesday, February 16, 2011 at 10:02am*

**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*

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