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October 23, 2014

October 23, 2014

**Recent Homework Questions About Trigonometry**

Post a New Question | Current Questions

**trig**

as the sun rises it casts a long shadow over a boy who is leaning next to a tree. the tree is 35 feet tall and the sun's rays create an angle of depression of 70 degrees with the top of the tree. how long is the shadow
*Monday, October 17, 2011 at 9:15am*

**trig**

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)(If someone had helped me with the ...
*Monday, October 17, 2011 at 1:31am*

**trig**

A hill rises from the horizontal at 15º. The road leading straight up the hill is 800 meters long. How much higher is the top of the hill than the base of the hill? Round to the nearest meter. (Enter only the number.)
*Sunday, October 16, 2011 at 10:31pm*

**Trig**

Factor and simplify the expression. 1-sin^3 x
*Sunday, October 16, 2011 at 3:29pm*

**trig**

Alan is using the equation mg sin A = umg cos A to determine the coefficient of friction, u, between a flat rock and a metal ramp. Find u to the nearest hundredth, if the rock begins to slide at 19º.
*Sunday, October 16, 2011 at 3:32am*

**Trig**

Find the exact value of tan 5pi/12 using the half-angle identity.
*Saturday, October 15, 2011 at 6:39pm*

**alg2/trig**

The expression a/a-b + b/b-a is equivalent to a) 1 b)-1 c) ab/a-b d)a+b/a^2-b^2 please help!
*Thursday, October 13, 2011 at 8:36pm*

**trig**

evaluate cos 12*pi
*Thursday, October 13, 2011 at 11:10am*

**trig**

To the nearest degree, determine the measure of angle X for each value of tan X a. tan X = 0.49 Just not sure how to solve these questions
*Wednesday, October 12, 2011 at 11:38pm*

**trig**

tan x = n tan y, sin x = m sin y then prove that m^2-/n^2-1 = cos^2x
*Wednesday, October 12, 2011 at 5:03am*

**trig**

THE SIDE OF A RIGHT-ANGLED TRIANGLE ARE 3XCM,3X-1CM AND 4X PLUS 1CM ,THE LAST SIDE BEING THE HYPOTHENUS FIND X.
*Tuesday, October 11, 2011 at 10:01pm*

**trig**

Find the exact value by using a half-angle identity. cos 22.5 degrees
*Tuesday, October 11, 2011 at 9:19pm*

**trig**

Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities.
*Tuesday, October 11, 2011 at 8:54pm*

**trig**

Given that sin theta= 3/5 and the terminal side is in quadrant II, find tan (pi/2 - theta)
*Tuesday, October 11, 2011 at 8:06pm*

**trig**

PERIMETER OF A RECTANGLE IS 32CM AND AREA IS 55CM FIND THE LENGHT.
*Tuesday, October 11, 2011 at 6:48pm*

**trig**

Find tanx if sinx = 3/4 and x is in quadrant II.
*Tuesday, October 11, 2011 at 1:45pm*

**trig**

Consider the angle in standard position whose measure is radians. The terminal side of this angle is in the third quadrant and lies on the line given by y=10x. Find sin and cos.
*Monday, October 10, 2011 at 5:18pm*

**trig**

A rocket is launched at an angle of ascent (elevation) of 18 degrees. When it has traveled 6000 ft, what is its height above the ground?
*Sunday, October 9, 2011 at 10:40pm*

**trig**

a tower standing on level ground is due north of piont N and due west of point W, a distance 1,500 feet from N. If the angles of elevation of the top of the tower as measured from N and W are 8 and 11, respectively, find the height of the tower.
*Sunday, October 9, 2011 at 5:14pm*

**trig**

I have to factor the expression and use fundamental identities: sins^2xcscx^2-sin^2x sec^4x-tan^4x
*Friday, October 7, 2011 at 9:32pm*

**trig**

evaluate the expression below at t=4 p=$400 and r=-9% round youre answer 2 decimal place
*Friday, October 7, 2011 at 12:38am*

**trig**

in a circle of radius 26, find the length of the arc spanned by a central angle of pi/4 radians. round your answer to 2 decimal places. use 3.1416 as an approx for pi.
*Wednesday, October 5, 2011 at 8:38pm*

**trig**

Triangle PQR is congruent to P'Q'R. If PQ= x+y, P'Q'+10, Q'R'= 3x-y, and QR=14, then what is x and y?
*Wednesday, October 5, 2011 at 8:17pm*

**trig**

Solve for ¥è in the equation tan ¥è = 2.42 when 180¨¬ < ¥è < 360¨¬. Round your answer to the nearest tenth of a degree. (Enter only the number.)
*Wednesday, October 5, 2011 at 4:51pm*

**trig**

Solve sin ¥è = -0.204 for 90¨¬ < ¥è < 270¨¬. Give your answer to the nearest tenth of a degree.
*Wednesday, October 5, 2011 at 3:36pm*

**trig**

what is the hietgh difference between 2 walls 6 metres apart to get a 17.5 degree pitch
*Tuesday, October 4, 2011 at 2:53pm*

**trig**

if cot 17 degrees = 3.2709, find tan 73 degrees
*Tuesday, October 4, 2011 at 10:25am*

**trig**

1-cos/1+cos= 2(cosec-cot)
*Monday, October 3, 2011 at 12:08am*

**trig**

Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 decimal places.
*Sunday, October 2, 2011 at 5:12pm*

**alg2/trig**

Which expression is defined for all real numbers? a) x + 3/x^2 b) 5/(x + 2)^2 c)4/(x − 2)^2 d)7/x^2 + 3
*Sunday, October 2, 2011 at 3:12pm*

**trig**

Graph y=-2sin(x/2-pi/2)+3
*Sunday, October 2, 2011 at 10:45am*

**trig**

Question Part Points Submissions Used The angle of elevation to the top of a very tall Building is found to be 7° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building.
*Sunday, October 2, 2011 at 4:44am*

**trig**

Triangle XYZ has vertexes at X(-4, 5), Y(-3, 5), and Z(-3, 4). Find the measure of angle Y to the nearest degree.
*Saturday, October 1, 2011 at 10:02pm*

**trig**

The captain of a ship at sea sights a lighthouse which is 120 feet tall. The captain measures the the angle of elevation to the top of the lighthouse to be 19 ^\circ. How far is the ship from the base of the lighthouse?
*Saturday, October 1, 2011 at 11:19am*

**trig**

Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) cos θ = 1/7
*Friday, September 30, 2011 at 12:46pm*

**trig**

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 4 mi apart, to be x = 27° and y = 53°, as shown in the figure. (Round your answers to two decimal places.) (a) Find the distance of the plane from point A. mi (b) Find ...
*Friday, September 30, 2011 at 12:35pm*

**trig**

All solutions in interval [0,2pi) of cosine theta plus one equals zero
*Thursday, September 29, 2011 at 6:22pm*

**trig**

All solutions in interval [0,2pi) of cosine theta plus one equals zero
*Thursday, September 29, 2011 at 6:21pm*

**trig**

A cashier is unsure whether a group of customers ordered and ate a large or a medium pizza. Medium pizzas have a diameter of 12 inches and large pizzas have a diameter of 16 inches. All that remains is one crust that has an arc length of 4.25 inches. All pizzas are divided ...
*Wednesday, September 28, 2011 at 7:00pm*

**trig**

From a point 45 meters above level ground, a surveyor measures the angle of depression of an object on the ground at 68°. Approximate the distance from the object to the point on the ground directly beneath the surveyor. (Round your answer to two decimal places.)
*Wednesday, September 28, 2011 at 4:54pm*

**trig**

Cos(2x+30)-Sin(3x-20)
*Wednesday, September 28, 2011 at 5:33am*

**trig**

Find a cofunction with the same value as sin 19 degrees
*Tuesday, September 27, 2011 at 5:55pm*

**trig**

Find all values of x in the interval [0, 2π] that satisfy the equation. 6 sin2(x) = 3
*Tuesday, September 27, 2011 at 5:13pm*

**trig**

Suppose that the point P(13,-30) is on the terminal side of the angle theta in standard position. What is sin(theta)? Give your answer to the nearest thousandth
*Tuesday, September 27, 2011 at 2:56pm*

**trig**

Suppose that the point P is the point on the unit circle that is associated by the wrapping function with the number 31. In which quadrant is the point P located?
*Tuesday, September 27, 2011 at 2:56pm*

**Trig!**

The identities cos(a-b)=cos(a)cos(b)sin(a)sin(b) and sin(a-b)=sin(a)cos(b)-cos(a)sin(b) are occasionally useful. Justify them. One method is to use rotation matricies. Another method is to use the established identities for cos(a+b) and sin (a+b).
*Tuesday, September 27, 2011 at 12:21pm*

**maths**

in right angled triangle ABC, angleBis90 degree and C is an acute angle of60degree. Also sin m<C=c/b. Find the following trig ratios.(a)mBC/mAB (b)cosec30degree
*Tuesday, September 27, 2011 at 9:07am*

**Alg/2 Trig**

Given the functions f(x)=-x^2+7 and g(x)=3x+4 find f(g(-5)) Write the composition above using an alternative notation.
*Monday, September 26, 2011 at 10:44pm*

**trig**

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?
*Monday, September 26, 2011 at 6:23pm*

**Trig**

Given sin theta = -3/5 and 0 is in quad 2, find Cos theta and tan theta
*Wednesday, September 21, 2011 at 10:19pm*

**Trig**

The point (-5/12) is on the terminal side of an angle theta in standard position. Find Sin theta, cos theta and tan theta Thank You!
*Wednesday, September 21, 2011 at 10:18pm*

**trig**

A woman standing on a hill sees a flagpole that she knows is 65 ft tall. The angle of depression to the bottom of the pole is 14°, and the angle of elevation to the top of the pole is 18°. Find her distance x from the pole. (Round your answer to one decimal place.)
*Wednesday, September 21, 2011 at 3:13am*

**TRIG**

THE SIN COS SEC TAN COT CSC 5X+Y=0
*Tuesday, September 20, 2011 at 6:19pm*

**Calculus**

2sin(2theta) + sqrt(3) = 0 interval (0,2pi) How do I solve this? I thought about maybe subtracting the sqrt(3) from both sides, so that i would have 2sin(2theta) = -sqrt(3) Then maybe dividing by two? sin(2theta) = -sqrt(3)/2 Am I doing anything right here? It's been a ...
*Tuesday, September 20, 2011 at 11:47am*

**trig**

Sketch the graph of f(x)=sin(x+30 degrees) and g(x)=cos2x in the same system of axis [-180 degrees;180 degrees]
*Monday, September 19, 2011 at 12:02pm*

**trig**

Given the radius of a wheel is 12inches and the angular speed is measured to be 3pie/4 radiant per second, find the linear speed of the piece of gum stuck to the where. Give both an exact answer. And a decimal answer rounded to 4 decimal places.
*Saturday, September 17, 2011 at 10:45pm*

**trig**

An automobile windshield washer 10inches long rotates an angle of 60degrres. If the rubber part of the blade only covers the last 9inches of the wiped, find the area of the windshield cleaned by the wiper.
*Saturday, September 17, 2011 at 10:42pm*

**trig**

A space shuttle 200 miles above the earth is orbiting the. Earth once every 6 hours. how far does the shuttle travel in one hour? Note the radius of earth about 4000 miles.
*Saturday, September 17, 2011 at 9:19pm*

**Trig**

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!
*Friday, September 16, 2011 at 4:44pm*

**Trigonometry**

Solve. 2sin(2ƒÆ) + ã3 = 0 interval [0, 2ƒÎ) How do I start this? I feel like maybe Trig Identities, but I'm not really sure.
*Friday, September 16, 2011 at 12:26pm*

**Trig**

how do i find the exact value of s [pie/2, pie] sin s = radical2/ whole number 2 what is s in radians? how do i figure this out without the use of a calculator. I drew the graph and located it in the second quadrant and i think the triangle is a 45-45-90 but i don't how to...
*Thursday, September 15, 2011 at 10:27pm*

**Math trig.**

find the length of the arc intercepted by a central angle of 35 degree 28' in a circle of radius 15ft....i cant figure out how to get it ??
*Thursday, September 15, 2011 at 2:47pm*

**trig**

find the 5 trig ratios when sin theta = -5/13 and lies in quadrant 3
*Wednesday, September 14, 2011 at 10:38pm*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 at 4:08pm*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 at 4:07pm*

**Pre-Calc/Trig**

Please check the first and help with the second-thank you Find all possible rational roots of f(x) = 2x^4 - 5x^3 + 8x^2 + 4x+7 1.I took the constant which is 7 and the leading coefficient which is 2 and factored them 7 factored would be 7,2 2 factored would be 2,1 used 7 as ...
*Monday, September 12, 2011 at 10:53am*

**TRIG**

A 5.5 ft tall woman casts a 6.2 ft shadow. Find the angle of elevation of the sun.
*Sunday, September 11, 2011 at 7:23pm*

**trig**

how do you factor completely.. 18x^2+3x-3?
*Sunday, September 11, 2011 at 6:52pm*

**trig**

What's the general solution for 3sin^2x+sinxcosx=2
*Saturday, September 10, 2011 at 4:56pm*

**trig**

2x+5y+3=0 what is the value of sin theta
*Saturday, September 10, 2011 at 10:27am*

**trig**

whats the horizontal distance traveled by a model rocket launched with an intitial speed of 120 feet per second when the rocket is launched at an angle of 60 degrees
*Friday, September 9, 2011 at 11:31am*

**trig**

tan ø = 5; Quad I How do I find the other 5 function values?
*Friday, September 9, 2011 at 7:09am*

**trig**

find the exact values of the six trig functions of the angle. -750 sin(-750)= cos(-750)= tan(-750)= csc(-750)= sec(-750)= cot(-750)= I've tried this question over and over again and i cannot get it right. i believe -750 is in the fourth quadrant but I'm not sure. can ...
*Tuesday, September 6, 2011 at 11:54pm*

**trig**

find a value of interval in degrees cotalpha=1.3692847 alpha=0.023903 is that correct?
*Tuesday, September 6, 2011 at 9:20pm*

**Trig**

Using tables or a calculator, find tan 16 degrees 15 + cot 32.7 degrees to the nearest hundreths
*Tuesday, September 6, 2011 at 9:04pm*

**trig**

find the value of alpha cotalpha=1.3692847 is 0.023903 correct?
*Tuesday, September 6, 2011 at 8:57pm*

**trig**

find reference angle 111degrees and -105 does it equal =75? i don't know the first one
*Tuesday, September 6, 2011 at 8:28pm*

**trig**

suppose theta is in the interval (90,180 degrees) find the sign of csc(-theta) is it positive or negative = positive???
*Tuesday, September 6, 2011 at 8:25pm*

**trig**

use a calculator to find the decimal approx. (roud 8decimal places) : sec28°6' does it equal 1.13362379 or 87.99624264 ???
*Tuesday, September 6, 2011 at 8:12pm*

**trig**

a tree casts a shadow 36 ft long. at the same timem the shadow cast by a vertical 7 ft pole is 4ft long. find the hight of the tree
*Tuesday, September 6, 2011 at 6:47pm*

**trig**

a tree casts a shadow 36 ft long. at the same timem the shadow cast by a vertical 7 ft pole is 4ft long. find the hight of the tree
*Tuesday, September 6, 2011 at 6:41pm*

**Pre-Calc/Trig**

Please help-I'm stuck really bad What are the roots of the equation x^2 - 4x + 3 = 0 I think I was suppose to use b^2 - 4ac so it would be -4 - (-4)*1*3 = 12 so the roots would be 12 and -12 Thank you for any help you can provide
*Tuesday, September 6, 2011 at 5:05pm*

**trig**

log(x-15)-2=-logx
*Tuesday, September 6, 2011 at 12:19pm*

**trig**

log4+log(x-7)=2
*Tuesday, September 6, 2011 at 11:57am*

**trig**

the length of the base of an isosceles triangle is 30.42 inches. each base is 26.54 degrees. find the length of the two equal sides of the triangle to the nearest hundredths. i get 15.19. is that right?
*Tuesday, September 6, 2011 at 3:59am*

**trig**

find all values of theta in the interval (0,360) that have the given value: sintheta= √2 ______ 2
*Tuesday, September 6, 2011 at 3:54am*

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to get the answer.
*Monday, September 5, 2011 at 7:27pm*

**Pre-Calculus/Trig Check please and help**

Could someone please check the first one and help me with the second one. I'm stuck-Thank you 1.What are theroots of the following polynomial equation? (x+2i)(x-5)(x-2i)(x+8) = 0 I think the roots are -2i,5,2i,-8-you take out the roots as opposites of what are in the ...
*Monday, September 5, 2011 at 8:52am*

**Trig**

Use linear velocity to find out how many miles per hour Jethro's truck is going. In 15 seconds, Jethro's truck's 24-inch diameter tires rotated 101 times.
*Sunday, September 4, 2011 at 7:03pm*

**trig**

cos(arccsc(-20)) Im not allowed to have a decimal answer
*Sunday, September 4, 2011 at 9:57am*

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) Sec^-1(-sqrt2) Tan^-1(-sqrt3) Tan^-1(sqrt3)
*Saturday, September 3, 2011 at 4:46pm*

**trig**

Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function. Sec^-1(-2) sec^-1(-sqrt2) Cos^-1((-sqrt3)/2) Tan^-1(-sqrt3) Could someone explain how to get the answer as well please.
*Saturday, September 3, 2011 at 3:57pm*

**trig**

If sin T = 1/2, then the value of sinT ( sinT - cosecT ) is
*Saturday, September 3, 2011 at 8:26am*

**trig**

how would i graph 3sec(x + (pi/2))
*Friday, September 2, 2011 at 10:21pm*

**Trig**

Find the exact value of each of the following using reference angles. a)sin 225degrees b) cot 120degrees
*Friday, September 2, 2011 at 8:43pm*

**trig**

Derive the identity 1 + cot ^2 theta = csc^2 theta by dividing x^2 + y^2 = r^2 by y^2
*Thursday, September 1, 2011 at 10:27pm*

**trig**

if cos(theta) equal -3/4 find sin(2theta)
*Thursday, September 1, 2011 at 9:29pm*

**Trig**

find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?
*Thursday, September 1, 2011 at 9:16pm*

**trig**

a propeller turns at 300 rpm. Find the angular speed in rad/sec and the linear speed at the tip if the tip to the center is 30cm
*Thursday, September 1, 2011 at 12:35pm*

**Trig**

assume A= alpha using complementary rule how do I solve for alpha? cos(2A+40) =sin(3A-60) I don't understand how to start the question. What are the steps in solving for alpha. Do i get cos to equal sin somehow?
*Thursday, September 1, 2011 at 2:11am*

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