Monday

January 23, 2017
Number of results: 75

**Trigo!**

Ok, i did this maths trigo question, that says sinx-cos=2/3. I squared it on both sides to get sin2x=5/9 and did the sum. In the end i got two solutions, 16.9 and 73.1. However, when i substituted the answers back into the equation, only one of the 2 answers was correct! The ...

*September 19, 2009 by help!*

**Math trigo**

Tan 660'

*September 10, 2016 by Anonymous*

**TRIGO**

Find the minimum value of 9Tan^2x + 4Cot^2x.

*June 3, 2011 by anandi*

**trigo**

Can i have a solution on how i can derive on this answer 4cos^3x - 3 cos x.....please..

*September 28, 2014 by rai zan*

**trigo**

what is the basic way to study this topic??i mean trigonometery......it's kinda difficult

*November 20, 2009 by Michael*

**trigo**

A 50 m tree casts a shadow of 60 m . Find the sun's angle of elevation at that time.

*January 16, 2015 by dimwit*

**math/trigo**

A 22 ft flagpole casts a 62 ft shadow. Calculate the angle of elevation to the sun

*January 24, 2016 by Anonymous*

**Math-Trigo**

if sinA=-(12/13) and -90<A<0, find without using calcuator, the value of cot(90-A)

*November 6, 2016 by AlexMaths*

**Math-Trigo**

if sinA=-(12/13) and -90<A<0, find without using calcuator, the value of cot(90-A)

*November 6, 2016 by AlexMaths*

**trigo**

The terminal side of angle θ lies on the line y=-mx for m>0 and x>0.calculate the values of the trigonometric function

*July 8, 2014 by tiq*

**trigo**

how do i verify these? 1-sin^2B 1. ----------- = csc^2B-sec^2B sin^2Bcos^B 2. cos(2a+a) = 4cos^3a-3cosa

*December 13, 2008 by anjelica318*

**trigo**

4.2x2-1.2x6-0.018x5 divided by -6x4 =? 18y3-5y12-7y11 divided by 3/2y =?

*July 26, 2010 by weakin*

**TRIGO**

prove the ff: a.) sin(x/2) - cos(x/2) = +-sqrt(1 - sin(x)) b.) tan(x/2) + cot(x/2) = 2csc(x) HELP PLEASE!!

*May 1, 2016 by Henry Morgan*

**trigo**

Use a half measure identity to find the exact value.. Cos t= 1/3 and 0 <t<1/2 pie find sin 1/2 t..

*September 28, 2014 by rai zan*

**trigo**

Use a half measure identity to find the exact value.. Cos t= 1/3 and 0 <t<1/2 pie find sin 1/2 t..

*September 28, 2014 by rai zan*

**trigo**

the L and C State building is 1,250 m tall. What is the angle of elevation of the top from a point on the ground 1,760 m from the base of the building?

*July 31, 2010 by trigofunctions*

**trigo**

The L and C State Building is 1,250 m tall. What is the angle od elevation of the top from a point on the ground 1,760 m from the base of the building?

*August 1, 2010 by trigofunctions*

**trigo**

calculate the amount of each annuity of the last deposit.A deposit of $450 at the end of each month period of 5 years at 6.5% compounded semi annually.

*June 9, 2009 by dora*

**trigo**

Because of the wind, a boat sails 4,728 meters in the direction S 47deg29mins W. How far south it goes? How far west has it gone?

*August 3, 2010 by trigofunctions*

**Trigo**

A point on the ceiling of a room is 12ft. from each of the vertices of a triangle on the floor whose legs are 6ft. A and 8ft. respectively. find the length of the ceiling

*May 1, 2016 by Nanny*

**Trigo**

Two observers on opposite sides are 350m apart and are looking at a balloon if the angles of elevation from each observer are 30degree and 60degree respectively,how high is the balloon?

*January 31, 2015 by Dend*

**trigo**

find the period, amplitude,zeros, extreme points at maximum and minimum of the given function: 1.y = sin( -2x) 2.y = 4 sin( 5x) 3.y = -3 sin (3x/5) 4.y = 1/2 cos (-4x)

*February 8, 2015 by rhine*

**trigo**

calculate the amount of each annuity of the last deposit.A deposit of $450 at the end of each month period of 5 years at 6.5% compounded semi annually.If you don't have my email how i am going to recerive the answer?

*June 9, 2009 by dora*

**ccs trigo**

A pilot is flying at a heading of 96° at 225 miles per hour wind is blowing from the south west at a heading of 37° find the ground speed and courses of the plane

*September 14, 2014 by mark*

**trigo**

from the top of a cliff 126m high, the angle of depression of a boat is 20.7deg. how far is the boat from the foot of the cliff?

*July 31, 2010 by trigofunctions*

**trigo**

a bridge is 10 meters above the original ground n assumed to be level. How far from the end of the bridge, an approach starts, if the approach is to have a 10 percent grade?

*July 31, 2010 by trigofunctions*

**trigo**

a bridge is 10 meters above the original ground n assumed to be level. How far from the end of the bridge, an approach starts, if the approach is to have a 10 percent grade?

*August 1, 2010 by trigofunctions*

**trigo**

A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

*November 21, 2015 by carl*

**maths trigo**

prove that sin(n+1)A-sin(n-1)A/cos(n+1)A+2cos(nA)+cos(n-1)A=tanA/2

*September 30, 2012 by ankita*

**trigo**

In a right tringle,/_ABC has a value of 37 degree while its opposite side is equal to 5,where angle c=90 degree find: a.) Remaining sides of the triangle b.) /_ABC using any trigonometry functions

*July 12, 2011 by William john*

**Trigo**

Two men travelling in opposite directions at the rate 18 and 22 miles per hour respectively started at the same time from the same place. In how many hours will they be 250 miles apart?

*June 28, 2012 by Alice*

**trigo**

A television antenna is on the roof of a building. From a point on the ground 36.0 ft from the building the angle of elevation of the top and bottom of the antenna are 51° 23' & 42°10', respectively. How tall is the antenna?

*January 17, 2016 by fabbzz*

**Trigo**

A belt connects two pulley, one of radius 5 inches and the other 18 inches. Through how many revolutions will the smaller pulley make if the larger pulley makes 6 rev?

*August 17, 2016 by Cjanito*

**trigo**

Points A and B are on the same horizontal line from the foot of a hill and the angles of depression of these points from the top of the hill are 30deg and 22deg, respectively. If the distance between A and B is 75m, what is the height of the hill?

*August 3, 2010 by trigofunctions*

**trigo**

0 point midway between two objects one lying three times as far as the other one, the c of elevation of the taller is twice the smaller c of elevation. find the c of elevation?

*July 30, 2015 by osep*

**trigo**

Two points, A and B, are 526 meters apart on a level stretch of road leading to a hill. The angle of elevation of the hilltop from A is 26deg30mins, and the angle of elevation from B is 36deg40mins. How high is the hill?

*August 3, 2010 by trigofunctions*

**trigo**

two points A and B are 562 meter apart on a level stretch of road leading to a hill . the angle of elevation from A is 26degree 30minutes, and angle of elevation from B is 36degee 40minutes. how high is the hill ?

*January 12, 2015 by jilline*

**Trigo**

From the top of the mountain 30m. Above the sea level, the angle of depression of two ships lying in a vertical plane with a mountain top measure 28° and 23°. Find the distance between the ships.

*July 26, 2016 by Sid*

**TRIGO HELP!!! NEEDED NOW**

sec^4x - sec^2x = tan^4x + tan^2x

*December 2, 2011 by NEED HELP NOWW!!*

**trigo**

Obtain an identity for the first function value in terms of the second function value. cos 3x ; cos x

*September 28, 2014 by rai zan*

**trigo**

from the top of 90 meters high building it is observe that the top of another building make a 40 degree angle depression. if two buildings 75 meters apart how tall is the other building?

*October 18, 2011 by jayson austria*

**trigo**

The pilot of an airplane left A and flew 200 miles in the direction S 20deg20mins W. He then turned and flew 148 miles in the direction S 69deg40mins E. If he now heads back to A, in what direction should he fly?

*August 3, 2010 by trigofunctions*

**trigo**

In a right tringle ,angle ABC has a value of 37 degree while its opposite side is equal to 5,where angle c=90 degree Find A.)Remaining sides of the triangle B.)Angle ABC using any trigonometry Functions

*July 12, 2011 by William john*

**Trigo**

a ship sails due north from port 90 km,than 40 km east and then 70 km north, how far is the ship from port

*January 31, 2015 by Dend*

**trigo**

a tugboat is 36km due north of lighthouse C. Lighthouse B is directly east of lighthouse C. The lighthouses are 53km apart. Find the bearing og lighthouse B from the tugboat and the distance of lighthouse B from the tugboat.

*August 2, 2010 by trigofunctions*

**trigo**

A pendulum of length 10 cm has swung so that theta is the radian measure of the angle formed by the pendulum and a vertical line .Show that the number of centimeters in the vertical height of the end of the pendulum above its lowest position is 20 sin squared 1/2 theta...

*September 28, 2014 by rai zan*

**Trigo**

A vertical pole is standing on a slope that is inclined at an angle 8 degrees to the horizontal and casts a shadow that is 82 ft. long down the slope. How tall is the pole if the angle of elevation of the sun is 28 degrees?

*September 16, 2014 by Nik*

**trigo**

A passenger on a ship sailing north at 5.0 mph noticed that at noon a radio tower on land was due east of the slip. At 1:30pm, the bearing of the tower from the ship was S 35deg E. How far was the ship from the tower at 1:30pm?

*August 3, 2010 by trigofunctions*

**trigo help!**

1. differentiate cos(3/x) 2. differentiate sin(4/x) 3. differentiate 3/{sin(3x+pi)} 4. differentiate pxsin(q/x)where p and q are constants. 5. differentiate xsin(a/x) where a is constant 6. differentiate sec^3(3x^2+1)

*June 19, 2009 by I'm stumped*

**trigo**

a peak is sighted at an angle of 27 degree 45 min. 1000ft nearer its angle of elevation is 31 degree 30 min.find the height of the peak

*November 30, 2014 by chel*

**trigo**

please po help me. A chimney projects 6 feet above the roof. At a point 10 feet 8 inches down the roof from the base of the chimney,the chimney subtends an angle of 17°40' . find the angle at which the roof is inclined to the horizontal.

*November 4, 2015 by sam*

**MATH TRIGO-PLSSS ANSWER CLEARLY COZ IM VERY LOW IN**

A TOWER AND A MONUMENT STAND ON A LEVEL PLANE.THE ANGLES OF DEPRESSION OF THE TOP AND BOTTOM OF THE MONUMENT VIEWED FROM THE TOP OF THE TOWER ARE 13DEGREE AND 31 DEGREE,RESPECTIVELY;THE HEIGHT OF THE TOWER IS 145 FT. FIND THE HEIGHT OF THE MONUMENT.

*March 9, 2014 by mier*

**trigo**

the front wheel of a bicycle has a diameter of 16 in and the back wheel has a diameter of 26 in. through what angles does the front wheel turn if the rear wheel turns through 24 radians?

*December 28, 2012 by jane*

**math trigo**

alfa+bita = thita & tan x ratio tan y= x ratio y then prove that sin alfa- bita = x- y ratio x+y sinthita

*June 14, 2016 by mehnaj*

**trigo**

in a right triangle XYZ where right angle at angle X, if z= 14 and angle Y = 27.7 degree. Find angle Z, side x and side y.

*February 21, 2011 by sheosono*

**trigo**

A ship sails N 27°10' E for 39 km and then turns N 67°50' for 85 km. What isad the distance and the bearing of the ship from the starting point? >>>So, I have a sketch of one triangle(not a right triangle, then drew 3 right triangles all over it then solved for ...

*January 15, 2015 by june*

**trigo**

A submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21deg with the surface. a. If it goes for 300 meters along its download path, how deep will it be? What horizontal distance is it from its starting point? b. How many meters must it go...

*August 3, 2010 by trigofunctions*

**trigo**

A television tower stands on the top of the building from point 83.7 feet from the base of the building the angles of elevator to the top and the base of the tower are 63.20 minutes and 38.51 minutes respectively. How tall is the tower?

*October 18, 2011 by jayson austria*

**trigo**

An airplane travels on a bearing of 245 degrees at an airspeed of 200 kilometers per hour while a wind is blowing 50 kilometers per hour from 140 degrees. Find the ground speed of the airplane and the direction of its track, or course, over the ground.

*September 16, 2014 by thomas*

**Trigo**

Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b in terms of sinx and cosx. I don't know what i'm supposed to do, and i don't come to an answer! Help, thanks! my workings: tan(45+x)= (1+tanx)/(1-tanx) a/b = (1+tanx)/(1-tanx) a(1-tanx)=b(1+tanx) i square both ...

*September 26, 2009 by Marrion*

**trigo**

a crane at the edge of a dock is supported by a cable 15 meters long, attached to the dock 9 meters long from the base of the crane. if the crane is 6 meters long, what is the acute angle that the crane arm forms with the horizontal?

*August 14, 2014 by layton*

**trigo**

A space shuttle pilot flying toward the Suez Canal finds that the angle of depression on one end of the canal is 38.25deg and the angle of depression to the other end is 52.75deg. If the canal is 100.6 mi long, find the altitude of the space shuttle.

*August 3, 2010 by trigofunctions*

**trigo**

a bicycle has a front wheel with a diameter of 24cm and a back wheel with a diameter of 60cm. through what angle does the front wheel turn if the back wheel turns through 12 radians

*November 5, 2014 by anna*

**trigo**

A block bordering Sapphire Street is a right triangle. You start walking around the block, taking 125 paces on Sapphire Street and 102 paces on Diamond Street. a. At what angle do Diamond and Sapphire Streets intersect? b. How many paces must you take on Gold Street to ...

*August 2, 2010 by trigofunctions*

**Trigo**

From a window of a building A, the angle of elevation of the top of building B is 35 degrees and the angle of depression of the bottom of building B is 20 degrees. If the buildings are 25m. horizontally apart, Compute for height of the window from the ground? And compute for ...

*March 6, 2011 by Elmo*

**Trigo help!**

Ok, i've tried this question, and it brings me to no answers. Please help! Prove the following: secY(1+tanY)=6cosecY my workings: LeftHandSide: secY + tanY/cosY = 1/cosY + sinY/cos^2Y =(cosY+sinY)/cos^2Y = ??? How should i attempt this question?? Am i even on the right track? ...

*September 19, 2009 by help!*

**trigo**

to calculate the height of the tower david measured the angle of elevation of the top of the tower from point A to B 42degrees. He moved then 30meter closer to the tower and from the point B the angle of elevation to the top of the tower to be 50degree. Determine the height of...

*January 12, 2016 by love*

**trigo**

Scientist estimate the heights of features on the moon by measuring the lenghts of the shadows they cast on the moon's surface. From a photograph, you find that the shadow cast on the inside of a crater by its rim is 325 meters long. At the time the photograph was taken, the ...

*August 2, 2010 by trigofunctions*

**trigo**

how do i do this question? a tower stands on top of a cliff. at a distance of 55m from the foot of the cliff, the angles of elevation of the top of the tower as well as the cliff are 60degrees and 45degrees respectively. what is the height of the tower? Draw a figure. Convince...

*March 12, 2007 by holly*

**Trigo**

A flagpole 12.5m high stands at the top of a bldg. From a pt. P on the street the angle of elevation of the top of the pole is 54 degrees and the angle of elevation of the foot of the pole is 46 degrees. How high is the bldg.?

*January 31, 2015 by Why?*

**trigo--help!**

how do i do this question? a ladder length 13m rests against a vertical wall with its foot on a horizontal floor at a distance of 5m from the wall. when the top of the ladder slips down a distance of x, the foot of the ladder moves out x. find the distance of x. a^2 + b^2 = c^...

*March 12, 2007 by holly*

**trigo**

An observer at A looks due north and sees a meteor with an angle of elevation of 70deg. At the same instant, another observer 30 miles east of A, sees the same meteor and approximates its position as N 50deg W but fails to note its angle of elevation. Find the height of the ...

*August 3, 2010 by trigofunctions*

**Trigo!**

Ok, i've tried this sum a million times and i cant get an answer. Somebody please check my workings and tell me what i did wrong! Thanks! Given 4≤y≤6, find the value of y for which 2cos((2y)/3) + √3 = 0 Here's my workings: 2.666≤(2y/3)≤4 2cos(2y/3...

*September 19, 2009 by help!*

**trigo**

A surveyor made the two sections of the railroad bridge, both at 210 meters in length. Suppose that the maximum angle of elevation of each section is 75deg. When the bridge is closed, the water level is normally 13 meters below the bridge. a. When the bridge is fully opened, ...

*August 3, 2010 by trigofunctions*

**trigo math**

7. Prove that tan B sin B + cos B = sec B. 11. Prove that tanλ cos^2λ +sin^2λ/sinλ = cos λ + sin λ. 12. Prove that 1+tanθ/1+tanθ = sec^2θ+2tanθ/ 1-tan^2θ. 21. Prove that sin^2w-cos^2w/ tan w sin w + cos w tan w = cos...

*December 13, 2012 by RUDY*

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