Monday
September 1, 2014

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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Trig
A vertical tower is on a 12° slope. from a 50 m down the hill, the angle of elevation of the top of the tower is 30°. find the height of the tower
Tuesday, April 15, 2014 at 4:03pm

HELP!
Next year (sophomore year) I'm taking the following courses: Honors Algebra II/Trig Spanish III Health AP Biology Honors English AP World History Is AP Bio and world history hard? or no it's not just the exam. Please tell me because this is my first year taking AP.
Monday, April 14, 2014 at 8:00pm

trig
A car is on a driveway that is inclined 12 degrees to the horizontal. A force of 470lb is required to keep the car from rolling down the driveway. a) Find the weight of the car b) Find the force the car exerts against the driveway
Monday, April 14, 2014 at 3:44pm

trig/ vectors
Points C and D are directly across from each other on opposite banks of a river. A boat travels across the river directly from point c to point d at a speed of 12 mph. If the current of the river has a speed of 4 mph, at what angle, and speed, must the captain head to travel ...
Sunday, April 13, 2014 at 8:46pm

trig
Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
Friday, April 11, 2014 at 10:50am

trig
Given angle x,where 0 <= x <= 360 (degrees) solve for to the nearest degree. a)cos(2x) = 0.6420 b)sin(x + 20) = 0.2045 c)tan(90 - 2x) = 1.6443
Friday, April 11, 2014 at 10:42am

trig
Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
Friday, April 11, 2014 at 10:39am

trig
Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
Friday, April 11, 2014 at 10:38am

trig
A and B are positive acute angles. if sin A=4/5 and cos B=8/17 find the value of tan (A-B) is the answer =43/100
Thursday, April 10, 2014 at 5:26pm

trig
An airplane has air speed of 540 mph and a heading of 50*. The wind is blowing from the north at 27 mph. Find the plane's ground speed and course direction.
Thursday, April 10, 2014 at 3:57pm

trig
Use standard identities to express sin(2θ+π/3) in terms of sinθ and cosθ
Thursday, April 10, 2014 at 8:20am

trig
a plane is 50000 ft in the air and 30000 ft from an airport find the angle of depression from the plane to the airport
Wednesday, April 9, 2014 at 7:02pm

algebra 2/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?
Wednesday, April 9, 2014 at 10:34am

trig
cscx+1/cscx cosx = secx+tanx
Tuesday, April 8, 2014 at 5:06pm

maths Pls help trig
1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0<B<90 , prove that 4cos2B+3sin2B=4 4.Prove ...
Tuesday, April 8, 2014 at 11:01am

MathS triG
1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0<B<90 , prove that 4cos2B+3sin2B=4 4.Prove ...
Tuesday, April 8, 2014 at 10:51am

Math - Int Trig
Given the functions: f(x)=2x+2 g(x)=3/x^2+2 h(x)=sqrt(x-2) Find the following 1) (f∘g)(-5) 2) (h∘g)(3) 3) (g∘h)(-2) 4) (g∘g)(-2) 5) (f∘h)(12) Find the following and state the domain: 6) h∘g 7) f∘g 8) g∘f 9) g∘g 10)g∘h
Thursday, April 3, 2014 at 7:43pm

trig
Help! Ships A and B leave port at the same time and sail on straight paths making an angle of 60 degrees with each other. HOw far apart are the ships at the end of 1 hour if the speed of ship A is 25 km/h and that of ship B is 15 km/h?
Wednesday, April 2, 2014 at 6:18pm

trig
a hot air balloon climbs continuously along a 30° angle to a height of 5,000 feet. To the nearest tenth of a foot, how far has the balloon traveled to reach 5,000 feet? Draw a sketch and then solve.
Tuesday, April 1, 2014 at 5:51pm

trig
The ferris wheel in an amusement park. It has a diameter of 24m, and it takes 40s to make one complete revolution. If Peter gets on a gondola which is vertically below the centre of the ferris wheel, find his rise in the height after 5s.
Monday, March 31, 2014 at 8:54am

Trig
If 0 ≤ x ≤ 2π, which equation is a line of symmetry for the graph of y = cos x? x = 0 x = 2π x = π y = 0
Sunday, March 30, 2014 at 1:04am

Trig
On the same set of axes, sketch and label the graphs of the equations y = cos 2x and y = –2 sin x in the interval 0 ≤ x ≤ 2π. How many values of x in the interval 0 ≤ x ≤ 2π satisfy the equation –2 sin x – cos 2x = 3? A.1 B.2 C....
Sunday, March 30, 2014 at 1:03am

Trig
In ΔABC, a = 19, c = 10, and m∠A = 111. Which statement can be used to find the value of C?
Saturday, March 29, 2014 at 9:52pm

Trig
What is the total number of solutions for the equation 3 tan^2 A + tan A – 2 = 0 in the interval. 0 ≤ A ≤ π?
Saturday, March 29, 2014 at 9:51pm

Trig
If the period of a cosine function is 1/3 what is the frequency of the function?
Saturday, March 29, 2014 at 9:50pm

trig
A plane is flying due south at a speed of 192 mph. a wind is blowing in at 53 degrees at 13 mph. what is the bearing of the plane?
Thursday, March 27, 2014 at 10:09am

Trig Identities
Explain why Sin of theta= -The square root of 1-cos^2 theta is not an identity, using either graphical or numerical reasoning.
Tuesday, March 25, 2014 at 6:40pm

trig
tan^2(5x)cos^4(5x) = 1/8 - 1/8cos(20x)
Monday, March 24, 2014 at 8:32pm

trig
tan^2(5x)cos^4(tx = 1/8 - 1/8cos(20x)
Monday, March 24, 2014 at 8:32pm

trig
Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c. i have sin theta as ...
Monday, March 24, 2014 at 1:29pm

Trig - sum and difference formulas
Write the expression as a single trigonometric functions: cos 6x cosx - sin6x sin x if you could do it step by step? also... How do I prove that sin(90deg + theta) = cos(theta)?? also step by step so i may learn?
Monday, March 24, 2014 at 12:21am

Trig
The number of values in the interval –π ≤ x ≤ π that satisfy the equation sin x = 2 cos x is 1 2 3 4 0
Sunday, March 23, 2014 at 6:46pm

trig
Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in ...
Sunday, March 23, 2014 at 7:05am

trig
cos/sin use 2npi and tan uses npi, but how do you know when to add 2npi or npi to the solution of the equation?
Wednesday, March 19, 2014 at 9:32pm

math trig
a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.
Wednesday, March 19, 2014 at 7:03pm

math trig
verify the identities COSX OVER 1PLUS SINX PLUS 1PLUS SINX OVER COSX IS EQUAL TO 2SEC.
Wednesday, March 19, 2014 at 7:00pm

math trig
a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle
Wednesday, March 19, 2014 at 6:54pm

trig
Find all angles, 0≤A<360, that satisfy the equation below, to the nearest 10th of a degree. 2tanA+6=tanA+3
Sunday, March 16, 2014 at 9:16pm

Math ( trig )
If a person on the Ferris wheel is 45 feet above the ground. The Gris wheel has a radius of 47.f and is 5 feet above the ground. At what degrees had the Ferris wheel rotated counted clockwise?
Wednesday, March 12, 2014 at 3:59pm

trig
a kite is flying at an angle of elevation of about 40 degrees. all 80 meters of string have been let out. ignoring the sag in the string, find the height of the kite to the nearest 10 meter
Sunday, March 9, 2014 at 11:15pm

math trig
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.
Sunday, March 9, 2014 at 7:43pm

math trig
two points A and Bare 80 feetapart on the same side of A towerand on a horizontal line through its foot.if angle of elevation of the top of the tower at A is 21 degree and B is 46 degree find the height of the tower.
Sunday, March 9, 2014 at 7:40pm

trig
three forces
Sunday, March 9, 2014 at 4:46pm

Trig
A guy wire attached to the top of an electric pole makes a 70deg angle with the level ground. At a point 25 feet from the guy wire (farther away from the pole), the angel of elevation to the top of the pole is 42deg. How long is the guy wire?
Friday, March 7, 2014 at 4:34am

Trig
Given ∆ABC. If side a is twice as long as side b, is <A necessarily twice as large as <B? Why?
Thursday, March 6, 2014 at 10:27pm

Trig
A guy wire attached to the top of an electric pole makes a 700 angle with the level ground. At a point 25 feet from the guy wire (farther away from the pole), the angel of elevation to the top of the pole is 420. How long is the guy wire?
Thursday, March 6, 2014 at 10:26pm

trig
city a is 300 miles directly north of city b assuming the earth to be a sphere of radius 4000 miles determine the difference in latitude of the two cities make answers accurate to the nearest second
Wednesday, March 5, 2014 at 8:21pm

Trig
A weather balloon is sighted between points A and B which are 5 miles apart on level ground. The angle of elevation of the balloon from A is 37 degrees and it's angle of elevation from B is 58 degrees. Find the height, in feet, of the balloon above the ground.
Wednesday, March 5, 2014 at 12:52pm

Trig
How do you solve this problem? y = 2sin 3x + 4sin 2x I haven't done these types of problems for awhile and have forgotten how to do them.
Wednesday, March 5, 2014 at 7:52am

Geometry/Trig
A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.
Monday, March 3, 2014 at 12:24am

Trig
given that sinx=3/4 and cosy=-5/13 and both x and y are in quadrant II, find the exact value of cos(x-y)
Sunday, March 2, 2014 at 5:54pm

Trig
Prove the following: 1/(tanØ - secØ ) + 1/(tanØ + secØ) = -2tanØ (1 - sinØ)/(1 + sinØ) = sec^2Ø - 2secØtanØ + tan^2Ø
Friday, February 28, 2014 at 9:41pm

Trig
Verify the given equations: ____1______ + ____1_______ = -2 tanθ tanθ – secθ tanθ + secθ 1 – sinθ = sec2θ – 2 secθ tan θ + tan2θ 1 + sinθ
Friday, February 28, 2014 at 8:53pm

trig
From the foot of a building i have to look upwards at an angle of 22 degrees to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50 degrees to look at the top of the tree. A) How tall is the ...
Thursday, February 27, 2014 at 1:52pm

Alg/Trig
The angle of elevation from a point on the ground to the top of a tree is 39.8 degrees. The angle of elevation from a point 51.7 ft farther back to the top of the tree is 19.7 degrees. Help find the height of the tree.
Wednesday, February 26, 2014 at 11:17am

trig
a sailor on a boat 580 metres from the base of a vertical cliff sights the top of a lighthouse with an angel of elevation of 31 degrees
Wednesday, February 26, 2014 at 8:17am

trig
an=(-1)n+1/2n
Tuesday, February 25, 2014 at 11:21pm

trig
Use a calculator to find: θ if θ = csc-1 1.7516. θ = _____°. Round to three decimal places.
Sunday, February 23, 2014 at 5:42pm

math12A TRIG pleas help
a farmer wishes to fence a field in the form of a right triangle.If one angle of the right triangle is 43.2 degree and the hypotenuse is 200yard,find the amount of fencing needed.
Thursday, February 20, 2014 at 2:10am

Trig
A plane is 48 miles west and 49 miles north of an airport. The pilot wants to fly directly to the airport. What bearing should the pilot take? In degrees and minutes
Wednesday, February 19, 2014 at 12:09pm

Trig
A straight road slopes upward 14 degrees from the horizontal. A vertical telephone pole beside the road casts a shadow of 60 feet down the road. if the angle of elevation of the sun is 55 degrees, what is the height of the telephone pole?
Monday, February 17, 2014 at 4:30am

Trig
If f(x)=cos^2x and g(x)=sin^2x, what is (f+g)(pi/15)
Saturday, February 15, 2014 at 7:29pm

trig
If $5000 is invested at a rate of 3% interest compounded quarterly, what is the value of the investment in 5 years?
Wednesday, February 12, 2014 at 8:10pm

trig
Given csc theta= 4, cot theta < 0 Find the exact values of cos theta and tan theta
Tuesday, February 11, 2014 at 9:35pm

math - trig
Why cant we solve an oblique triangle with the Law of Sines if we are given SAS?
Monday, February 10, 2014 at 8:34pm

trig
City A is 300kilometer due east of city B. city C is 200kilometer on a bearing of 123degree from city B.how far is it from C to A
Monday, February 10, 2014 at 1:59pm

trig
a central angle intercepts an arc on a circle equal in length to the diameter of the circle. find the measure, in radians, of the central angle.
Thursday, February 6, 2014 at 3:18pm

Math - Trig
Explain why we cannot solve an oblique triangle with the Law of Sines given SAS.
Thursday, February 6, 2014 at 3:37am

Math - Trig
Use the law of cosines to show that the measure of each angle of an equilateral triangle is 60deg. Explain your reasoning.
Thursday, February 6, 2014 at 2:54am

Math - Trig
What familiar formula can you obtain when you use the third form of the Law of Cosines c^2 = a^2 + b^2 - 2ab cos C and you let C = 90deg? What is the relationship between the Law of Cosines and this formula?
Thursday, February 6, 2014 at 2:54am

trig
An advertising blimps hovers over stadium at the altitude of 152 m.the pilot sites a tennis court at in 80 degree angle of depression. Find the ground distance in the straight line between the stadium and the tennis court. (note: in an exercise like this one, and answers ...
Thursday, February 6, 2014 at 12:04am

trig
An advertising blimps hovers over stadium at the altitude of 152 m.the pilot sites a tennis court at in 80 degree angle of depression. Find the ground distance in the straight line between the stadium and the tennis court. (note: in an exercise like this one, and answers ...
Thursday, February 6, 2014 at 12:00am

trig
A kite is flying at an angle of elevation of about 40 degrees. All 80 meters of string have been let out. Ignoring the sag in the string, find the height of the kite nearest ten meters.
Wednesday, February 5, 2014 at 11:51pm

trig
A kite is flying at an angle of elevation of about 40 degrees. All 80 meters of string have been let out. Ignoring the sag in the string, find the height of the kite nearest ten meters.
Wednesday, February 5, 2014 at 11:49pm

trig
Find all the solutions from [0, 2pi] cot^2x+csc=x
Tuesday, February 4, 2014 at 7:08pm

Trig
A fan makes 3 revolutions per second. The blades are 21 inches long. How do I find the angular velocity of a fan blade? in radians per second
Monday, February 3, 2014 at 4:24am

trig
Your search for A surveyor is trying to determine the width of a river. He forst stands at point A, directly opposite a tree at point B. He then walks 100 feet to point C. He measures the acute angle at point C to be 79 degrees. What is the width of the river?
Sunday, February 2, 2014 at 8:56pm

Trig
the sine of an angle is 0.6. the constraint is the angle lies in quadrant II. how do I figure out what x is to solve the six functions?
Saturday, February 1, 2014 at 10:28pm

trig
if sin and sec of theta are less than zero what quadrant is it in
Wednesday, January 29, 2014 at 7:11pm

trig
sin 60 ka man
Tuesday, January 28, 2014 at 11:50pm

trig
A person stands at a distance from the tower and eyes the top of the tower at 30 degree angle of elevation. He then walks 425 feet towards the tower and eyes the top of the tower at a 58 degree angle of elevation. The person is 5 feet tall. How tall is the tower?
Sunday, January 26, 2014 at 3:37am

trig
csc^4-cot^4= 1+cos^2/sin^2 i need help! please help me
Friday, January 24, 2014 at 8:46pm

Trig
Use a graphical method to find a solution to the following system of equations in the interval –1 ≤ x ≤ 5: y = x2 – 4x + 2 y = x + 2 The solution set to this system of equations in the interval –1 ≤ x ≤ 5 is {} {(2, 0)} {(0, 2), (5, 7...
Friday, January 24, 2014 at 4:08pm

trig
A computerized spin balance machine rotates a 35-inch-diameter tire at 400 revolutions per minute. (a) Find the road speed (in miles per hour) at which the tire is being balanced. (Round your answer to two decimal places.) (b) At what rate should the spin balance machine be ...
Thursday, January 23, 2014 at 5:58pm

Algebra 2/ Trig
Igor is flying a kite. he has let out 300 feet of kite string. the string makes an angle of 64 degrees with the level ground. To the nearest foot, how high is his kite?
Tuesday, January 21, 2014 at 5:53pm

trig
simplify (1-cot^2x sec^2x) / ( cot^2x)
Thursday, January 16, 2014 at 11:54pm

trig
simplify (1-cot^2x sec^2x) / ( cot^2x)
Thursday, January 16, 2014 at 11:53pm

Trig
Solve triangle ABC given the following conditions: 1. C = 135.77 deg, b = 10cm, a = 12cm 2. a = 11.5m, b = 10m, c = 16.94m
Wednesday, January 15, 2014 at 1:01am

TRIG help quickly please
Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you π/8 -7π/4 15π/4 3π/4
Tuesday, January 14, 2014 at 10:55pm

TRIG,
Can you solve and show me the work in these two equations? cos(3x)=-1 tan (theta)=-1
Sunday, January 12, 2014 at 10:59pm

trig
write a formula f*g*h when f(x)=x+1, g(x)=3x, h(x)=4-x
Sunday, January 12, 2014 at 8:07pm

trig
A pilot is flying at 10,000 feet and wants to take the plane up to 20,000 feet over the next 50 miles. What should be his angle of elevation to the nearest tenth?
Wednesday, January 8, 2014 at 5:28pm

trig
Two Airplanes leave an airport at the same time on different runways. One flies on a bearing of N66degreesW at 325 miles per hour. The other airplane flies on a bearing öf S26degreesW at 300 miles per hour. How far apart will the airplanes be after 2 hours?
Monday, January 6, 2014 at 9:59am

algebra 2 trig
if log3=a then log300 can be expressed as? 1) 100a 2)a+2 3)100+a 4)3a
Saturday, January 4, 2014 at 4:54pm

trig
From a tower 57 ft high two objects in a straight line from it are sighted at angles of depression of 27degrees and 40degrees5' respectively. Find the distance between the two objects.
Thursday, January 2, 2014 at 7:40am

trig
A lighthouse is 14 miles east of a dock. A ship sails N33degreesE from the dock. What will be its bearing from the lighthouse after having sailed 10 miles?
Thursday, January 2, 2014 at 7:33am

trig
Illustrate and solve. A monument near a dock is 12 miles east of a ship. After the ship has sailed 7 miles, the monument bears N62degreesE. In what direction is the ship sailing?
Thursday, January 2, 2014 at 7:26am

trig
A plane flies 75 miles south from an airfield, and then travels 120 miles more in a different direction. By this time it bears S29degreesE of the airfield. In what direction is it heading. illustrate and solve.
Thursday, January 2, 2014 at 7:19am

trig
The angle of depression of the top and bottom of a tower as seen from the top of a 100m high cliff are 30degree and 60degree respectively. find the height of the tower
Saturday, December 28, 2013 at 9:58am

3-D Coordinates Polar coordinates Precalculus Trig
The U.S.S. Lollipop is on assignment in the Atlantic Ocean. It travels from a longitude of 70 degrees west to 20 degrees west, along the latitude of 40 degrees north. How far does it travel? (Assume that the radius of the Earth is 6,400 km.) Erm I don't know how to solve ...
Wednesday, December 18, 2013 at 10:59am

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