Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are 65 degrees and 44 ...
Wednesday, September 10, 2014 by Harry
A spring is attached to the ceiling and pulled 17 cm down from equilibrium and released. After 3 seconds the amplitude has decreased to 16 cm. The spring oscillates 13 times each second. Assume that the amplitude is decreasing exponentially. Find an equation for the distance, ...
Sunday, August 17, 2014 by Tricia
I can't seem to prove these trig identities and would really appreciate help: 1. cosx + 1/sin^3x = cscx/1 - cosx I changed the 1: cosx/sin^3x + sin^3x/sin^3x = cscx/1-cosx Simplified: cosx + sin^3x/sin^3x = cscx/1-cosx I don't know where to go from there. 2. (sinx + ...
Friday, August 15, 2014 by Heather
Prove the following identity: 1/tanx + tanx = 1/sinxcosx I can't seem to prove it. This is my work, I must've made a mistake somewhere: Converted 1/tanx: 1/sinx/cosx + sinx/cosx = 1/sinxcosx Simplified 1/sinx/cosx: cosx/sinx + sinx/cosx = 1/sinxcosx Found common ...
Thursday, August 14, 2014 by Heather
the angle of from the top of a 41 fdepression as measured oot tower to a reference point on the ground is 65 degrees. How far away, to the nearest foot, is the reference point from the base of the tower
Thursday, August 7, 2014 by Anonymous
Math - trig
Determine the general solution of 8 cos^2x - 4cosx - 1 =0 (8cos^2x - 4cosx)/8 =1/8 cos^2x - 4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^-1(5) x = error
Saturday, July 26, 2014 by Bontle
Wires are attached to a pole to make it more secure. The diagram shows one of those wires having a length of 220 feet. The angle of elevation from the ground to the top of the pole is 36. What is the height of the pole? A. 178.0 ft B. 374.3 ft C. 159.8 ft D. 129.3 ft
Tuesday, July 15, 2014 by kells
What is Arcsec(-2) equal to and how can you find the correct answer? I got 2pi/3 but it was marked wrong on my test and I'm not sure why it's wrong. Can you please explain this to me? Thanks!
Monday, June 16, 2014 by Cici
how do you find algebraically the measure of the obtuse angle, to the nearest degree, that satisfies the equation 3 sec theta = 5 is it sec theta = 5/3 and then cos -1 (5/8) = 0.4
Wednesday, June 11, 2014 by Anonymous
Hi there! I NEED SERIOUS HELP, PLEASE!!! i have such a hard time with verifying identities! The question is: [(sin(theta/2)) / csc(theta/2)] + [(cos (theta/2) / sec(theta/2)] = 1 I have a few ideas on how to solve this, but am mainly not sure how to get rid of (theta/2). I am ...
Wednesday, June 11, 2014 by stephani
A weight attached to a long spring is bouncing up and down. As it bounces, its distance from the floor varies periodically with time. You start a stopwatch. When the stopwatch reads 0.3 seconds, the weight reaches its first high point 65 cm above the ground. The next low point...
Monday, June 9, 2014 by Sarah
A car drives 1000 feet on a road that is 8 degrees to the horizontal, as shown in the figure. The car weighs 3400 lb. Thus gravity acts straight down on the car with a constant force F=-3400j. Find the work done by the car in overcoming gravity?
Friday, June 6, 2014 by Jonny
trig angle of elevation
The eyes of a basket ball player are 6 feet above the floor. He is at the free-throw line, which is 15 feet from the center of the basket rim. The center of the rim is 10 feet above the floor Before shooting the player decides to step back a few steps. His angle of elevation ...
Wednesday, June 4, 2014 by Anonymous
The problem is: an airplane is flying in the direction 120 degrees with an airspeed of 320 mph, and a 35 mph wind is blowing in the direction 60 degrees. The question ask to find the true course and the ground speed. To solve the problem I have done this: Flying 120sin 320_+...
Monday, June 2, 2014 by Morgan
To guard against a fall, a ladder should make an angle of 75o or less with the ground. What is the maximum height that a 20-foot ladder can reach safely to the nearest tenth of a foot? in my diagram I set it up using the sin function since I want to find the height so I did (...
Monday, June 2, 2014 by Anonymous
check my set up please, trig
Sarah holds the end of her kite string 5 feet off the ground. The kite string makes a 43 degree angle of elevation with the horizontal and the kite is 105 ft. off the ground. How long is the kite string to the nearest tenth of a foot? cos43=100/x ?
Monday, June 2, 2014 by Anonymous
help please trig
According to the Americans With Disabilities Act, a ramp can rise no more than 1 ft for every 12 ft of horizontal distance. To the nearest tenth degree what is the maximum angle that the ramp can form with the ground?
Friday, May 30, 2014 by HELP!!!!
trig! check my answe please
An advertising blimp hovers over a stadium at an altitude of 125 m. The pilot sights a tennis court at an 8o angle of depression. To the nearest meter, find the ground distance in a straight line between the stadium and the tennis court. I set it up 125/tan8, knowing its a ...
Friday, May 30, 2014 by Anonymous
Hi, I would like to ask anyone available a quick question. How would I explain WHY it is that the data/function of average monthly temperatures for a location are a sinusoidal function? I am having trouble phrasing and explaining it, although I am aware that it is in fact ...
Thursday, May 29, 2014 by Lima Bean
Charo is 50 feet from the tallest totem pole, located in Alberta Bay, Canada, which has a height of 173 feet. If Charos eyes are 5 feet from the ground, find the angle to the nearest degree of elevation for her line of sight to the top of the totem.
Thursday, May 29, 2014 by Anonymous
At a horizontal distance of 101 meters from the base of a tower, the angle of elevation to the top is 15 degrees. Find the line of sight distance to the nearest meter.
Wednesday, May 28, 2014 by danielle
earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
Tuesday, May 27, 2014 by Melanie
To secure a 610-meter radio tower against high winds, guy wires are attached to a ring on the tower. The ring is 7 meters from the top. The wires form a 69o angle with the ground. To the nearest hundredth meter find the length of the guy wire
Tuesday, May 27, 2014 by Anonymous
You and a friend are rowing a boat 8.5 KPH heading north. A cross current is moving 3.2 KPH at an angle of 38 degrees north of the west direction. How fast are you actually moving and what direction are you actually heading?
Tuesday, May 27, 2014 by Kim
From a rock ledge the angle of elevation to the topof a treeis 25 degrees. The angle of depression to the bottom of the tree is 10 degrees. Find the heightof the rock ledgeto the nearest tenth and find the height of the tree to the nearest tenth
Tuesday, May 27, 2014 by trish
Robert is standing on a cliff and looks down at an angle of depression of 62 degrees to look at a boat. The cliff is 76 feet high. How far is the boat from the cliff? Round your answer to two decimal places. The boat is _________ feet from the cliff.
Saturday, May 24, 2014 by danielle
A loading ramp is 35 feet long and forms an angle measuring 10° with the ground. How high is the top end of the ramp off the ground? Round your answer to the nearest tenth?
Thursday, May 22, 2014 by alexis
A 24-foot ladder is placed against a building. The building is perpendicular to the level ground so that the base of the ladder is 11 feet away from the base of the building. How far up the building, in feet, does the ladder reach? Round to nearest hundredth.
Monday, May 19, 2014 by Joseph
Math - Int Trig
31) Locate, name, and classify the extrema of the function. Determine intervals which the function is increasing and decreasing f(x) = -x(x^2 - 2) 32) Determine the end behavior of the function f(x) = 2x - x^3
Friday, May 16, 2014 by Lilly
Math - Int Trig
Write an equation for the function that is finally graphed after the following transformations are applied to the graph y=|x|. The graph is shifted right 3 units, stretched by a factor of 3, shifted vertically down 2 units, and finally reflected across the x-axis.
Thursday, May 15, 2014 by Lilly
1. What is the period of the function? y = 4 cos pi x A. 1 B. 2 C. pi D. 2pi 2. Which represents the reference angle for 2pi/3? A. 2pi/3 B. pi/3 C. pi/4 D. pi/6
Tuesday, May 13, 2014 by Kirky
If it helps the answer according to this ACT compass sample test questions print out is 6.93. How to solve it is the question ... C is a 90 degree angle. AB is 8 and the hypotenuse. AC is the base .... we don't know it's length. It's on page 14 if you google this...
Tuesday, May 13, 2014 by Joe
A man on a 135 feet cliff perpendicular (at 90 degrees) to the ground looks down at an angle of 16 degrees and sees his friend. How far away is the man from his friend? How far away is the friend from the base of the cliff? Sketch the triangle that matches this scenario with a...
Monday, May 12, 2014 by Anonymous
a carousel has eight evely spaced seats shaped like animals. During each ride, the carousel makes between 8 and 9 clockwise revolutions. At the end of one ride, the carousel stops so that the lion is in the position where the zebra was when the ride started. through how many ...
Wednesday, May 7, 2014 by TJ
On an inclined road, which makes an angle of 25 degrees with the horizontal plane, stands a vertical tower. At a point Q, 150 ft from the base of the tower down the road, the angle of elevation to the top of the tower is 65. How high is the tower?
Tuesday, May 6, 2014 by Jendey
A soccer ball is placed 12 ft away from a goal post that measures 8ft high. You kick the ball and it hits the crossbar at the top of the goal. What was the angle of elevation of your kick?
Thursday, May 1, 2014 by Anonymous
The average depth of the water in a port on a tidal river is 4m. At low tide, the depth of the water is 2m. One cycle is completed approximately every 12h. a)Find an equation of the depth, d(t)metres, with respect to the average depth, as a function of the time, t hours, after...
Wednesday, April 30, 2014 by REALLY URGENT
On a typical day at an ocean port, the water has a maximum depth of 18m at 6:00 am. The minimum depth of 9m occurs 6.8 hours later. Write an equation to describe the relationship between the depth and time.
Tuesday, April 29, 2014 by Sam
How many years will it take for an initial investment of $5,000 to double if it is invested at a rate of 3% compunded continuously? Compounded annually?
Monday, April 28, 2014 by Denise
if the balloon is currently floating 60 feet in the air (measure from the bottom of the basket) , what is the approximate angle of depression of the person in the basket?
Wednesday, April 23, 2014 by yyayaa
Geometry- trig ratio
An observer (o) spots a plane flying at a 55 degrees angle to his horizontal line of sight. if the plane is flying at an altitude of 21,000 ft, what is the distance (x) from the plane (p) to the observer (o)?
Tuesday, April 15, 2014 by Anonymous