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September 22, 2014

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

Post a New Question | Current Questions

Math Precal/Trig
Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.
Thursday, September 18, 2014 at 11:07pm

trig
if 15 sin theta=8 cos theta , then what is sin theta-cos theta/sin theta +cos theta
Thursday, September 18, 2014 at 8:02pm

trig
A bird at the top of a tree looks down on a field mouse at an angle of depression of 65°. If the field mouse is 30 meters from the base of the tree, find the vertical distance from the ground to the bird’s eyes. Round the answer to the nearest tenth.
Thursday, September 18, 2014 at 2:30pm

trig
A planes actual resulting ground speed and direction are 550 mph and N26E. A wind is blowing from the northeast. If the pilot is holding a course of N27E how fast is the wind blowing I'm just stumped. It's an extra credit question is basically why I'm stumped.
Tuesday, September 16, 2014 at 3:23pm

Trig
A planes actual resulting ground speed and direction are 550 mph and N26E. A wind is blowing from the northeast. If the pilot is holding a course of N27E how fast is the wind blowing?
Tuesday, September 16, 2014 at 3:21pm

trig
if acos^3x+3acos.sin^2x=m asin3x+3acos^2x.sin=n proof that-(m+n)^2/3+(m-n)^2/3=2a^2/3
Sunday, September 14, 2014 at 4:54am

trig
proof that (m+n)^2/3+(m-n)^2/3=2a^2/3
Sunday, September 14, 2014 at 4:49am

trig
I have arrived at .322 as the sine of the angle how do I find the actual angle (in decimal/deg)
Saturday, September 13, 2014 at 4:49pm

Trig
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 at 4:36pm

Trig
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 at 4:34pm

trig
the 40ft. pole is braced by , a wire from its top in a point 60ft. from its base up, snd 18° slope. how long is the wire?
Wednesday, August 27, 2014 at 7:41am

trig
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 at 8:41pm

trig
bike tires are 22 inches in diameter and has an angular speed of 5 miles per second, how fast is the bike traveling in mph
Friday, August 15, 2014 at 5:20pm

Precalculus/Trig
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 at 12:14pm

Precalculus/Trig
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 at 8:30pm

trig
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 at 10:01pm

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 at 12:28pm

trig
two poles of height 25 cm & 20 cm are are parallel to each other with a distance of 12 cm between them. what is the distance between the top of the two poles?
Saturday, July 26, 2014 at 12:48am

trig
In 60 ft. Run sith a 21 degree slope what is rise(ft)
Wednesday, July 16, 2014 at 9:15pm

trig
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 at 8:05pm

trig
evaluate the expression under the given conditions tan 2 theta; cos theta=7/25, theta in quadrant I
Wednesday, July 9, 2014 at 11:41pm

Trig laws
Given the area ABC=7.52m©÷. Find a, when m¡ÐB=40¡Æ and c=6m.
Sunday, June 22, 2014 at 8:55pm

Trig laws help
mÚA=15.52, c=18ft, b=16ft, then a=? ft
Sunday, June 22, 2014 at 6:38pm

trig
if (-12,5) is a pointon the terminal side of an angel 0 find the exact value of six trig funcation of 0
Thursday, June 19, 2014 at 6:45pm

Math: Trig
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 at 7:38pm

trig
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 at 8:17pm

trig
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 at 5:14pm

trig
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 at 12:16am

trig
Establish the following identity: CosA/1-TanA + SinA/1-CotA = CosA-SinA
Friday, June 6, 2014 at 9:30am

trig
Given that cos A = 5/13 and A and B are both acute angles, calculate the value of Sin2A and Cos2A
Friday, June 6, 2014 at 9:26am

trig
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 at 5:00am

trig
in triangle ABC, a = 2, b = the square root of 3, and m,angle C = 30 degrees. What is the value of c? a= 1 b= 2 c= 2square root of 3 d=square root of 3 over 3
Thursday, June 5, 2014 at 9:26am

Trig
Find the coterminal angles: one positive one negative angle. 55° and (9(3.14)/5) answer degrees in radians and radians in degrees
Wednesday, June 4, 2014 at 10:33am

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 at 2:46am

Trig
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 at 11:14pm

trig
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 at 9:47pm

trig
Draw the graph of f(x) = tan x and g(x) = 2cos x for 180 _< thetha _< 180 {since its a graph I'm sure how to draw it here}
Monday, June 2, 2014 at 4:23pm

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 at 1:54am

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 at 7:40pm

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 at 1:38pm

Trig
I was wondering, is a sinusoidal function an algebraic model? Or, on the other hand, is there a way to derive an algebraic model from a sinusoidal function?
Thursday, May 29, 2014 at 11:42pm

Trig
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 at 11:31pm

Trig
Charo is 50 feet from the tallest totem pole, located in Alberta Bay, Canada, which has a height of 173 feet. If Charo’s 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 at 3:24pm

trig
Solve (1+tan square A)(1-sinA)(1+ sinA)
Wednesday, May 28, 2014 at 5:22pm

trig
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 at 3:03pm

trig
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 at 11:30pm

trig length
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 at 9:36pm

trig
A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road? should I use sin?
Tuesday, May 27, 2014 at 7:56pm

Trig
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 at 7:30pm

trig
A 15 ft. ladder makes a 35o angle with the side of a house. To the nearest tenth of a foot how high up on the house does the ladder come?
Tuesday, May 27, 2014 at 7:17pm

trig
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 at 10:20am

trig
A kite string is 65 metres long and makes an angle of 32 degrees with the ground. Calculate the height of the kite above the ground to the nearest metre.
Sunday, May 25, 2014 at 5:24pm

math trig
a 3.8m ladder rests against a vertical wall and makes an angle of 38 degrees with the wall. how far does the ladder reach up the wall?
Sunday, May 25, 2014 at 6:58am

trig
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 at 11:57pm

Trig
What is the common ratio, r, for the sequence represented by the formula an = 3(2)^-n? 1/2 2 3 6 Is it 2?
Saturday, May 24, 2014 at 1:06am

trig
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 at 6:40pm

Trig help
What values for theta(0<_theta<_2pi) satisfy the equation? 3sin theta = sin theta-1
Tuesday, May 20, 2014 at 12:21pm

Trig
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 at 12:53pm

Precal/trig
sina=3/5, pi/2<a<pi evaluate cos2a
Monday, May 19, 2014 at 12:54am

trig
In right ∆LMN, sin M = 0.759. What is cos N?
Friday, May 16, 2014 at 10:10am

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 at 3:42am

Math - Int Trig
Form a polynomial f(x) with real coefficients having the given degree and zeros 21) Degree: 4, zeroes: 2i and -3i 22) Degree: 3, Zeroes i and -10
Thursday, May 15, 2014 at 9:36pm

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 at 1:07pm

Trig 3
Why does 1 - COS2(Squared) _________________ COS2 = tan2
Thursday, May 15, 2014 at 9:56am

Help me trig.
solve the equation in the interval [0,2pi) tan (t/2)-sint=0
Wednesday, May 14, 2014 at 10:54pm

Trig
Find a parametric equation for the ellipse. Make sure that the graph of your parametric equation is a complete ellipse. 3x^2+4y^2=12
Wednesday, May 14, 2014 at 7:41pm

Trig 2
What is the smallest value for x where y = sin 2x reaches its maximum ...wtf that means.
Tuesday, May 13, 2014 at 7:41pm

Trig help
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 at 6:56pm

Trig
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 at 9:31am

trig
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 at 5:55pm

MATH: TRIG
IF X IS AN ANGLE IN THE FIRST QUADRANT AND COSX= 3/5, FIND THE EXACT VALUE OF SIN2X DONT UNDERSTAND, KNOW THAT THE COSX IS ON A 3,4,5 TRIANGLE
Monday, May 12, 2014 at 3:44pm

Trig
Use trigonometric identities to solve the equation csc^2x -(√3+1)cotx+(√3-1)=0 in the interval [0, 2pi]
Friday, May 9, 2014 at 6:39am

trig
solve the equation on the interval [0, 2pi]: tan^2 x - 3 tan x + 2 = 0
Thursday, May 8, 2014 at 10:01pm

Trig
Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.
Wednesday, May 7, 2014 at 3:06pm

Trig
Use the given information to evaluate sin (a-b). Exact answers. No decimals. Sin a = -7/25, cot b = 8/15; neither a nor b are in quadrant III.
Wednesday, May 7, 2014 at 3:06pm

Trig
Use the given information to evaluate sin (a+b). Exact answers only. No decimals. Tan a = 4/3, cos b ='-12/13; neither a nor b are in quadrant III.
Wednesday, May 7, 2014 at 3:05pm

Trig
Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.
Wednesday, May 7, 2014 at 12:48pm

Trig
Use the given information to evaluate sin (a-b). Exact answers. No decimals. Sin a = -7/25, cot b = 8/15; neither a nor b are in quadrant III.
Wednesday, May 7, 2014 at 12:46pm

Trig
Use the given information to evaluate sin (a+b). Exact answers only. No decimals. Tan a = 4/3, cos b ='-12/13; neither a nor b are in quadrant III.
Wednesday, May 7, 2014 at 12:42pm

Trig
Simplify each expression using fundamental identities. 1. Sin theta cot theta 2. 1-sin^2 theta / cos theta
Wednesday, May 7, 2014 at 12:37pm

trig
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 at 12:03pm

trig
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 at 11:58pm

trig
Find all points of intersection of the polar curves r= 2 + 4cos theta and r= 6cos theta. Please explain in detail.
Tuesday, May 6, 2014 at 3:30pm

Trig
Given sin θ = −1/2 and sec θ > 0, find the exact value of tan 2θ. Radical 3 Radical 3/2 Negative radical 3 Negative radical 3/2
Saturday, May 3, 2014 at 7:29pm

Trig
Given sin x = 5/13 and 0 < x < pi/2 find the value of sin(π − x). 12/13 5/13 -12/13 -5/13
Saturday, May 3, 2014 at 7:28pm

trig
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 at 5:08pm

Trig. Math
A circle of radius 2 inscribed in a right triangle. Find the simplest expression possible for the triangle's area as a function of its hypotenuse.
Thursday, May 1, 2014 at 3:57pm

Trig functions
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 at 8:55pm

trig
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 at 11:25pm

Trig
What is the sum of the arithmetic series where n=50 , t1=9 and t2=331
Tuesday, April 29, 2014 at 5:01pm

Trig
What is the sum of the arithmetic series where n=100 , t1=7 and t2=205
Tuesday, April 29, 2014 at 4:59pm

Trig
Find the 20th term of an arithmetic sequence with a=1 and d=1/2
Tuesday, April 29, 2014 at 4:53pm

Trig
Find the 6th term of the arithmetic sequence with a9=120 and a14=195
Tuesday, April 29, 2014 at 4:51pm

Integrated Trig
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 at 2:16pm

Trig
Write a quadratic equation whose roots are 5 + i radical 2 and 5 – i radical 2 ____ x^2 + _____ x+ ______=0
Saturday, April 26, 2014 at 4:37pm

Trig
If sec A =5/4 and A is an angle in Quadrant IV, find the value of cos A. A. -4/5 B.4/5 C.-5/4 Is it choice A
Saturday, April 26, 2014 at 4:32pm

trig
16cos(x)-3sec(x)=0 Find all solutions for x in [0, 2pi)
Wednesday, April 23, 2014 at 11:56pm

trig
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 at 9:27pm

TRIG
Half angles in trig (square root(1-square root(21)/5)/2)
Tuesday, April 22, 2014 at 10:14pm

Inverse Trig
Using -pi/2 ≤ y ≤ pi/2, what are the following solutions? y=arcsin root3/2 y=arcsin 1/2
Monday, April 21, 2014 at 5:44pm

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