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September 5, 2015

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

trig proofs
cotx+tanx=secx+cscx
Tuesday, January 15, 2013 by katie

trig
An aircraft maintains a speed of 500 miles per hour in a southwestern direction. The velocity of the jet stream is constant 50 miles per hour from the west. Find the resultant vector, the speed, and actual direction of the aircraft.
Tuesday, January 15, 2013 by Deb

Proof math problem help? Please help if you can!
Let AB be the diameter of a circle, and let point P be a point on AB. Let CD be a chord parallel to AB. Prove that PA^2 + PB^2 = PC^2 + PD^2 It can be solved using geometry methods (no trig). Anyway, I figured out that PA^2 +PB^2 = 2OP^2 + 2OB^2. However, I cannot find right ...
Tuesday, January 15, 2013 by Knights

Calculus
Use a trig identity to combine two functions into one so you can solve for x. (The solution should be valid for any value of t). 3cos(t) + 3*sqrt(3)*sin(t)=6cos(t-x) I know that 6 cos(t-x) can be 6(cos(t)cosx(x)+sin(t)sin(x)) I dont know where to go from there though.
Tuesday, January 15, 2013 by Lisa

trig
Find the maximum and the minimum values of sinx + cosx and the smallest value of x which they have these values
Tuesday, January 15, 2013 by Annicka

Trig
log base b 64 - log base b 16 = log base 4 16 solve for the variable.. i got to the part as far as: (log 4/log b) = 2 now i m stuck at how i can isolate the b. plz help!
Monday, January 14, 2013 by Anonymous

Precalculus/Trig 5
A radio transmission tower is 120 feet tall. How long should a guy wire be if it is to be attached 15 feet from the top and is to make an angle of 26 degrees with the ground? Give your answer to the nearest tenth of a foot
Monday, January 14, 2013 by Anonymous

Precalculus/Trig 5
A radio transmission tower is 120 feet tall. How long should a guy wire be if it is to be attached 15 feet from the top and is to make an angle of 26 degrees with the ground? Give your answer to the nearest tenth of a foot
Monday, January 14, 2013 by Anonymous

Trigonometry
How am I suppose to transform the left side of the equation into the right side using trig identities? ): 1) sin^2θ - cos^2θ = 2 sin^2θ - 1
Thursday, January 10, 2013 by Sira

trig
Suppose that the point (x,y) is in the indicated quadrant. Decide whether the given is positive or negative. 25.) II, x/r 26.) III, y/r 27.) IV, x/y
Wednesday, January 9, 2013 by Emili

trig
Solve sin θ = -0.204 for 90º < θ < 270º. Give your answer to the nearest tenth of a degree. Honestly have no idea how to do this.
Tuesday, January 8, 2013 by Matt

Algebra 2/Trig
I've done every other single question besides this one. (There was 12). I'm stumped and would really appreciate some help! I have to simplify this: 5/3sqrt(3-4) I am not sure if you have to conjugate the denominator and multiply it with the top and bottom, then ...
Tuesday, January 8, 2013 by Raelyn

trig
solve for the value of sine and cosine function of 60 degrees.
Tuesday, January 8, 2013 by au

trig
solve for the value of sine and cosine function of 60 degrees.
Tuesday, January 8, 2013 by au

trig
use pythagorean theorem to solve for the value of x and y of a 60-60-60 degrees.
Tuesday, January 8, 2013 by au

trig
how to solve for the value of sine and cosine function of 0,90,180 and 270 degrees?
Tuesday, January 8, 2013 by au

trig
how to graph thr trig function f(x)3x-180)+2 and the parent function?
Monday, January 7, 2013 by kim

Math (Trig)
Find the indicated ratios in the triangle. Right triangle with a height of 2.56cm length of 4.65cm and hypotenuse of 5.31cm a. tan A b. cos C c. sin C How do I figure this out?
Monday, January 7, 2013 by Nj

trig
the mini tent of the clock is 5 cm long.how far is the tip of THE HAND TRAVEL IN 35 MINS.
Monday, January 7, 2013 by carol

Math Trig
I have to find the x (bottom length of the triangle) in a right triangle. angle A is 33.9 degrees angle B is 90 degrees and the height of the triangle is 3.3cm What formula do I use to figure out this question?
Monday, January 7, 2013 by nj

Trig..please help!
Two forces are pushing an ice shanty along the Ice. One has a magnitude of 330 lb in a direction due east. The other force has a magnitude of 110 lb in a direction 54 degrees east of north. What are the magnitude and direction of the resulant force?
Sunday, January 6, 2013 by Rachel

Trig
Find the other five trigonometric ratios of theta. cos theta=7/20 cos theta=1/5
Wednesday, January 2, 2013 by Lavanda

trig
Find the Opposite of the right angle where the angle is 61 degrees and the Adjacent is 10 cm.?
Thursday, December 20, 2012 by Joel

trig
2sinxcosx+4sin^2xcos^2x=0 solve for x in radians between [0,2pi) (I mean that it is sine squared x and cosine squared x not sine to the power of 2x or cosine to the power of 2x)
Wednesday, December 19, 2012 by Emma

Math-trig
A stairway runs up the edge of the pyramid. From bottom to top the stairway is 92 m long. The stairway makes an angle of 70° to the base edge, as shown. A line from the middle of one of the base edges to the top of the pyramid makes an angle of elevation of 52° with ...
Wednesday, December 19, 2012 by Anonymous

trig
simplify (1-sec^2(è)/(tan^2(è)
Wednesday, December 19, 2012 by adsfdsaf

trig/precalc
An airplane with a ground speed of 750 mph and a bearing of N 40 E encounters a wind of 50 mph with a bearing of S 30 E. Find the bearing and ground speed of the plane.
Sunday, December 16, 2012 by Mia

college trig word problem
A Ferris wheel has a radius of 25 feet.The wheel is rotating at two revolutions per minute.Find the linear speed, in feet per minute, of a seat on this ferris wheel.
Saturday, December 15, 2012 by Joel

trig
if tan x= 4/3 and pip < x < 3pi/2, and cot y= -5/12 with 3pi/2 < y < 2pi find sin(x-y)
Thursday, December 13, 2012 by liyah

trig
evaluate the following in exact form, where the angeles alpha and beta satisfy the conditions: sin alpha=4/5 for pi/2 < alpha < pi tan beta=7/24 for pie < beta < 3pi/2 answer choices A. sin(beta+alpha) B. tan(beta-alpha) C. cos(alpha-beta)
Thursday, December 13, 2012 by liyah

Trig
15^(-x-3)=-17^(-3x) using a log base 10
Wednesday, December 12, 2012 by Jason

precalc h
sin(theta)/1-cos(theta) + 1-cos(theta)/sin(theta) = 2csc(theta) That question makes absolutely no sense.. could someone help me? or lead me in the direction to figuring it out? and.. (Beside the trig functions is theta) 1+1/cos = tan^2/sec-1
Sunday, December 9, 2012 by sam

trig
An airplane flies with a speed of 425 mph and a heading of 63°. If the heading of the wind is 24°and the speed of the wind is 31 mph, what is the heading of the plane and the ground speed? I've done a couple questions like this but still a little fuzzy on setting ...
Sunday, December 9, 2012 by Chris

Trig
cos x cot = csc - sin
Tuesday, December 4, 2012 by Alycia

trigonometry
can i use factoring to simplify this trig identity? the problem is sinx + cotx * cosx i know the answer is cscx and i know how to get it but i want to know if i can do factoring to get it bc i tried to but it wont give me the answer . this is the step i went through: 1) sinx...
Monday, December 3, 2012 by v

trigonometry
1) Perform the operation and leave the result in trig. form. [3/4(cos pi/3 + i sin pi/3)][4(cos 3pi/4 + i sin 3pi/4)] Thanks
Monday, December 3, 2012 by mikey

Trig
The height of a rider on a Ferris wheel is given by h(t)=12-10c0s(2pi)(t) meters, where t gives time, in minutes of the ride. a. Find the amplitude, midline, and period of the function h. b. During the first two minutes of the ride, find the times when the rider has a height ...
Monday, December 3, 2012 by Carrie

Trig
A population of animals oscillates annually from a low of 1300 on January 1st to a high of 2200 on July 1st, and back to a low of 1300 on the following January. Assume that the population is well-approximated by a sine or a cosine function. a. Find a formula for the population...
Monday, December 3, 2012 by Alex

trig
A 600,000-cell bacteria culture is needed for a lab experiment, but you only could purchase 1,000 cells. If the cells double each day, exactly how long will it be before the experiment can be run? Create a model for the bacteria. If the experiment is in seven days, how many ...
Monday, December 3, 2012 by Amanda

trig
A tree on a hillside casts a shadow c ft down the hill. If the angle of inclination of the hillside is b to the horizontal and the angle of elevation of the sun is a, find the height of the tree. Assume a = 48°, b = 18° c = 235 ft. (Round your answer to the nearest ...
Thursday, November 29, 2012 by Anonymous

precalc/trig
olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1
Thursday, November 29, 2012 by bob

trig
A plane has an airspeed of 200 miles per hour and a heading of 28.0°. The ground speed of the plane is 207 miles per hour, and its true course is in the direction of 38.0°. Find the speed and direction of the air currents, assuming they are constants. (Round your ...
Thursday, November 29, 2012 by bryan

trig
angles of elevation to an airplane are measured from the top and the base of a building that is 40 m tall. The angle from the top of the building is 31°, and the angle from the base of the building is 40°. Find the altitude of the airplane. (Round your answer to two ...
Wednesday, November 28, 2012 by Barb

trig
given that 0 is less then or equal to theta and theta is less then or equal to pi. ans cos theta = 2/squar root of 7. Find sin theta
Wednesday, November 28, 2012 by Lilly

Pre-Cal Trig
Two lookout towers are situated on mountain tops A and B, 4 mi from each other. A helicopter firefighting team is located in a valley at point C, 3 mi from A and 2 mi from B. Using the line between A and B as a reference, a lookout spots a fire at an angle of α = 37° ...
Wednesday, November 28, 2012 by Kendall

Trigonometry
How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.
Tuesday, November 27, 2012 by Sammy

trig
If tan y = -4/3 and y is in Q I'VE find cos 2y
Tuesday, November 27, 2012 by Maddie

Math (trigonometry)
How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1
Tuesday, November 27, 2012 by Sammy

trig
If tan y = -4/3 and y is in Q I'VE find cos 2y
Tuesday, November 27, 2012 by Maddie

trig
How would I solve this problem for t? 720 = 11.895+2.545sin [2pi/366(t-80.5)]
Sunday, November 25, 2012 by anna

trig
I don't understand what to do after i convert everything into cos and sin. Verify: cosx(tanx+cotx)=cscx
Sunday, November 25, 2012 by Sally

math
Simplify sin 2 theta over 2 cos theta to a single primary trig function
Thursday, November 22, 2012 by rose

Physics
he graph of the velocity of a mass attached to a horizontal spring on a horizontal frictionless surface as a function of time is shown below. The numerical value of V is 5.48 m/s, and the numerical value of t0 is 8.97 s. a) What is the amplitude of the motion in m? b) What is ...
Tuesday, November 20, 2012 by Jalopy

trig
find all the values of X between 0 and 2π such that cos(3x-π/2) = √3/2
Tuesday, November 20, 2012 by diego sanchez

TRIG HELP
find the exact solutions over the interval tanx = 1 all real x
Tuesday, November 20, 2012 by Matt

math
(-3/5, 2) is a point on the terminal side of theta, find the value of the six trig functions
Monday, November 19, 2012 by Amina

trig
It is 4.7km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73E. A ship has sailed due west from the port and its bearing from the lighthouse is N31E. How far has the ship sailed from the port?
Sunday, November 18, 2012 by Ashley

Trig
Suppose you would like to cross a 200-foot wide river in a boat. Assume that the boat can travel 35 mph relative to the water and that the current is flowing west at the rate of 5 mph. What bearing should be chosen so that the boat will land at a point exactly across from its ...
Sunday, November 18, 2012 by Adam

Trig
Suppose you would like to cross a 209-foot wide river in a boat. Assume that the boat can travel 32 mph relative to the water and that the current is flowing west at the rate of 6 mph. If the bearing chosen is chosen so that the boat will land at a point exactly across from ...
Sunday, November 18, 2012 by Adam

trig
A ship is headed due north at a constant 20 miles per hour. Because of the ocean current, the true course of the ship is 15°. If the currents are a constant 18 miles per hour, in what direction are the currents running? (Enter your answers as a comma-separated list. Round ...
Friday, November 16, 2012 by janice

trig
A 52-foot wire running from the top of a tent pole to the ground makes an angle of 57° with the ground. If the length of the tent pole is 44 feet, how far is it from the bottom of the tent pole to the point where the wire is fastened to the ground? (The tent pole is not ...
Friday, November 16, 2012 by janice

trig
Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest whole number. Round your answers for sides c and c' to two decimal places. If either triangle is not possible, enter NONE in each corresponding answer blank...
Friday, November 16, 2012 by janice

trig
Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest minute. Round your answers for sides a and a' to two decimal places. If either triangle is not possible, enter NONE in each corresponding answer blank.) B...
Friday, November 16, 2012 by janice

trig
Find all solutions to the following triangle. (Round your answers for angles A, B, A', and B' to the nearest minute. Round your answers for sides a and a' to the nearest whole number. If either triangle is not possible, enter NONE in each corresponding answer blank...
Friday, November 16, 2012 by janice

trig
Find all solutions to the following triangle. (Round your answers to one decimal place. If either triangle is not possible, enter NONE in each corresponding answer blank.) A = 115.2¡ã, a = 43.6 cm, b = 23.1 cm First triangle (assume B ¡Ü 90¡&...
Friday, November 16, 2012 by janice

trig
Given BC = 53 cm, BD = 62 cm, CD = 80 cm, ABC = 53°, and ACB = 66°, find the following. (Round your answers to the nearest whole number.) (a) the length of the chainstay, AC AC = cm (b) BCD BCD = °
Friday, November 16, 2012 by janice

trig
A barge is pulled by two tugboats. The first tugboat is traveling at a speed of 16 knots with heading 135°, and the second tugboat is traveling at a speed of 15 knots with heading 195°. Find the resulting speed and direction of the barge. (Round your answers to the ...
Friday, November 16, 2012 by janice

trig
A plane has an airspeed of 190 miles per hour and a heading of 24.0°. The ground speed of the plane is 214 miles per hour, and its true course is in the direction of 40.0°. Find the speed and direction of the air currents, assuming they are constants. (Round your ...
Friday, November 16, 2012 by janice

trig
A plane is flying with an airspeed of 150 miles per hour and heading 155°. The wind currents are running at 25 miles per hour at 160° clockwise from due north. Use vectors to find the true course and ground speed of the plane.
Friday, November 16, 2012 by janice

trig
A certain species of tree grows an average of 0.5 cm per week. Write an equation for the sequence that represents the weekly height of this tree in centimeters if the measurements begin when the tree is 200 centimeters tall.
Thursday, November 15, 2012 by Ping

trig
given that 1/2pi<theta<pi and sin theta=1/5, use appropriate trigonometric formulas to find the exact values of the following (i) cos(2theta) (ii) cos theta (iii) sin(2theta)
Thursday, November 15, 2012 by Sarah

Physics
Calculate the ratio of the kinetic energy to the potential energy of a simple harmonic oscillator when its displacement is 1/8 of its amplitude. (The answer is an integer.) Approach: Choose a specific trigonometric form for the position function x(t). It doesn't matter ...
Thursday, November 15, 2012 by Alphonse

Difficult Trig Word Problem
The displacement of a spring vibrating in damped harmonic motion is given by y(t) = 4e^-3t sin(2pi*t) where y = displacement and t = time with t greater than/equal to zero. Find the time(s) when the spring is at its equilibrium position (y=0). The number "e" is Euler...
Wednesday, November 14, 2012 by Greg

trig
Olivia has a pool slide that makes an angle of 25º with the water. The top of the slide stands 4.5 feet above the surface of the water. The slide makes a straight line into the water. How long is the slide?
Tuesday, November 13, 2012 by Anonymous

Trig Identity
Prove or disprove the following identity sin^4theta - cos^4theta = sin^2theta-cose^2theta
Tuesday, November 13, 2012 by Jerry

trig
Solve tan2A - 2tanA = -1 for 0º≤A≤360º.
Monday, November 12, 2012 by trig

trig
cot^2/1 + cot^2 = cos^2
Monday, November 12, 2012 by TRIG HELP

TRIG
Sinxtanx = sec x
Monday, November 12, 2012 by TRIG HELP

TRIG
(cotx + cscx(1-cosx)= SIN x
Monday, November 12, 2012 by TRIG HELP

TRIG
Verify cos x/1+sinx + 1+ sinx/cosx = 2sec
Monday, November 12, 2012 by TRIG HELP

TRIG
Find one numerical value for cot x/cos x = 5
Monday, November 12, 2012 by TRIG HELP

trig
(1 + sinx)(secx - tanx) = cos x
Sunday, November 11, 2012 by mary

trig
tan^2x/1 + tan^2x = sin ^2 x
Sunday, November 11, 2012 by mary

trig
cos^2 A/ 1+sin A
Sunday, November 11, 2012 by mary

precalc/Trig
Assume we know the following: cos(22.5 degrees)= sqrt(2+sqrt2)/2 sin(22.5 degrees)=sqrt(2-sqrt2)/2 cos(18 degrees)=sqrt((sqrt5+5)/8) sin(18 degrees)=(sqrt5-1)/4 What is: Sin(82.5 degrees) cos(82.5 degrees) sin(12 degrees) cos(12 degrees)
Saturday, November 10, 2012 by Anonymous

Precalc/Trig
evaluate the expression assuming that cos(x)=1/7, sin(y)=1/3, sin(u)=2/5 and cos(v)=1/3. what is cos(u+v)? sin(x-y)? and tan(u-v)?
Saturday, November 10, 2012 by Liz

trig
the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15
Thursday, November 8, 2012 by aj

Trig
Give: a=alpha B=beta csc a= 2 pi/2<a<pi secB=-3 pi/2<B<pi 1)find sin(a+B) 2)find tan(a-B) 3)cos B/2 4)sin a/2
Wednesday, November 7, 2012 by Sierra

trig
How do you find the exact value of sin 5pi/8?
Wednesday, November 7, 2012 by Sierra

TRIG
show that cos(pi x) = pi cosx is not an identity by finding a single value of x for which it fails to hold.
Tuesday, November 6, 2012 by Lynn

TRIG
Given that tanx = 1/sqr(15) and secx -4/sqr(15) find the value of sinx
Tuesday, November 6, 2012 by Lynn

trig
A tree growing on a hillside casts a 121-foot shadow straight down the hill. Find the height of the tree (in feet) if the slope of the hill is 8 degrees and the angle of elevation of the sun from the horizontal is 50degrees.
Monday, November 5, 2012 by joey

trig
find the exact value of sinu/2, given that cosu=-4/5 and pi/2less than u less than pi
Sunday, November 4, 2012 by monica

trig
2 cos(theta-13)= square root of 3
Friday, November 2, 2012 by john

TRIG
Triangle FGH has vertices F(0, 10), G(10, 0), and HR(1, -1). After rotating triangle FGH counterclockwise about the origin 75º, the coordinates of G' to the nearest hundredth are (2.59, ?).
Tuesday, October 30, 2012 by karina602

TRIG HONORS CH: 5.8
a ship leaves port with a bearing of S 42deg W after traveling 7 miles, the ship turns 90deg and travels on a bearing of N 52deg W for 10 miles at that time, what is the bearing of the ship to the port?
Monday, October 29, 2012 by Ashley

trig
a ship leaves port with a bearing of S 42deg W after traveling 7 miles, the ship turns 90deg and travels on a bearing of N 52deg W for 10 miles at that time, what is the bearing of the ship to the port?
Monday, October 29, 2012 by Selena

algebra 2 trig
8/2+√6
Monday, October 29, 2012 by Elizabeth

trig
Solve for x please? x/x+3 - 1/x+2 = x/2x+4
Sunday, October 28, 2012 by Robbie

Pre-Cal/Trig
Explain how to solve the following question. Surveying: From a point A hat is 10 meters above level ground, the angle of elevation of the top of a building is 42 degrees and the angle of depression of the base of the building is 8 degrees. Approximate the height of the building.
Wednesday, October 24, 2012 by Monica

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Homework Help: Math

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