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July 31, 2014

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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trig
prove that there exists no smallest possitive real number dose there exist a smallest positive rational number given a real number x, does there exist a smallest real y>x?
Tuesday, August 28, 2012 at 2:40pm

Math (Trig/pre-calculus)
some stars are so far away that their position appear fixed as earth orbits the sun. other stars, however, appear over time to shift their positions relative to the background of "fixed" stars. suppose that the star shown below appears to shift through an arc of ...
Thursday, August 23, 2012 at 9:52pm

trig
Imagine that you are sitting 6 feet away from a television that is hung on a wall. The top of the TV is 8 feet off the ground. Which function correctly represents the angle that you make with the top of your television?
Wednesday, August 15, 2012 at 2:34pm

trig
Let  be an angle in standard position and the point (a, b) be the point of intersection of the terminal side of  with the unit circle. State the unit circle definitions of the six trigonometric functions. cos = sec = sin = csc = tan = cot =
Monday, August 13, 2012 at 8:53pm

trig
find the exact value of the expression , sin-1(-0.5)
Monday, August 13, 2012 at 3:58pm

trig
Construct the equations of the following trigonometric functions: A)A sine function with amplitude 2, period , phase shift /3 right B)A tangent function with a reflection in the y-axis, period ¾, translation up 5 units C)A cosine function with period 270°, ...
Sunday, August 12, 2012 at 7:07pm

trig
For the function -2sin(x-(pi/3)) between x = 0 and x = 2 : (6 marks) For what value(s) of x does y have its maximum value? For what value(s) of x does y have its minimum value? For what value(s) of x does y=1?
Sunday, August 12, 2012 at 1:44pm

trig
Determine the period, amplitude and phase shift for each given function: A)y = -4 cos 3x + 5 B)y = 2/3 sin (30x-90degrees)-10 c)y = -0.38 tan (x/3+pi/3) d)y = pi cos(2x)+ pi
Sunday, August 12, 2012 at 1:33pm

trig
Please help to find the value of: Sin 17 degree.
Thursday, August 9, 2012 at 10:33pm

trig
(sec 8 x - 1)/(sec 4x -1) = tan 8x/tan 4x Prove it!
Thursday, August 9, 2012 at 11:57am

algebra/trig
1. which number below is irrational? a)√4/9 b) √20 c)√121 Why is the number you chose irrational? 2. express in simplest form: √48-5√27+2√75 3. solve for x: (√x+2)-3=0
Tuesday, August 7, 2012 at 9:59am

algebra/trig
1. f(x)=x^3+5 does f(x) have an inverse? if so, find the inverse and decide if it is a function. 2. if f(x)= 3x+1 and g(x)= x^2-1, find (f∙ g)(2) 3. if f(x)= (2x)^2, find f(-4) thank you :)
Tuesday, August 7, 2012 at 9:51am

Calculus 1 Integration Trig Inverse
integral of (4/(x times the square root of (x^2-1)) + (1+x+x^3)/(1+x^2)dx
Monday, July 30, 2012 at 10:42pm

Caculus:Integration Inverse Trig
integral of (4/(x times the square root of( x^2-1)) + (1+x+x^3)/(1+x^2)dx
Monday, July 30, 2012 at 10:40pm

trig
find sin theta and tan theta if cos theta = 2/3 and cot theta is >0 and find cos theta and cot theta if sin theta = 1/3 and tan theta is <0 thanks! :)
Thursday, July 26, 2012 at 11:23pm

Trig Functions
Which of the following lists contains only functions with vertical asymptotes in their graphs? A. Cosine, sine, tangent, cotangent B. Tangent, secant, cosecant, cotangent C. Sine, tangent, secant, cosecant D. Cosine, sine, secant, cosecant
Thursday, July 26, 2012 at 4:23pm

Radicals and Trig.
I am catching up over summer on math units that I have to rewrite. In my textbook it asks me to find the base of two triangles and add them together. the smallest angle of the larger triangle is 30 degrees. The opposite side to the angle is 40cm. it gives me Tan 30 = 40/x 1/...
Wednesday, July 25, 2012 at 3:32pm

Trig
Claim: For all theta such that -pie/2<theta<pie/2 the following holds true: (1+tan(theta))^2=1/cos(theta)
Tuesday, July 24, 2012 at 11:02am

Trig
There is an airplane at an altitude of 12000 ft. The angle of depression is 1 degree. How far on the ground is the plane.
Friday, July 20, 2012 at 2:36pm

Trig
verify the following identity: 2sinxcos^3x+2sin^3cosx=sin(2x)
Thursday, July 19, 2012 at 12:50pm

Trig
verify the following identity: tanx+cotx/cscx=secx
Thursday, July 19, 2012 at 12:49pm

Trig
verify the following identity: cos(A-B)/cosAsinB=tanA+cotB
Thursday, July 19, 2012 at 12:48pm

Trig
verify the following identity: sin(x+y)*sin(x-y)=sin^2x-sin^2y
Thursday, July 19, 2012 at 12:47pm

Trig
Verify the following identity: 1-cosx/sinx=sinx/1+cosx
Thursday, July 19, 2012 at 12:45pm

Trig/Physics
Joe walks 5 miles in the direction degrees North of East, and then 10 miles in the direction 20 degrees West of North. (a) How far is Joe from his starting position? (b) In what direction is Joe from his starting position?
Wednesday, July 18, 2012 at 10:01pm

Trigonometry
Simplify the expression using trig identities: 1. (sin4x - cos4x)/(sin2x -cos2x) 2. (sinx(cotx)+cosx)/(2cotx)
Sunday, July 15, 2012 at 6:29pm

Math Trig
13. What is the equation of a cosine function with amplitude 3, transition point (−1, 1), and period p? A. y = p cos [3(x − 1)] − 1 B. y = 3 cos [2(x − 1)] + 1 C. y = 3 cos [p (x + 1)] − 1 D. y = 3 cos [2(x + 1)] + 1 16. What is the transition ...
Saturday, July 14, 2012 at 6:34am

trig
establish identity 5csc^2theta-3cot^2theta=2csc^2theta+3
Friday, July 13, 2012 at 10:00pm

trig
Solve the equation on the interval [0,360) cos^2t+2cos(t)+1=0
Thursday, July 12, 2012 at 10:51am

trig
Find all solutions in the interval [0,360) sin(4t)=ã3/2
Thursday, July 12, 2012 at 10:49am

TRIG
A WORKER PRESENT SALARY IS 24 PER ANNUM HIS ANUAL INCREMENT IS 10% OF HIS BASIC SALARY WAT WUD BE HIS ANNUAL SALARY AT THE BEGINNIN OF THE THIRD YEAR
Wednesday, July 11, 2012 at 10:27am

TRIG
Given that tan¤=3/4 and ¤ is in the second quadrant find sin2¤ (¤=theta)
Wednesday, July 11, 2012 at 10:17am

TRIG
Given that tan¤=3/4 and ¤ is in the second quadrant find sin2¤ (¤=theta)
Wednesday, July 11, 2012 at 10:17am

trig
determine the amplitude,period and phase shift of y=-2cos(pix-3)
Wednesday, July 11, 2012 at 12:19am

Airplane trig question
An airplane, flying at a speed of 420 miles per hour, flies from point A in the direction 131 degrees for 90 min. and then flies in the direction 41 degrees for 30 min. in what direction does the plane need to fly in order to get back to point A?
Tuesday, July 10, 2012 at 7:34pm

Trig
find all solutions to the equation √3 csc(2theta)=-2 Would the answer be π/6 + 2πn, 5π/6 +2πn or π/6 + πn, 5π/6 +πn? or neither?
Tuesday, July 10, 2012 at 7:30pm

trig
sin t /1-cos t - 1+ cos t/sin t= 0
Tuesday, July 10, 2012 at 5:24pm

trig
Prove sin 1 cos  1 cos sin  0 1. Show each step of your proof. 2. Provide written justification for each step of your proof. C. If you use sources, include all in-text citations and references in
Tuesday, July 10, 2012 at 5:22pm

Trig
Given y=2-4cos(3x-pi/4), find each of the following, giving the general representation of the location of all minimums. Also provide the graph of two full cycles, labeling everything. Domain = Range = Amplitude = Period = Ph. Shft. = Interval for one Complete cycle = ...
Monday, July 9, 2012 at 4:24pm

Trig/Precal
An airplane flies on a compass heading of 90° at 310 mph. The wind affecting the plane is blowing from 332° at 40 mph. What is the true course and ground speed of the airplane?
Friday, July 6, 2012 at 7:37pm

Alg/Trig
Write an equation of a circle with center (2, 3) and radius 4.5.
Friday, July 6, 2012 at 1:13pm

trig HELP
A barn is 30ft. wide by 60ft long; the rafters make an angle of 40degrees with the horizontal. Find the area of each of the two gable ends and the area of the roof. Please Include Solution And If Possible An Illustration. Thank You In Advance :)
Thursday, July 5, 2012 at 9:51am

Algebra & Trig
at a throwing speed pf 12.2 meters per seconds,what is the angle that produce a distance of 13 meters
Wednesday, July 4, 2012 at 6:24pm

Algebra & Trig
calculate the velocity of 10 meters per second with an angle of 30 degrees
Wednesday, July 4, 2012 at 6:20pm

trig
determine the period of y = tan 2x
Wednesday, July 4, 2012 at 10:47am

trig
Find the radius of a circle which a 59-foot chord subtends an angle of 12degrees at the center. I Just Want To See The Illustration. I Can Handle The Rest. Thank You In Advance =)
Tuesday, July 3, 2012 at 9:51am

trig
using a right triangle with one angle 24 degrees and the opposite side being 57 feet, write an expression to fine the hypotenuse, X? X=57/sin(24) is this correct?
Friday, June 29, 2012 at 11:47pm

trig
a circular chimney pipe with an 8-inch diameter passes vertically from a heater through a metal plate in the roof. the plate has an elliptical hole that measures 8 inches along one axis. if the roof is slanted at an angel of 40 degrees with the horizontal, what is the length ...
Friday, June 29, 2012 at 6:22pm

trig
If tan A = 2 and A belongs to [pie,3pie/2] then the expression cos A divided by sin cubed A +cos cubed A is equal to what?
Friday, June 29, 2012 at 12:41pm

trig
the horizontal speed of an airplane is 173 miles per hour. the magnitude of the planes velocity is 200 miles per hour. what angle is the plane climbing? My answer is Cos-1 173/200. is this correct
Friday, June 29, 2012 at 9:38am

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 800 centimeters tall?
Thursday, June 28, 2012 at 8:10am

trig
sec8A-1/sec4A-1=tan8A/tan2A
Wednesday, June 27, 2012 at 12:53pm

Trig
From a point P on level ground, the angle of elevation of the top of a tower is 27°10'. From a point 23.0 meters closer to the tower and on the same line with P and the base of the tower, the angle of elevation of the top is 51°30'. Approximate the height of ...
Tuesday, June 26, 2012 at 11:14pm

trig
explain how you will find the coordinate of P(14pi/3) if you knew the coordinate of P(pi/3)
Sunday, June 24, 2012 at 3:09am

trig
given cot-A square root of 5, find cot-B at the 4th quadrant.
Saturday, June 23, 2012 at 9:10pm

Trig
Sketch the graph through at least one complete cycle. Label the axes on the coordinate plane. Use your graph to predict the height of point P above the surface of the water when the stopwatch shows 7 seconds. Round to the nearest tenth of a foot. (Enter only the number.)
Thursday, June 21, 2012 at 6:11pm

Trig
P was at its maximum after 5 seconds. Use this information to write the value of the last constant, h. (If the value is a fraction, use a slash to separate the numerator from the denominator without spaces, such as 3/4.)
Thursday, June 21, 2012 at 6:09pm

Trig
Since the center is 6 feet above the water, the horizontal line of symmetry of the sine curve will be 6 units above the x-axis. This information helps you find the value of vertical shift. Write its value.
Thursday, June 21, 2012 at 5:15pm

Trig
Jessica attains a height of 4.7 feet above the launch and landing ramps after 1 second. Her initial velocity is 25 feet per second. To find the angle of her launch, which equation can you use with the given information to solve for θ? (Answer: 1 or 2). Use the equation ...
Thursday, June 21, 2012 at 5:02pm

trig
A guy wire runs from the ground to a cell tower. The wire is attached to the cell tower 150 feet above the ground. The angle formed between the wire and the ground is 40° (see figure). (Round your answers to one decimal place.)
Wednesday, June 20, 2012 at 3:46pm

trig
Two forces of 5 lb. and 14 lb. act on a body at right angles to each other. Find the angle their resultant force makes with the force of 14 lb
Wednesday, June 20, 2012 at 1:50pm

trig
A roadway rises 55ft in horizontal distance of 1/2 mile (1mile=5280ft) Find the tangent of the angle that it makes with the horizontal.
Tuesday, June 19, 2012 at 12:26pm

trig
Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format -- including the parentheses: (#,#). u =(10, 5) -3u=
Friday, June 15, 2012 at 11:15am

trig
A pendulum is 18 feet long. Its central angle is 44º. The pendulum makes one back and forth swing every 12 seconds. Each minute, the pendulum swings _____ feet. (Answer to the nearest foot.)
Thursday, June 14, 2012 at 12:59pm

trig
Use a table of trigonometric values to find the angle è in the right triangle in the following problem. Round to the nearest degree, if necessary. cos è =0.9659 A=? H=20
Wednesday, June 13, 2012 at 4:44pm

Trig
Find sin2theta, cos2theta if csctheta=13/12 and lies in quadrant II. Thank you!
Wednesday, June 13, 2012 at 2:06am

Trig
The length of the base of an isosceles triangle is one fourth the length of one of its legs. If the perimeter of the triangle is 16 inches, what is the length of the base?
Monday, June 11, 2012 at 6:15pm

trig/math
Determine the period, amplitude and phase shift for each given function: A)y = -4 cos 3x + 5 B)y = 2/3 sin (30x-90)-10 c)y = -0.38 tan (x/3+pi/3) d)y = pi cos(2x)+ pi
Monday, June 11, 2012 at 5:17pm

Math/Trig
How would I evaluate these trig functions without using a calculator? U: sin(-13π/6) cot 11π/6 cot(-14π/4) sec 23π/6 Thanks in advance ^^; and if you'd tell me step by step on how to do problems like these I'd be grateful :D
Monday, June 11, 2012 at 5:03am

Calculus
integral of cscx^(2/3)(cot^3)x i know that cot^2x is csc^2(x)-1, but i just don't understand how to solve the cscx^(2/3), any help? i also know that its trig integrals/substitution...
Sunday, June 10, 2012 at 12:05pm

trig
A tunnel for a new highway is to be cut through a mountain that is 260 feet high. At a distance of 200 feet from the base of the mountain, the angle of elevation is 36 degrees. From a distance of 150 feet on the other side of the mountain, the angle of elevation is 47 degrees...
Wednesday, June 6, 2012 at 1:36pm

trig
A tunnel for a new highway is to be cut through a mountain that is 260 feet high. At a distance of 200 feet from the base of the mountain, the angle of elevation is 36 degrees. From a distance of 150 feet on the other side of the mountain, the angle of elevation is 47 degrees...
Tuesday, June 5, 2012 at 8:07pm

trig.
How is it that sin90 is negative?
Wednesday, May 30, 2012 at 9:35pm

trig
solve equation for the exact solutions if possible put answer in degrees. 2tanx/3-tan^2x=1
Wednesday, May 30, 2012 at 7:04am

trig
solve equation for exact solution if possible leave answer in degree sinx/2=square root of 2- sinx/2
Wednesday, May 30, 2012 at 6:59am

Trig
The first 40 rows of seating in a certain section of a stadium have 25 seats, 28 seats, 31 seats, and so on. The 41st through the 75th rows each contain 125 seats. Find the total number of seats in this stadium section.
Wednesday, May 30, 2012 at 12:18am

trig
1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4
Monday, May 28, 2012 at 11:36pm

trig
AB = 8 cm, AC = 6 cm, AD = 7 cm, CD = 2.82 and CAB=50° (a) the length BC (b) The size of angle ABC; (c) The size of angle CAD (d) The area of triangle ACD
Sunday, May 27, 2012 at 5:08pm

trig
An electric pole is supported to stand vertically on a level ground by a tight wire. The wire is pegged at a distance of 6 meters from the foot of the pole. The angle that the wire makes the ground is three times the angle it makes with the pole.
Sunday, May 27, 2012 at 4:35pm

trig
plot of land ABCD such that AB = 85m, BC = 75m, CD = 60m, DA = 50m and angle ACB = . Determine the area of the plot in hectares correct to two decimal places
Sunday, May 27, 2012 at 4:33pm

algebra 2/trig
x+5 1 ------- - 1= ------- x^2-2x x^2-2x
Sunday, May 27, 2012 at 1:23pm

Calc- Trig Substitution
integral of dx/square root(x^2-64) My answer is: ln (x/8 + square root(x^2-64)/8) +c is this right?
Friday, May 25, 2012 at 2:23am

trig
Solve cos x-1 = sin^2 x Find all solutions on the interval [0,2pi) a. x=pi, x=pi/2, x= 2pi/3 b. x=3pi/7, x=pi/2, x=2pi/3 c. x=3pi/7, x=3pi/2, x=3pi/2 d. x=pi, x=pi/2, x=3pi/2
Wednesday, May 23, 2012 at 11:12pm

trig
evaluate the expression tan (257pi/4) a.-1 b. -(sqrt2)/2 c. 1 d. (sqrt2)/2
Wednesday, May 23, 2012 at 9:44pm

trig
A tree casts a shadow of 27 meters when the angle of elevation of the sun is 26 degrees. Find the height of the tree to the nearest meter. a. 24 m b. 15 m c. 320 m d. 13 m
Wednesday, May 23, 2012 at 9:40pm

trig
a voltmeter's pointer is 3 cm in length. find the degrees through which is rotates when it moves 1.1 cm on the scale?
Wednesday, May 23, 2012 at 11:11am

trig
6. Compute the modulus and argument of each complex number. I did a-c and f. D. -5 E. -5+5i G. -3-4i 7. Let z= -5sqrt3/2+5/2i and w= 1+sqrt3i a. convert z and w to polar form b. calculate zw using De Moivres Theorem c. calculate (z/w) using De M's theorem Please help with ...
Wednesday, May 23, 2012 at 12:41am

trig
Find all solutions of cos 2x + √2/2 =0. a) + or - 3/8pi +Kpi b) 2/3pi + Kpi, 5/3pi + Kpi c) + or - 2/5 +Kpi d) 2/3 pi + 2Kpi, 5/3pi + 2Kpi I really need help on this question :(
Tuesday, May 22, 2012 at 11:27pm

Trig
what are the rectangular coordinates of (-2(pi/6))? please help.
Tuesday, May 22, 2012 at 11:25pm

math trig
ln(2x-5)= 4 how do i this problem? thanks!
Monday, May 21, 2012 at 10:45pm

TRIG
I need to state the period and 2 consecutive asymptotes on the graph for the following questions. 1: y = -3 tan pi*x period: pi (?) asymptotes: ? 2: y = 2 sec 4x period: ? asymptotes: ? 3: y = csc (x/3) period: ? asymptotes: ? 4: y = 3 cot (pi*x/2) period: ? asymptotes: ?
Monday, May 21, 2012 at 6:03pm

graphing trig functions
given y=(3x+2pi) how would i graph one period this without a calculator? amplitude:1 period: 2pi/b = 2pi/3 is this correct? what is the minimum and maximum points?
Sunday, May 20, 2012 at 10:15pm

trig
how can you find points of a tri equation at orgin 1/4, 1/2, 3/4, and end of the period
Sunday, May 20, 2012 at 9:53pm

Trig
Find two values of theta that satisfy the equation. give your answers in degrees (0degrees <theta<360degrees ) and radians (0<theta<2pi) a. sin θ= sqrrt3/2 b.sin θ= - sqrrt3/2
Saturday, May 19, 2012 at 10:44pm

Trig
Find the radian measure of the central angle of a circle of radius r that intercepts an arc of length s.? Radius, r=16 ft Arc length, s=10 ft
Friday, May 18, 2012 at 12:51pm

graphing trig functions
for graphing basic trig functions such as y=2sinx or y=1/3cosx, how do you know what the points are to graph with out using a calculator?
Friday, May 18, 2012 at 12:31am

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2x-cos6x), 1/2(sin6x+sin2x), sin6x-sin2x
Thursday, May 17, 2012 at 9:38pm

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2x-cos6x), 1/2(sin6x+sin2x), sin6x-sin2x
Thursday, May 17, 2012 at 7:18pm

trig
find the angle between vector U=<2,3> and V=<1,-5> answers: 88 degrees, 45 degrees, 135 degrees, or 92 degrees...?
Thursday, May 17, 2012 at 7:13pm

trig function
Suppose f(x)=cos x - sin x and g(x)=cos x + sin x. Explain why the graph of (fxg)(x) is equivalent to the graph of h(x)=cos x after it has been horizontally compressed by a factor of 1/2. Please help, thank you!
Thursday, May 17, 2012 at 7:10pm

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