Saturday

December 27, 2014

December 27, 2014

**Recent Homework Questions About Trigonometry**

Post a New Question | Current Questions

**trig**

If (m+2)sin ø + (2m-1)cos ø = 2m+1 then tan ø is equal to
*Wednesday, May 29, 2013 at 2:54am*

**Math-Trig**

A ball is tossed up in the air at an angle of 70 degrees with the horizontal and with an initial velocity of 36 ft/sec. What is the position of the ball 1 second after it is released? When will the ball hit the ground? What is the maximum height the ball will reach? How far in...
*Tuesday, May 28, 2013 at 2:47pm*

**trig**

A security camera needs to be set so that the angle of view includes the area from a doorway to the edge of a parking lot.The doorway is 16m from the camera. the edge of the parking lot is 24m for the camera. the doorway is 28m from the edge of the parking lot. what angle of ...
*Monday, May 27, 2013 at 12:49am*

**trig**

in the diagram below.A,B and C are three points in the same horizontal plane and AD is a vertical tower.AC=AB=x and DC=DB.the angle of elevetion of D from C is alpha and DB^C=theta 1.express DC in terms of x trigonometry value of alpha 2.prove that BC=2xcostheta/cos alpha
*Sunday, May 26, 2013 at 10:54am*

**trig**

please am stucked help me.in the diagram below.A,B and C are three points in the same horizontal plane and DC is a vertical tower.AC=AB=x and D^C=DB.the angle of elevation of D from C is alpha and DB^C=theta
*Sunday, May 26, 2013 at 7:31am*

**How to get quick responses to your math questions**

Math is a wide subject, ranging from K to 11, college and university. Then there is algebra, trigonometry, geometry, arithmetic, calculus, number theory, ... etc. Not all teachers answer all math questions (many do). If you would give a little more detail on which branch of ...
*Saturday, May 25, 2013 at 9:45am*

**trig**

A hiker walks 900m east and 500m south .Find the bearing of the finishing position from the staring point?
*Saturday, May 25, 2013 at 3:44am*

**trig**

TRIG Identities, Gr. 12: Prove: cot4x=1-tan^2x/2tan2x
*Thursday, May 23, 2013 at 2:56pm*

**TRIG Help help help test tommarow**

A TV tower stands on top of the Empire State building. From a point (on the ground) 1150 feet from the base of the building, the angle of elevation to the top of the TV tower is 52 degrees. If the building is 1250 feet tall, what is the length of the TV tower?
*Wednesday, May 22, 2013 at 6:48pm*

**TRIGONOMETRY**

Can someone please give me a step by step answer on how to find the complex cube roots of 8(cos(4π/5)+isin(4π/5))? I need to know how to do this for my trig final next week.
*Friday, May 17, 2013 at 5:01pm*

**TRIGONOMETRY**

I don't understand how to convert -3-4i to polar coordinates. I need to know how so I am ready for my trig final next year. Can someone please show me step by step how to solve this? Thanks
*Friday, May 17, 2013 at 3:31pm*

**TRIGONOMETRY**

Can someone please show me step by step how to calculate the modulus and the argument for these complex numbers? I have a trig final next week and I am trying to finish this study guide so I am prepared. Thank you so much! If you can, please show my how you get the answer so I...
*Friday, May 17, 2013 at 9:11am*

**TRIGONOMETRY**

Can you please help me with this question on my study guide for my trig final? Thanks! I'd also appreciate if you can check out my other postings and check my work for some other study guide questions. I want to make sure I'm ready for my final. :) 4. Transform each ...
*Thursday, May 16, 2013 at 11:29am*

**TRIGONOMETRY**

Can you check my work, please? This is for a trig study guide for my final next week. I'd like to know if I'm doing this right. :) 2. The polar coordinates of a point are given. Find the rectangular coordinates of each point. a. (5,(π / 4)) b. (-2,(π / 6)) ...
*Thursday, May 16, 2013 at 11:26am*

**TRIGONOMETRY**

Can you please help me with this question on my study guide for my trig final? Thanks! I'd also appreciate if you can check out my other postings and check my work for some other study guide questions. I want to make sure I'm ready for my final. :) 3. The rectangular ...
*Thursday, May 16, 2013 at 11:13am*

**trig**

Sinxcosy(cotxtany-1)
*Wednesday, May 15, 2013 at 12:16pm*

**trig**

Sinxcosy(cotxtany-1)
*Wednesday, May 15, 2013 at 12:15pm*

**trig**

There are 15,000 endive lettuce seeds in an ounce and 300 seeds in a packet. The seeds cost $1.50 per packet. What is the cost, in dollars, of one ounce of seeds?
*Wednesday, May 15, 2013 at 10:04am*

**trig**

if 5cos A plus 3=0 and 180<A<360..without using a calculator and with the aid of a diagram,determine the value of 1.1 sinA plus cosA 1.2 tanA *sinA
*Monday, May 13, 2013 at 11:52am*

**Trig**

The postal service places a limit of 84 inches on the combined lenght and girth (distance around) of a package to be sen parcel post. What Dimensions of a rectangular box with square cross-section will contain the largest volume that can be mailed?
*Sunday, May 12, 2013 at 11:32pm*

**TRIG**

in an arithmetic sequence a1=4 and d=8 which term is 428 Show your work
*Saturday, May 11, 2013 at 8:32pm*

**TRIG**

what is the explicit formula for the sequence 3,7,11,15
*Saturday, May 11, 2013 at 8:30pm*

**TRIG**

determine the sum of the first 100 even integers SHOW YOUR WORK
*Saturday, May 11, 2013 at 8:29pm*

**TRIG**

the population of a certain city is 1.3 million people. if the population is growing at the rate of 4% per year what will the population be in 8 years
*Saturday, May 11, 2013 at 8:28pm*

**TRIG**

What is the 6th term of the geometric series with a1= -5 and r=2.5
*Saturday, May 11, 2013 at 8:25pm*

**trig identites**

since sin2x+√3cos2x=2sin(2x+60) find the general solution for the equation sin2x+√3cosx=0 thank you
*Friday, May 10, 2013 at 7:35pm*

**math**

simplify sin(540-2x) this is to do with trig
*Friday, May 10, 2013 at 10:13am*

**Trig**

Verify the identity. (secx + tanx)/(secx - tanx) = (1 + 2sinx + sin(^2)x)/cos(^2)x
*Thursday, May 9, 2013 at 2:16pm*

**Trig**

Verify the identity. 1/(tanx-secx) + 1/(tanx+secx) = -2tanx
*Thursday, May 9, 2013 at 1:54pm*

**math trig**

If a ferris wheel with a 20.5 meter radius, how high would one car be from the loding dock at these given angles trveled by the rider?: 90 135 180 225 270 315 405 450 495 and 540?
*Thursday, May 9, 2013 at 10:40am*

**math trig**

If a ferris wheel has a radius of 20.5meters, how tall would a 45 degree angle be?
*Thursday, May 9, 2013 at 10:28am*

**Honors Trig**

a plane is flying in the direction of 190 degrees with an air speed of 400 mph. Its course and ground speed are 200 degrees and 350 mph respectively. What is the speed and direction of the wind?
*Wednesday, May 8, 2013 at 6:30pm*

**trig**

The angle of depression as measured from the top of a 41 foot 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?
*Wednesday, May 8, 2013 at 2:41pm*

**Trig**

Use sum and difference identitites to find the exact value of co 15 degrees
*Wednesday, May 8, 2013 at 11:56am*

**trig identities**

Find the exact value of cos (2theta) given csc theta = 8/3 and 0 < theta < pi/2
*Wednesday, May 8, 2013 at 1:02am*

**trig**

find the minimum and maximum value of sin100 degree plus cos100 degree
*Tuesday, May 7, 2013 at 4:36pm*

**trig**

If a flywheel 8 ft. in diameter rotates at 80 rpm., what is the linear velocity of a point on the outside edge, in feet per minute in terms of pi?
*Tuesday, May 7, 2013 at 9:43am*

**Trig**

cos[(tan^-1(3/4))+(cos^-1(9/41))]
*Monday, May 6, 2013 at 10:10pm*

**Trig **

csc thea= -2, quadrant 4. what are the six trig functions?
*Monday, May 6, 2013 at 4:17pm*

**trig**

A slide is attached to the side of a tree house. The height of the tree house is 6 less than double the distance from the baswe of the tree to the base of the slide. The length of the slide is 3 more than the height of the tree house. Find the length of the slide.
*Sunday, May 5, 2013 at 9:00pm*

**Advanced Functions/Trig**

Prove the identity: cos^4 x + sin^4 x = 1 - (1/2)sin^2 (2x)
*Sunday, May 5, 2013 at 11:16am*

**Trig(I think)**

Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of 1m/s, how fast is the area of the spill increasing when the radius is 30m?
*Monday, April 29, 2013 at 8:02pm*

**trig**

at one point in the day, a tower that is 150 feet high casts a shadow that is 210 feet long. Find, to the nearest tenth of a degree, the angle of elevation of the sun at that point
*Sunday, April 28, 2013 at 12:10pm*

**trig**

cos(t)=3/5 determine the exact value of t to the nearest degree
*Saturday, April 27, 2013 at 3:39pm*

**trig**

solve the point given below is on the terminal side of an angle0. find the exact value of the six trigonometric functions of 0. (10,-10)
*Saturday, April 27, 2013 at 2:27pm*

**trig**

how many solutions (answers) does this equation has? sinx=sin1
*Saturday, April 27, 2013 at 1:53pm*

**trig**

how to do this? how much does this equals? 2cos160*cos140*cos100
*Saturday, April 27, 2013 at 1:49pm*

**trig**

Convert 11pi/5 radians into degrees.
*Wednesday, April 24, 2013 at 1:45pm*

**trig**

Convert 11pi/5 radians into degrees.
*Wednesday, April 24, 2013 at 1:45pm*

**Trig**

A parabola has its vertex on the graph of the line y=3x+1 and passes through (1,10). If it is the same size,? shape, and direction as the graph of y=3x^2, find the equation (s) of all possible parabolas Thanks!!!
*Wednesday, April 24, 2013 at 6:39am*

**Trig**

Convert 2xy = 1 to polar form.
*Monday, April 22, 2013 at 7:04pm*

**Trig**

Rewrite -2x^2 + sqrt(3)xy - y^2 +2 = 0 with the xy term eliminated. Round terms to nearest hundredth.
*Monday, April 22, 2013 at 6:39pm*

**trig**

A kite is in the shape of a quadrilateral with two pair of congruent adjacent sides. The lengths of two sides are 20.0 inches and the lengths of the other two sides are 35.0 inches. The two shorter sides meet at an angke of 115 degrees. A. Find the length of the diagonal ...
*Sunday, April 21, 2013 at 6:09pm*

**trig**

Two tracking stations are on the equator 135 miles apart. A weather balloon is located on a bearing of N 37 degrees E from the weastern station and on a bearing of N 19 degrees E from the eastern station. How far is the balloon from the weastern station?
*Sunday, April 21, 2013 at 3:32pm*

**trig**

A pole is braced by two wires that extended from the top of the pole to the ground. The lengths of the wires are 16 feet and 18 feet and the measure of the angle between the wires is 110 degrees. Find, to the nearest foot, the distance between the points at which the wires are...
*Sunday, April 21, 2013 at 2:45pm*

**Trig**

A plane has a speed of 250mph and flies with a bearing of N35degE. The wind is blowing from the west at 25 mph with a heading of due east. What is the actual speed and heading of the plane? Round to one decimal place.
*Sunday, April 21, 2013 at 1:05pm*

**Advanced Functions/Trig**

Prove the following: sin(x+y)sin(x-y) = cos^2 (y) - cos^2 (x)
*Sunday, April 21, 2013 at 11:47am*

**Trig**

This has to do with vectors...I'm wondering if I set up the diagram correctly? A plane has a speed of 250mph and flies with a bearing of N35degE. The wind is blowing from the west at 25 mph with a heading of due east. What is the actual speed and heading of the plane?
*Saturday, April 20, 2013 at 4:50pm*

**Trig**

This has to do with dot products (I can't make the arrow above the u, i, or j). Given u = 4i - 6j and v = -3i + 5j, find 4u-(1/2)v Am I just supposed to plug in what u and v are equal to in 4u-(1/2)v? If so, is the answer (35/2i - 53/2j)
*Saturday, April 20, 2013 at 4:15pm*

**trig**

Solve exactly over the indicated interval: 2sinx+cscx=3, 0<theta<360
*Thursday, April 18, 2013 at 12:03am*

**Trig**

A 12 foot ladder leans against a building. The top of the ladder leans against the wall 10.5 feet from the ground. What is the angle formed by the ground and the ladder? Assume its a right triangle.
*Wednesday, April 17, 2013 at 11:52pm*

**Trig**

solve over the indicated interval expressed in degrees to 2 decimal places. sec(theta/2)=1.4275, 0<theta<360degrees
*Wednesday, April 17, 2013 at 11:25pm*

**trig**

solve exactly over the indicated interval: cot(theta)=0, all real numbers
*Wednesday, April 17, 2013 at 9:33pm*

**trig**

Find minimum value of 2cos x + 2cos y
*Wednesday, April 17, 2013 at 8:31am*

**trig**

Find minimum value of 2cos x + 2cos y
*Wednesday, April 17, 2013 at 8:28am*

**trig**

Find minimum value of 2cos x + 2cos y
*Wednesday, April 17, 2013 at 8:27am*

**Math-Trig**

Find all angles in degrees that satisfy each equation. tan(a)+rad3=0
*Tuesday, April 16, 2013 at 5:32pm*

**Trig**

From a certain distance from the base of a Giant Sequoia tree a surveyor determines that the angle of elevation to the top of the tree is 47deg. The surveyor then walks 100 feet away from the tree and determines that the angle of elevation to the top of the tree is now 37deg. ...
*Tuesday, April 16, 2013 at 5:06pm*

**Trig**

Rewrite 6x^2 - sqrt(3)xy + 5y^2 - 9 = 0 with the xy term eliminated.
*Tuesday, April 16, 2013 at 12:12pm*

**Trig**

Convert this equation so that it could be entered into a calculator in the standard y= format. x^2 - 4xy + 4y^2 - 8y + 2 = 0
*Tuesday, April 16, 2013 at 12:11pm*

**Trig**

Solve the multiple-angle equation. (Enter your answers as a comma-separated list. Let n be any integer. Enter your response in radians.) sec 9x = 2
*Monday, April 15, 2013 at 8:47pm*

**math**

In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?
*Sunday, April 14, 2013 at 4:57pm*

**Maths-trig**

Prov tht 1-sin2X/sinX-cosX=sinX-cosX
*Friday, April 12, 2013 at 3:11pm*

**trig**

an airplane has an airspeed of 430 miles per hour at a bearing of 135 degrees. the wind velocity is 35 miles per hour in the direction N30degreesE. Find the resultant speed and direction of the plane.
*Friday, April 12, 2013 at 1:25pm*

**trig**

What happens when you try to elevate sin-1(3/2)?
*Thursday, April 11, 2013 at 5:19pm*

**Precalc with Trig**

What value(s) of x from 0 to 2pi solve the following equation: cos squared x - cos x - 6 = 0
*Thursday, April 11, 2013 at 2:04pm*

**Math**

sec(alpha) = -4(√(5))/5 find exact values at alpha for the remaining five trig functions
*Wednesday, April 10, 2013 at 5:46pm*

**trig**

Solve rounding to 2 decimal places. 9cosx + 4cos(2x) + 1 = 0 over 0° ≤ x < 360° Thanks to anyone that can help! I'm totally stumped.
*Wednesday, April 10, 2013 at 2:40pm*

**Trig**

Solve exactly over 0 ≤ θ < 2π secx + tanx = 1
*Wednesday, April 10, 2013 at 2:24pm*

**trig**

GIVEN THE ANGEL ALFA WITH COS ALFA = -1/a. IF ALFA IN QUADRANT TWO, THE VALUE OF SIN ALFA IS....
*Wednesday, April 10, 2013 at 12:42pm*

**trig**

i need to know how to do evaerything because i am stupid
*Wednesday, April 10, 2013 at 9:39am*

**applied calculus**

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit differentiation. (Use questions 1 ...
*Tuesday, April 9, 2013 at 9:26pm*

**applied calculus**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*Tuesday, April 9, 2013 at 9:25pm*

**Physics**

Please help! I've tried solving this with trig but I can't seem to figure out what I've been doing wrong. Two positive point charges, each of which has a charge of 2.3 × 10−9 C, are located at y = +0.60 m and y = −0.60 m. A)Find the magnitude of ...
*Tuesday, April 9, 2013 at 7:25pm*

**Applied calculas**

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit differentiation. (Use questions 1 ...
*Monday, April 8, 2013 at 5:32pm*

**Applied calculas**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*Monday, April 8, 2013 at 5:31pm*

**Trig**

Solve the equation on 0° ≤ θ < 360° and express in degrees to two decimal places. sin(2θ) = -0.7843 I've gotten 308.345° (QIV) and 231.655° (QIII). I'm unsure how to get the answer though? The final answer is: 115.83°, 295.83°...
*Monday, April 8, 2013 at 3:14pm*

**trig**

I am trying to get wxMaxima to give me arcsin(4/5), either in radians or degrees. I am using a: 4/5$ b:asin(a)$ print("the angle is ", b)$ But it returns the angle is asin(4/5) How do I get wxMaxima to give me the angle? I want .927 radians or 53.1 degrees.
*Monday, April 8, 2013 at 1:06pm*

**trig**

if sin 41'=m. write m in terms of cos 41'
*Monday, April 8, 2013 at 9:24am*

**Trig**

Find the exact values of sin 2 theta, cos 2 theta and tan 2thea using the double angle formula sin theta = 3/4 , pi/2 < theta < pi
*Monday, April 8, 2013 at 2:31am*

**trig**

i nead to find to the nearest degree all values of theta in the interval 0 x 360 that satisfy the equation 3 cos 2 theta+ sin theta-1=0
*Sunday, April 7, 2013 at 10:33pm*

**Trig**

Solve the trig equation exactly over the indicated interval. tanθ = 0, all real numbers I know the answer is πn, but I don't understand how they got this. I get that tanθ = 0 on π and 2π on the unit circle, so did they just put n on the end of &#...
*Sunday, April 7, 2013 at 1:48pm*

**Precalc with Trig**

What value(s) of theta (0 less than or equal to theta less than or equal to 2pi) solve the following equation: cos squared theta - cos theta - 6 = 0
*Sunday, April 7, 2013 at 1:42pm*

**Precalculus with Trig**

Rewrite the following expression as an algebraic expression in x: cos(arcsin(x))
*Sunday, April 7, 2013 at 1:38pm*

**trig**

If it is given that tan(A-B)=tanA-tanB/1+tanAtanB and tanP-1/1+tanP=tan195 find p
*Saturday, April 6, 2013 at 3:44pm*

**trig**

Indoor steps generally are steeper and have smaller landings. A staircase has a 9 inch vertical rise per step to get to the second floor of a house. If the angle of elevation is 36.8 degrees and there are 16 feet of horizontal space total for each of the landings combined, ...
*Wednesday, April 3, 2013 at 1:34pm*

**Trig**

Sin^2 b(1 +cot^2 b) =1
*Wednesday, April 3, 2013 at 10:14am*

**trig**

An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is blowing directly north at 60 mi/hr. Approximate the required airspeed and compass heading
*Monday, April 1, 2013 at 9:33pm*

**Trig**

Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x
*Sunday, March 31, 2013 at 9:16pm*

**Math: Solving Trig Equation**

9tan (x) - 9 sec^2 (x)/ tan (x)
*Sunday, March 31, 2013 at 1:16am*

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