Saturday

October 1, 2016
**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 by MathMate*

**trig**

A hiker walks 900m east and 500m south .Find the bearing of the finishing position from the staring point?

*Saturday, May 25, 2013 by x*

**trig**

TRIG Identities, Gr. 12: Prove: cot4x=1-tan^2x/2tan2x

*Thursday, May 23, 2013 by Josh*

**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 by Precious*

**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 by Kate*

**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 by Kate*

**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 by Kate*

**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 by Kate*

**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 by Kate*

**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 by Kate*

**trig**

Sinxcosy(cotxtany-1)

*Wednesday, May 15, 2013 by Victor L.*

**trig**

Sinxcosy(cotxtany-1)

*Wednesday, May 15, 2013 by Victor L.*

**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 by Anonymous*

**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 by patience morakile*

**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 by Meg*

**TRIG**

in an arithmetic sequence a1=4 and d=8 which term is 428 Show your work

*Saturday, May 11, 2013 by Alex*

**TRIG**

what is the explicit formula for the sequence 3,7,11,15

*Saturday, May 11, 2013 by Alex*

**TRIG**

determine the sum of the first 100 even integers SHOW YOUR WORK

*Saturday, May 11, 2013 by Alex*

**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 by Alex*

**TRIG**

What is the 6th term of the geometric series with a1= -5 and r=2.5

*Saturday, May 11, 2013 by Alex*

**trig identites**

since sin2x+√3cos2x=2sin(2x+60) find the general solution for the equation sin2x+√3cosx=0 thank you

*Friday, May 10, 2013 by phillip*

**math**

simplify sin(540-2x) this is to do with trig

*Friday, May 10, 2013 by allie*

**Trig**

Verify the identity. (secx + tanx)/(secx - tanx) = (1 + 2sinx + sin(^2)x)/cos(^2)x

*Thursday, May 9, 2013 by Allie*

**Trig**

Verify the identity. 1/(tanx-secx) + 1/(tanx+secx) = -2tanx

*Thursday, May 9, 2013 by Elle*

**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 by Zoe*

**math trig**

If a ferris wheel has a radius of 20.5meters, how tall would a 45 degree angle be?

*Thursday, May 9, 2013 by Zoe*

**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 by Sheryl*

**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 by Anonymous*

**Trig**

Use sum and difference identitites to find the exact value of co 15 degrees

*Wednesday, May 8, 2013 by Christy*

**trig identities**

Find the exact value of cos (2theta) given csc theta = 8/3 and 0 < theta < pi/2

*Wednesday, May 8, 2013 by Sean*

**trig**

find the minimum and maximum value of sin100 degree plus cos100 degree

*Tuesday, May 7, 2013 by ria*

**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 by Garrett*

**Trig**

cos[(tan^-1(3/4))+(cos^-1(9/41))]

*Monday, May 6, 2013 by Hannah*

**Trig **

csc thea= -2, quadrant 4. what are the six trig functions?

*Monday, May 6, 2013 by Shay*

**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 by Kendra*

**Advanced Functions/Trig**

Prove the identity: cos^4 x + sin^4 x = 1 - (1/2)sin^2 (2x)

*Sunday, May 5, 2013 by Zack*

**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 by Kelly*

**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 by ainy*

**trig**

cos(t)=3/5 determine the exact value of t to the nearest degree

*Saturday, April 27, 2013 by Anonymous*

**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 by Anonymous*

**trig**

how many solutions (answers) does this equation has? sinx=sin1

*Saturday, April 27, 2013 by Eee*

**trig**

how to do this? how much does this equals? 2cos160*cos140*cos100

*Saturday, April 27, 2013 by Eee*

**trig**

Convert 11pi/5 radians into degrees.

*Wednesday, April 24, 2013 by danni*

**trig**

Convert 11pi/5 radians into degrees.

*Wednesday, April 24, 2013 by danni*

**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 by Rebekah*

**Trig**

Convert 2xy = 1 to polar form.

*Monday, April 22, 2013 by Lost One*

**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 by Lost One*

**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 by Anonymous*

**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 by Taylor*

**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 by Anonymous*

**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 by Nancy*

**Advanced Functions/Trig**

Prove the following: sin(x+y)sin(x-y) = cos^2 (y) - cos^2 (x)

*Sunday, April 21, 2013 by Zack*

**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 by Mary*

**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 by Mary*

**trig**

Solve exactly over the indicated interval: 2sinx+cscx=3, 0<theta<360

*Thursday, April 18, 2013 by Anonymous*

**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 by Charlie*

**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 by Anonymous*

**trig**

solve exactly over the indicated interval: cot(theta)=0, all real numbers

*Wednesday, April 17, 2013 by Anonymous*

**trig**

Find minimum value of 2cos x + 2cos y

*Wednesday, April 17, 2013 by vikrant *

**trig**

Find minimum value of 2cos x + 2cos y

*Wednesday, April 17, 2013 by vikrant *

**trig**

Find minimum value of 2cos x + 2cos y

*Wednesday, April 17, 2013 by vikrant *

**Math-Trig**

Find all angles in degrees that satisfy each equation. tan(a)+rad3=0

*Tuesday, April 16, 2013 by Savana*

**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 by Mary*

**Trig**

Rewrite 6x^2 - sqrt(3)xy + 5y^2 - 9 = 0 with the xy term eliminated.

*Tuesday, April 16, 2013 by Lost One*

**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 by Lost One*

**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 by Ashley *

**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 by msmith*

**Maths-trig**

Prov tht 1-sin2X/sinX-cosX=sinX-cosX

*Friday, April 12, 2013 by Neo*

**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 by kayleigh*

**trig**

What happens when you try to elevate sin-1(3/2)?

*Thursday, April 11, 2013 by helen*

**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 by Natalie*

**Math**

sec(alpha) = -4(√(5))/5 find exact values at alpha for the remaining five trig functions

*Wednesday, April 10, 2013 by Tina*

**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 by Jodi*

**Trig**

Solve exactly over 0 ≤ θ < 2π secx + tanx = 1

*Wednesday, April 10, 2013 by Lisa*

**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 by nik*

**trig**

i need to know how to do evaerything because i am stupid

*Wednesday, April 10, 2013 by gchmhhchh*

**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 by jack*

**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 by jack*

**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 by Alex*

**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 by jack*

**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 by jack*

**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 by Mary*

**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 by Josh*

**trig**

if sin 41'=m. write m in terms of cos 41'

*Monday, April 8, 2013 by thapelo*

**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 by Jiskhaa*

**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 by Anonymous*

**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 by Anne*

**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 by Natalie*

**Precalculus with Trig**

Rewrite the following expression as an algebraic expression in x: cos(arcsin(x))

*Sunday, April 7, 2013 by Natalie*

**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 by Kale*

**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 by Leia*

**Trig**

Sin^2 b(1 +cot^2 b) =1

*Wednesday, April 3, 2013 by Tay*

**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 by Caroline*

**Trig**

Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x

*Sunday, March 31, 2013 by Katelyn*

**Math: Solving Trig Equation**

9tan (x) - 9 sec^2 (x)/ tan (x)

*Sunday, March 31, 2013 by Kristi*

**Trig**

Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly.

*Thursday, March 28, 2013 by Max*

**Trig**

Use a half-angle identity to find the exact value for sec(x/2) if sinx = -12/13 ; 3pi/2 < x < 2pi

*Thursday, March 28, 2013 by Anna*

**Trig **

How do I use the unit circle to evaluate tan(-3pi/4)

*Monday, March 25, 2013 by Courtney*

**trig**

Find the first two terms a_1 =5 and an=3a _n-1+2

*Sunday, March 24, 2013 by veronica*

**Trig**

prove that tanA divided by the sinA equals the secA

*Sunday, March 24, 2013 by Dominique*