Monday

January 16, 2017
**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 that 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 0Â° ≤ x < 360Â° 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 Ã— 10−9 C, are located at y = +0.60 m and y = −0.60 m. A)Find the ...

*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 0Â° ≤ θ < 360Â° and express in degrees to two decimal places. sin(2θ) = -0.7843 I've gotten 308.345Â° (QIV) and 231.655Â° (QIII). I'm unsure how to get the answer though? The final answer ...

*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 250Â° 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*

**trig**

Sandra wants to find the height of a moutain. From her first location on the ground, she finds the angle of elevation to the top of the mountain to be 35 degrees 15 minutes. After moving 1000 meters closer to the moutain on level ground, she finds the elevation to be 50 ...

*Wednesday, March 20, 2013 by Anonymous*

**Trig**

If 180<A<270 and sinA= -radical(5)/3, find tan(1/2)A.

*Tuesday, March 19, 2013 by Joseph79*

**trig**

I keep trying to find the power reducing formula for sin^4(x), but I can't seem to get all the fractional parts correct. The answer I should be getting is: sin^4(x)=(1/8)cos4x-(1/2)cos2x+(3/8) I can only get this far knowing feeling confident. When I go further I start ...

*Tuesday, March 19, 2013 by Josh*

**Math**

What is the inverse trig function cotangent of square root of 3/3? What is the value?

*Tuesday, March 19, 2013 by Bob*

**Trig**

True or False: For a trignometric function, y = f(x), then x = f^-1(y). Explain your answer. Thanks.

*Tuesday, March 19, 2013 by Clarissa*

**Trig**

True or False: For a one-to-one function, y = f(x),then x = F^-1(y). Explain your answer. Please help.

*Tuesday, March 19, 2013 by Clarissa*

**Trig**

What is the exact value of tan(s+t) if sin(s+t)=56/65. And cos(s)=5/13 and sin(t)=4/5. Everything is in the first quadrant

*Tuesday, March 19, 2013 by Heather*

**Trig**

A pulley with a diameter of 24 inches is driven by a belt which is moving 1045 ft/min. How many revolutions per minute are made by the pulley?

*Tuesday, March 19, 2013 by Katelyn*

**Trig**

How do I find the exact value of sin (pi/24)?I am crying

*Sunday, March 17, 2013 by Luis*

**trig**

How do I find the exact value of sin (pi/24)?

*Sunday, March 17, 2013 by Luis*

**Trigonometry**

Hi, I really need help in understanding how to solve trig equations. How do you solve this equation? Solve the equation on the interval 0 < or equal to x < or equal to 2pi. sinx = (square root of 3)/2 I appreciate your help. Thank you!

*Sunday, March 17, 2013 by Leah*

**trig**

A pole is braced with a wire from the top of a pole to the ground. The wire is 100 feet long and makes an angle of 40Â° with the ground. Find the height of the pole.

*Friday, March 15, 2013 by Anonymous*

**trig**

A road runs from the base of a mountain. From two points 235 meters apart on the road, the angles of elevation to the top of the mountain are 43 and 30. how high above the road is the mountaintop?

*Wednesday, March 13, 2013 by nicole HELP*

**trig**

A road runs from the base of a mountain. From two points 235 meters apart on the road, the angles of elevation to the top of the mountain are 43 and 30. how high above the road is the mountaintop?

*Wednesday, March 13, 2013 by nicole*

**trig**

A road runs from the base of a mountain. From two points 235 meters apart on the road, the angles of elevation to the top of the mountain are 43 and 30. how high above the road is the mountaintop?

*Wednesday, March 13, 2013 by nicole*

**trig**

cos Ã¨ = 0.9659 A = ? H = 20

*Wednesday, March 13, 2013 by ben*

**Trig**

a. Form a pair of simultaneous equations by letting y1 equal the left side and y2 equal the right side of sqrt 5-x=1. b.Repeat part (a) with the equivalent equation sqrt 5=x+1 c. Repeat part (a) with the equivalent equation sqrt 5-x-1=0

*Tuesday, March 12, 2013 by Lavanda*

**Trig**

Whats the height of a flagpole if a student stand 37feet from it and determines the angle of elevation to be 34degrees and her eyes are 5.3 feet from the ground(round to the nearest whole number)

*Monday, March 11, 2013 by David*

**Trig**

the number of solutions of sin x= -sqrt3/2 for x between 0 and 2pi

*Monday, March 11, 2013 by David*

**Trig**

the height of a flagpole if a student stands 37 feet from it and determines the angle of elevation to be 34 degrees and her eyes are 5.3 feet from the ground.

*Monday, March 11, 2013 by David*

**trig **

The radian measure of an angle of 182 degrees is ?

*Wednesday, March 6, 2013 by tyler*

**trig**

use an angel sum identity to verify cos2theta = -2cos^@-1

*Monday, March 4, 2013 by cooper roschuk*

**Trig**

help please!: (sinx + sin2x +sin3x) / (cosx + cos2x + cos3x) = tan2x

*Sunday, March 3, 2013 by Aiden*

**trig**

cos(2x+4h)-cos(2x+2h)=?

*Sunday, March 3, 2013 by Anonymous*

**trig**

cos(2x+4h)-cos(2x+2h)=?

*Sunday, March 3, 2013 by Anonymous*

**trig**

cos(2x+4h)-cos(2x+2h)

*Sunday, March 3, 2013 by Anonymous*

**Trig**

A plane if flying at 200 mph with a heading of 45 degrees and encounters a wind of 100 mph from the west. What is the resulting velocity and heading?

*Sunday, March 3, 2013 by Sarah*

**trig**

10sinB+5 = sinB+5

*Friday, March 1, 2013 by brittany*

**trig**

If sin theta is equal to 5/13 and theta is an angle in quadrant II find the value of cos theta, sec theta, tan theta, csc theta, cot theta.

*Thursday, February 28, 2013 by Julise Alliance *

**trig**

solve tan2x = -28/45 Thank you

*Thursday, February 28, 2013 by Kevin*

**trig**

A population of wolves in a country is represented by the equation p(t)=80(0.98)^t, where t is the number of years since 1998. Predict the number of wolves in the population in the year 2008. how many years will it take for the population of wolves to reach 500?

*Tuesday, February 26, 2013 by Anonymous*

**Trig**

Four wires support a 40-meter radio tower. Two wires are attached to the top and two are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower. What is the total length of wire needed?

*Tuesday, February 26, 2013 by Tina*

**trig**

Four wires support a 40-meter radio tower. Two wires are attached to the top and two wires are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower.

*Tuesday, February 26, 2013 by Tina*

**trig**

sec0+ten0-1/tan0+sec0+1=1+sin0/cos0

*Sunday, February 24, 2013 by rahul*

**Trig identities:(**

Sin4A - cos4A = sin2A - cos2A Can i just square root the left side??:O

*Saturday, February 23, 2013 by Kristien*

**trig**

(sec^2x-1)(csc^2x-1)=1 prove the following identity ive been stuck on this for hours please help

*Friday, February 22, 2013 by Anonymous*

**trig sub question**

Hello, I have a question concerning trigonometric substitution. let's say we have integral of dx/sqrt(9x^2 + 4), so after doing a few steps we have: 2/3 integral of sec0/sqrt((2tan0)^2 + 4*) d0 (the * is for later on) the next step turns into: 2/3 integral of sec0/(sqrt(...

*Friday, February 22, 2013 by Tom*

**trig**

What is the length of side c to the nearest whole number if side a 105 and angle A 65 degrees and angle B 37 degrees?

*Friday, February 22, 2013 by Anonymous*

**trig**

If cot x = .78, what is tan x?

*Thursday, February 21, 2013 by m*

**trig**

Express sin4xcos3x as a sum or differences of sines and cosines

*Thursday, February 21, 2013 by Fabian onyango ndege*

**Trig **

A pendulum swings through an angle of 22 degrees each second. If the pendulum is 30 inches long, how far does its tip move each second?

*Wednesday, February 20, 2013 by Courtney*

**Trig**

Is the angle 11pi/12 on the unit circle the same as the angle -pi/12? I'm thinking it would be, but I'm not sure.

*Tuesday, February 19, 2013 by Casey*

**trig**

An object Is propelled upward at an angle θ, 45Â° < θ<90Â°, to the horizontal with an initial velocity of (Vo) feet per second from the base of a plane that makes an angle of 45Â° with the horizontal. If air resistance is ignored, ...

*Tuesday, February 19, 2013 by Anonymous*

**trig**

To determine the distance to an oil platform in the Pacific Ocean, from both ends of a beach, a surveyor measures the angle to the platform from each end of the beach. The angle made with the shoreline from one end of the beach is 83 degrees, from the other end 78.6 degrees. ...

*Tuesday, February 19, 2013 by Don*

**trig.**

8x^3+4x^2-4x solution sets

*Monday, February 18, 2013 by jackie*

**Trig**

Verify the identity. cos 4x + cos 2x = 2 - 2 sin^2(2x) - 2 sin^2 x

*Sunday, February 17, 2013 by Mitchel*

**Trig**

Three circles with radii of 4, 5, and 6 cm, respectively, are tangent to each other externally. Find the angles of the triangle whose vertexes are the centers of the circles.

*Sunday, February 17, 2013 by Chris*

**trig**

cos^(2) 20 degrees + sin^(2) 20 degrees +pi/2

*Sunday, February 17, 2013 by Anonymous*

**Trig**

The diagonals of a parallelogram intersect at a 42◦ angle and have lengths of 12 and 7 cm. Find the lengths of the sides of the parallelogram. (Hint: The diagonals bisect each other.)

*Sunday, February 17, 2013 by Chris*

**Trig Identities**

Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = sin^2x - cos^2x 3) 1/cosx - cosx = sin x tan x 4) sin x + tan x =tan x (1+cos x) 5) 1/1-sin^2x= 1+tan^2 x How in the world do I prove this...please help... I appreciateyour time thankyou soo much!!

*Sunday, February 17, 2013 by Deepa*

**trig**

a lighthouse is located at point A. a ship travels from point B to point C. At point B,, the distance between the ship and the lighthouse is 7.5km. At point C the distance between the ship and the lighthouse is 8.6km. Angle BAC is 58 degrees. Determine the distance between B ...

*Thursday, February 14, 2013 by Danielle*

**Trig**

A Ferris wheel is 40 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 2 minutes. How many minutes of the ride are ...

*Wednesday, February 13, 2013 by Christine*

**MATHS**

Find the lengths of the missing sides in the triangle. Write your answers as integers or as decimals rounded to the nearest tenth. The diagram is not drawn to scale. triangle has sides 7, Y and X and 45 degree angle can someone show me how to do this? im supposed to use trig ...

*Wednesday, February 13, 2013 by Corie*

**trig**

Given the function y = 3cos(3x + pi), identify: Amplitude (if applicable, give the answer in fractional form) Period (in radians as a multiple of pi - note: do not write "rad" or "radians" in your answer) Phase Shift (if the shift is right, enter + and if ...

*Wednesday, February 13, 2013 by kikine*

**Trig/precalc**

Cos[x + (7 Pi)/4] + Cos[x - (7 Pi)/4] = 1

*Tuesday, February 12, 2013 by Joe*

**trig**

ABC- with angles AB, and C and sides AB,BC, and AC, angle B is right 90degree angle, if sin of angle A is 0.5, side BC 8in., what is length of AC

*Tuesday, February 12, 2013 by maranade*

**trig**

As a hot-air balloon rises vertically, its angle of elevation from a point P on level ground d = 140 kilometers from the point Q directly underneath the balloon changes from 15Â°10' to 29Â°30' (see the figure). Approximately how far does the ...

*Monday, February 11, 2013 by soul pancake*

**maths (trig)**

how would you work out tan 50=27/x please help

*Monday, February 11, 2013 by random name*

**trig**

what is the exact value of this equation. cos(20) if it equals pi/4

*Sunday, February 10, 2013 by Anonymous*

**trig**

Two people decide to estimate the height of a flagpole. One person positions himself due north of the pole and the other person stands due east of the pole. If the two people are the same distance from the pole and a = 30 feet from each other, find the height of the pole if ...

*Sunday, February 10, 2013 by Tina*

**math-trig**

tan(t)-sec^2(t)/tan(t)

*Friday, February 8, 2013 by joe*

**trig**

a tower that is a 200 meters is leaning to one side. from a certain point on that side, the angle of elevation to the top of the tower is 70 degree. From a point 55 meters closer to the tower, the angle of elevation is 85 degree. Determine the acute angle from the horizontal ...

*Tuesday, February 5, 2013 by Anonymous*

**trig**

1/tan beta +tan beta=sec^2 beta/tan beta

*Monday, February 4, 2013 by saki*