Saturday

February 6, 2016
**trig**

Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 decimal places.
*Sunday, October 2, 2011 by sam*

**alg2/trig**

Which expression is defined for all real numbers? a) x + 3/x^2 b) 5/(x + 2)^2 c)4/(x − 2)^2 d)7/x^2 + 3
*Sunday, October 2, 2011 by jaz*

**trig**

Graph y=-2sin(x/2-pi/2)+3
*Sunday, October 2, 2011 by Anonymous*

**trig**

Question Part Points Submissions Used The angle of elevation to the top of a very tall Building is found to be 7° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building.
*Sunday, October 2, 2011 by sanam*

**trig**

Triangle XYZ has vertexes at X(-4, 5), Y(-3, 5), and Z(-3, 4). Find the measure of angle Y to the nearest degree.
*Saturday, October 1, 2011 by Parker*

**trig**

The captain of a ship at sea sights a lighthouse which is 120 feet tall. The captain measures the the angle of elevation to the top of the lighthouse to be 19 ^\circ. How far is the ship from the base of the lighthouse?
*Saturday, October 1, 2011 by Dan*

**trig**

Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) cos θ = 1/7
*Friday, September 30, 2011 by stellar*

**trig**

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 4 mi apart, to be x = 27° and y = 53°, as shown in the figure. (Round your answers to two decimal places.) (a) Find the distance of the plane from point A. mi (b) Find ...
*Friday, September 30, 2011 by stellar*

**trig**

All solutions in interval [0,2pi) of cosine theta plus one equals zero
*Thursday, September 29, 2011 by Anonymous*

**trig**

All solutions in interval [0,2pi) of cosine theta plus one equals zero
*Thursday, September 29, 2011 by Anonymous*

**trig**

A cashier is unsure whether a group of customers ordered and ate a large or a medium pizza. Medium pizzas have a diameter of 12 inches and large pizzas have a diameter of 16 inches. All that remains is one crust that has an arc length of 4.25 inches. All pizzas are divided ...
*Wednesday, September 28, 2011 by Parker*

**trig**

From a point 45 meters above level ground, a surveyor measures the angle of depression of an object on the ground at 68°. Approximate the distance from the object to the point on the ground directly beneath the surveyor. (Round your answer to two decimal places.)
*Wednesday, September 28, 2011 by Anonymous*

**trig**

Cos(2x+30)-Sin(3x-20)
*Wednesday, September 28, 2011 by Anne*

**trig**

Find a cofunction with the same value as sin 19 degrees
*Tuesday, September 27, 2011 by Jessica*

**trig**

Find all values of x in the interval [0, 2π] that satisfy the equation. 6 sin2(x) = 3
*Tuesday, September 27, 2011 by christopher*

**trig**

Suppose that the point P(13,-30) is on the terminal side of the angle theta in standard position. What is sin(theta)? Give your answer to the nearest thousandth
*Tuesday, September 27, 2011 by zack*

**trig**

Suppose that the point P is the point on the unit circle that is associated by the wrapping function with the number 31. In which quadrant is the point P located?
*Tuesday, September 27, 2011 by zack*

**Trig!**

The identities cos(a-b)=cos(a)cos(b)sin(a)sin(b) and sin(a-b)=sin(a)cos(b)-cos(a)sin(b) are occasionally useful. Justify them. One method is to use rotation matricies. Another method is to use the established identities for cos(a+b) and sin (a+b).
*Tuesday, September 27, 2011 by Elle*

**maths**

in right angled triangle ABC, angleBis90 degree and C is an acute angle of60degree. Also sin m<C=c/b. Find the following trig ratios.(a)mBC/mAB (b)cosec30degree
*Tuesday, September 27, 2011 by Rose*

**Alg/2 Trig**

Given the functions f(x)=-x^2+7 and g(x)=3x+4 find f(g(-5)) Write the composition above using an alternative notation.
*Monday, September 26, 2011 by Alexis*

**trig**

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?
*Monday, September 26, 2011 by Parker*

**Trig**

Given sin theta = -3/5 and 0 is in quad 2, find Cos theta and tan theta
*Wednesday, September 21, 2011 by Betty*

**Trig**

The point (-5/12) is on the terminal side of an angle theta in standard position. Find Sin theta, cos theta and tan theta Thank You!
*Wednesday, September 21, 2011 by Lauren*

**trig**

A woman standing on a hill sees a flagpole that she knows is 65 ft tall. The angle of depression to the bottom of the pole is 14°, and the angle of elevation to the top of the pole is 18°. Find her distance x from the pole. (Round your answer to one decimal place.)
*Wednesday, September 21, 2011 by Dominic*

**TRIG**

THE SIN COS SEC TAN COT CSC 5X+Y=0
*Tuesday, September 20, 2011 by NAUDIA*

**Calculus**

2sin(2theta) + sqrt(3) = 0 interval (0,2pi) How do I solve this? I thought about maybe subtracting the sqrt(3) from both sides, so that i would have 2sin(2theta) = -sqrt(3) Then maybe dividing by two? sin(2theta) = -sqrt(3)/2 Am I doing anything right here? It's been a ...
*Tuesday, September 20, 2011 by Hannah*

**trig**

Sketch the graph of f(x)=sin(x+30 degrees) and g(x)=cos2x in the same system of axis [-180 degrees;180 degrees]
*Monday, September 19, 2011 by Ntombie*

**trig**

Given the radius of a wheel is 12inches and the angular speed is measured to be 3pie/4 radiant per second, find the linear speed of the piece of gum stuck to the where. Give both an exact answer. And a decimal answer rounded to 4 decimal places.
*Saturday, September 17, 2011 by ALISON*

**trig**

An automobile windshield washer 10inches long rotates an angle of 60degrres. If the rubber part of the blade only covers the last 9inches of the wiped, find the area of the windshield cleaned by the wiper.
*Saturday, September 17, 2011 by ALISON*

**trig**

A space shuttle 200 miles above the earth is orbiting the. Earth once every 6 hours. how far does the shuttle travel in one hour? Note the radius of earth about 4000 miles.
*Saturday, September 17, 2011 by Ali*

**Trig**

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!
*Friday, September 16, 2011 by Wendy*

**Trigonometry**

Solve. 2sin(2ƒÆ) + ã3 = 0 interval [0, 2ƒÎ) How do I start this? I feel like maybe Trig Identities, but I'm not really sure.
*Friday, September 16, 2011 by Josh*

**Trig**

how do i find the exact value of s [pie/2, pie] sin s = radical2/ whole number 2 what is s in radians? how do i figure this out without the use of a calculator. I drew the graph and located it in the second quadrant and i think the triangle is a 45-45-90 but i don't how to...
*Thursday, September 15, 2011 by ALISON*

**Math trig.**

find the length of the arc intercepted by a central angle of 35 degree 28' in a circle of radius 15ft....i cant figure out how to get it ??
*Thursday, September 15, 2011 by josh*

**trig**

find the 5 trig ratios when sin theta = -5/13 and lies in quadrant 3
*Wednesday, September 14, 2011 by karen*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 by Piwokazi*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 by Piwokazi*

**Pre-Calc/Trig**

Please check the first and help with the second-thank you Find all possible rational roots of f(x) = 2x^4 - 5x^3 + 8x^2 + 4x+7 1.I took the constant which is 7 and the leading coefficient which is 2 and factored them 7 factored would be 7,2 2 factored would be 2,1 used 7 as ...
*Monday, September 12, 2011 by Jaclyn*

**TRIG**

A 5.5 ft tall woman casts a 6.2 ft shadow. Find the angle of elevation of the sun.
*Sunday, September 11, 2011 by Samantha*

**trig**

how do you factor completely.. 18x^2+3x-3?
*Sunday, September 11, 2011 by Beth*

**trig**

What's the general solution for 3sin^2x+sinxcosx=2
*Saturday, September 10, 2011 by Piwokazi*

**trig**

2x+5y+3=0 what is the value of sin theta
*Saturday, September 10, 2011 by Anonymous*

**trig**

whats the horizontal distance traveled by a model rocket launched with an intitial speed of 120 feet per second when the rocket is launched at an angle of 60 degrees
*Friday, September 9, 2011 by hanna tret*

**trig**

tan ø = 5; Quad I How do I find the other 5 function values?
*Friday, September 9, 2011 by Michelle*

**trig**

find the exact values of the six trig functions of the angle. -750 sin(-750)= cos(-750)= tan(-750)= csc(-750)= sec(-750)= cot(-750)= I've tried this question over and over again and i cannot get it right. i believe -750 is in the fourth quadrant but I'm not sure. can ...
*Tuesday, September 6, 2011 by ALISON*

**trig**

find a value of interval in degrees cotalpha=1.3692847 alpha=0.023903 is that correct?
*Tuesday, September 6, 2011 by ALISON*

**Trig**

Using tables or a calculator, find tan 16 degrees 15 + cot 32.7 degrees to the nearest hundreths
*Tuesday, September 6, 2011 by Alyson*

**trig**

find the value of alpha cotalpha=1.3692847 is 0.023903 correct?
*Tuesday, September 6, 2011 by ALISON*

**trig**

find reference angle 111degrees and -105 does it equal =75? i don't know the first one
*Tuesday, September 6, 2011 by ALISON*

**trig**

suppose theta is in the interval (90,180 degrees) find the sign of csc(-theta) is it positive or negative = positive???
*Tuesday, September 6, 2011 by ALISON*

**trig**

use a calculator to find the decimal approx. (roud 8decimal places) : sec28°6' does it equal 1.13362379 or 87.99624264 ???
*Tuesday, September 6, 2011 by ALISON*

**trig**

a tree casts a shadow 36 ft long. at the same timem the shadow cast by a vertical 7 ft pole is 4ft long. find the hight of the tree
*Tuesday, September 6, 2011 by hails*

**trig**

a tree casts a shadow 36 ft long. at the same timem the shadow cast by a vertical 7 ft pole is 4ft long. find the hight of the tree
*Tuesday, September 6, 2011 by hails*

**Pre-Calc/Trig**

Please help-I'm stuck really bad What are the roots of the equation x^2 - 4x + 3 = 0 I think I was suppose to use b^2 - 4ac so it would be -4 - (-4)*1*3 = 12 so the roots would be 12 and -12 Thank you for any help you can provide
*Tuesday, September 6, 2011 by Sheila*

**trig**

log(x-15)-2=-logx
*Tuesday, September 6, 2011 by Sara*

**trig**

log4+log(x-7)=2
*Tuesday, September 6, 2011 by Sara*

**trig**

the length of the base of an isosceles triangle is 30.42 inches. each base is 26.54 degrees. find the length of the two equal sides of the triangle to the nearest hundredths. i get 15.19. is that right?
*Tuesday, September 6, 2011 by ALISON*

**trig**

find all values of theta in the interval (0,360) that have the given value: sintheta= √2 ______ 2
*Tuesday, September 6, 2011 by ALISON*

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to get the answer.
*Monday, September 5, 2011 by Charles*

**Pre-Calculus/Trig Check please and help**

Could someone please check the first one and help me with the second one. I'm stuck-Thank you 1.What are theroots of the following polynomial equation? (x+2i)(x-5)(x-2i)(x+8) = 0 I think the roots are -2i,5,2i,-8-you take out the roots as opposites of what are in the ...
*Monday, September 5, 2011 by Tabitha*

**Trig**

Use linear velocity to find out how many miles per hour Jethro's truck is going. In 15 seconds, Jethro's truck's 24-inch diameter tires rotated 101 times.
*Sunday, September 4, 2011 by Summer*

**trig**

cos(arccsc(-20)) Im not allowed to have a decimal answer
*Sunday, September 4, 2011 by max*

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) Sec^-1(-sqrt2) Tan^-1(-sqrt3) Tan^-1(sqrt3)
*Saturday, September 3, 2011 by Anonymous*

**trig**

Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function. Sec^-1(-2) sec^-1(-sqrt2) Cos^-1((-sqrt3)/2) Tan^-1(-sqrt3) Could someone explain how to get the answer as well please.
*Saturday, September 3, 2011 by Anonymous*

**trig**

If sin T = 1/2, then the value of sinT ( sinT - cosecT ) is
*Saturday, September 3, 2011 by alex*

**trig**

how would i graph 3sec(x + (pi/2))
*Friday, September 2, 2011 by max*

**Trig**

Find the exact value of each of the following using reference angles. a)sin 225degrees b) cot 120degrees
*Friday, September 2, 2011 by Ryland*

**trig**

Derive the identity 1 + cot ^2 theta = csc^2 theta by dividing x^2 + y^2 = r^2 by y^2
*Thursday, September 1, 2011 by Anonymous*

**trig**

if cos(theta) equal -3/4 find sin(2theta)
*Thursday, September 1, 2011 by Anonymous*

**Trig**

find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?
*Thursday, September 1, 2011 by ALISON*

**trig**

a propeller turns at 300 rpm. Find the angular speed in rad/sec and the linear speed at the tip if the tip to the center is 30cm
*Thursday, September 1, 2011 by b*

**Trig**

assume A= alpha using complementary rule how do I solve for alpha? cos(2A+40) =sin(3A-60) I don't understand how to start the question. What are the steps in solving for alpha. Do i get cos to equal sin somehow?
*Thursday, September 1, 2011 by ALISON*

**trig**

find the next two positive and negative angles coterminal with the quadrantal angle. 90 degrees. would the answer be..... would it be 450, 810?????? and -630, -270 ????
*Monday, August 29, 2011 by Alison*

**Trig**

cos270degrees -5cos180degrees (0/1)-5(-1/1) 0-5(-1) does it equal -5 or +5?
*Monday, August 29, 2011 by Alison*

**Trig**

Find the angle of the measure formed by the clock. 2:15
*Monday, August 29, 2011 by Davis*

**Trig**

A soccer goal is 24 feet wide. Point A is 40 feet in front of the center of the goal. Point B is 40 feet in front of the right goal post. Which angle is larger A or B? How much larger?
*Sunday, August 28, 2011 by Brett*

**trig**

5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?
*Sunday, August 28, 2011 by Davis*

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)
*Sunday, August 28, 2011 by Davis*

**trig**

Use the appropriate identity to find tan(theta) given that cot theta =0.05.
*Friday, August 26, 2011 by Davis*

**trig**

Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.
*Friday, August 26, 2011 by Davis*

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)
*Friday, August 26, 2011 by Davis*

**trig**

If a, b are the solutions of the equation log base 3 (5-2x)+ log base 3 (5+2x)=2 find the value of the product ab.
*Friday, August 26, 2011 by pat*

**trig**

find the value of x when: x= 5 log base 2 (1/16)+ 8 log base 3 (27)
*Friday, August 26, 2011 by pat*

**trig**

use trig identities to rewrite: (1/(1-cos4v))-(1/(1+cos4v))
*Friday, August 26, 2011 by liz*

**calculus**

Find two unit vectors that make an angle of 60° with v = ‹3, 4›. Give your answers correct to three decimal places. I'm not sure what to do here; I believe that I use to definition of a dot product (or maybe cross product) with relation to the trig function (...
*Wednesday, August 24, 2011 by angles*

**trig**

what is the reference angle for 17 pi/12?
*Tuesday, August 23, 2011 by Brandon*

**Trig**

Find values of all six trig functions if sin(theta)= 4/5 and theta is in the second quadrant.
*Tuesday, August 23, 2011 by Lucy*

**trig**

cos@-4SIN@=1 then sin@+4cos@=
*Sunday, August 21, 2011 by bhavya*

**trig**

If 2tanA+cot A=tan B, then prove that 2tan(B-A)=cot A
*Sunday, August 21, 2011 by santosh*

**trig**

A ferris wheel with a diameter of 100 feet rotates at a constant rate of 4 revolutions per minute. Let the center of the ferris wheel be at the origin. 1. Each of the ferris wheel's cars travels around a cirlce. a) Write an equation of the circle where x and y are measured...
*Saturday, August 20, 2011 by Chris*

**trig**

(sec theta + cosec theta) (sin theta +cos theta) = 2 + sec theta cosec theta
*Saturday, August 20, 2011 by Jancy*

**trig**

a plane is flying with airspeed of 140 mph and heading 280 degrees. The wind currents are running at 20mph at 260 degrees clockwise from due north. Find the true course and ground speed of the plane.
*Friday, August 19, 2011 by Frankie*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 by parminder*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 by Anonymous*

**trig**

how do you find all the values of theta from 0 degrees through 360 degrees for which sin theta equals 0
*Thursday, August 18, 2011 by jen*

**trig**

i can not figure out how to write the complex number in rectangular form the question is 4(cos 5Pie/6 + i sin 5 pie/6)
*Wednesday, August 17, 2011 by fred*

**Trig**

Find the polar coordinates of (8, –8) for r ≥ 0. I am getting 8 square root of 2 as the first coordinate. I am not sure if I am finding the arctan correctly.
*Monday, August 15, 2011 by Dara*

**trig and cotagent**

Evaluate cot(11pi/6) to the nearest hundredth (given in radians).
*Monday, August 15, 2011 by saad*

**trig**

Solve the equation for cos theta-tan theta=0 for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi, if possible form the following choices: pi , 5pi A. --- ---- 4___ 4 B. pi 3pi 5pi 7pi ----- '----- '-----'----- 4_____ 4_____ ...
*Monday, August 15, 2011 by saad*

**trig**

Solve the equation for cos(3theta/2).tan(3theta/2)for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi.
*Monday, August 15, 2011 by saad*