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February 6, 2016

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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

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Homework Help: Math