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September 20, 2014

September 20, 2014

**Recent Homework Questions About Trigonometry**

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**trig**

Find a cofunction with the same value as sin 19 degrees
*Tuesday, September 27, 2011 at 5:55pm*

**trig**

Find all values of x in the interval [0, 2π] that satisfy the equation. 6 sin2(x) = 3
*Tuesday, September 27, 2011 at 5:13pm*

**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 at 2:56pm*

**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 at 2:56pm*

**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 at 12:21pm*

**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 at 9:07am*

**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 at 10:44pm*

**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 at 6:23pm*

**Trig**

Given sin theta = -3/5 and 0 is in quad 2, find Cos theta and tan theta
*Wednesday, September 21, 2011 at 10:19pm*

**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 at 10:18pm*

**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 at 3:13am*

**TRIG**

THE SIN COS SEC TAN COT CSC 5X+Y=0
*Tuesday, September 20, 2011 at 6:19pm*

**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 at 11:47am*

**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 at 12:02pm*

**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 at 10:45pm*

**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 at 10:42pm*

**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 at 9:19pm*

**Trig**

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!
*Friday, September 16, 2011 at 4:44pm*

**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 at 12:26pm*

**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 at 10:27pm*

**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 at 2:47pm*

**trig**

find the 5 trig ratios when sin theta = -5/13 and lies in quadrant 3
*Wednesday, September 14, 2011 at 10:38pm*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 at 4:08pm*

**trig**

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
*Monday, September 12, 2011 at 4:07pm*

**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 at 10:53am*

**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 at 7:23pm*

**trig**

how do you factor completely.. 18x^2+3x-3?
*Sunday, September 11, 2011 at 6:52pm*

**trig**

What's the general solution for 3sin^2x+sinxcosx=2
*Saturday, September 10, 2011 at 4:56pm*

**trig**

2x+5y+3=0 what is the value of sin theta
*Saturday, September 10, 2011 at 10:27am*

**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 at 11:31am*

**trig**

tan ø = 5; Quad I How do I find the other 5 function values?
*Friday, September 9, 2011 at 7:09am*

**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 at 11:54pm*

**trig**

find a value of interval in degrees cotalpha=1.3692847 alpha=0.023903 is that correct?
*Tuesday, September 6, 2011 at 9:20pm*

**Trig**

Using tables or a calculator, find tan 16 degrees 15 + cot 32.7 degrees to the nearest hundreths
*Tuesday, September 6, 2011 at 9:04pm*

**trig**

find the value of alpha cotalpha=1.3692847 is 0.023903 correct?
*Tuesday, September 6, 2011 at 8:57pm*

**trig**

find reference angle 111degrees and -105 does it equal =75? i don't know the first one
*Tuesday, September 6, 2011 at 8:28pm*

**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 at 8:25pm*

**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 at 8:12pm*

**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 at 6:47pm*

**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 at 6:41pm*

**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 at 5:05pm*

**trig**

log(x-15)-2=-logx
*Tuesday, September 6, 2011 at 12:19pm*

**trig**

log4+log(x-7)=2
*Tuesday, September 6, 2011 at 11:57am*

**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 at 3:59am*

**trig**

find all values of theta in the interval (0,360) that have the given value: sintheta= √2 ______ 2
*Tuesday, September 6, 2011 at 3:54am*

**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 at 7:27pm*

**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 at 8:52am*

**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 at 7:03pm*

**trig**

cos(arccsc(-20)) Im not allowed to have a decimal answer
*Sunday, September 4, 2011 at 9:57am*

**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 at 4:46pm*

**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 at 3:57pm*

**trig**

If sin T = 1/2, then the value of sinT ( sinT - cosecT ) is
*Saturday, September 3, 2011 at 8:26am*

**trig**

how would i graph 3sec(x + (pi/2))
*Friday, September 2, 2011 at 10:21pm*

**Trig**

Find the exact value of each of the following using reference angles. a)sin 225degrees b) cot 120degrees
*Friday, September 2, 2011 at 8:43pm*

**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 at 10:27pm*

**trig**

if cos(theta) equal -3/4 find sin(2theta)
*Thursday, September 1, 2011 at 9:29pm*

**Trig**

find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?
*Thursday, September 1, 2011 at 9:16pm*

**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 at 12:35pm*

**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 at 2:11am*

**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 at 2:48am*

**Trig**

cos270degrees -5cos180degrees (0/1)-5(-1/1) 0-5(-1) does it equal -5 or +5?
*Monday, August 29, 2011 at 2:29am*

**Trig**

Find the angle of the measure formed by the clock. 2:15
*Monday, August 29, 2011 at 1:21am*

**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 at 2:39pm*

**trig**

5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?
*Sunday, August 28, 2011 at 6:43am*

**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 at 5:47am*

**trig**

Use the appropriate identity to find tan(theta) given that cot theta =0.05.
*Friday, August 26, 2011 at 11:15pm*

**trig**

Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.
*Friday, August 26, 2011 at 7:45pm*

**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 at 7:43pm*

**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 at 3:29pm*

**trig**

find the value of x when: x= 5 log base 2 (1/16)+ 8 log base 3 (27)
*Friday, August 26, 2011 at 3:15pm*

**trig**

use trig identities to rewrite: (1/(1-cos4v))-(1/(1+cos4v))
*Friday, August 26, 2011 at 12:31am*

**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 at 10:45am*

**trig**

what is the reference angle for 17 pi/12?
*Tuesday, August 23, 2011 at 11:22pm*

**Trig**

Find values of all six trig functions if sin(theta)= 4/5 and theta is in the second quadrant.
*Tuesday, August 23, 2011 at 2:47pm*

**trig**

cos@-4SIN@=1 then sin@+4cos@=
*Sunday, August 21, 2011 at 11:25am*

**trig**

If 2tanA+cot A=tan B, then prove that 2tan(B-A)=cot A
*Sunday, August 21, 2011 at 1:08am*

**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 at 4:21pm*

**trig**

(sec theta + cosec theta) (sin theta +cos theta) = 2 + sec theta cosec theta
*Saturday, August 20, 2011 at 4:32am*

**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 at 1:13pm*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 at 12:33pm*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 at 12:30pm*

**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 at 9:37pm*

**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 at 9:57pm*

**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 at 10:52pm*

**trig and cotagent**

Evaluate cot(11pi/6) to the nearest hundredth (given in radians).
*Monday, August 15, 2011 at 12:38am*

**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 at 12:32am*

**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 at 12:29am*

**trig**

sin2xcosx-sinx=0 interval(0,2pi)
*Sunday, August 14, 2011 at 3:07pm*

**trig**

Find the smallest positive value of x(in degree) for which tan(x+100°)=tan(x+50°)*tanx*tan(x-50°)
*Saturday, August 13, 2011 at 11:38am*

**trig**

A tower is supported by a guy wire from the top of the tower to the ground 16 ft from its base. The wire makes an angle of 62 with the ground. The length of the wire is a. 30.09 ft b. 18.12 ft c. 28.41 ft d. 34.08 ft
*Friday, August 12, 2011 at 1:54pm*

**Trig/pre-calc**

r=8cos(theta)+5sin(theta), convert the polar equation into a rectangular equation and then complete the square and determine the center radius...? Help?! I missed the section, and am not getting anywhere with the text...
*Friday, August 12, 2011 at 7:21am*

**trig**

Find sin(2theta) if tan of theta = 7/24, pi < theta < 3pi/2 ?
*Tuesday, August 9, 2011 at 11:03pm*

**trig**

If z=1+i, then the multiplicative inverse of z esqaire is:
*Monday, August 8, 2011 at 5:18am*

**trig**

Find sec theta if theta=3/4 in Q1
*Sunday, August 7, 2011 at 11:23pm*

**Pre-calculus**

find the trig functions of angle x if the terminal side of x passes through the point (-12, 5).
*Sunday, August 7, 2011 at 10:35pm*

**Precalculus**

How would you solve this trig function: cos2x=sin^2-2 how do you know what trig identities to use?
*Saturday, August 6, 2011 at 5:39pm*

**Geometry**

30-60-90 triangle has a hypoteneuse of 10 use trig to find the short side
*Wednesday, August 3, 2011 at 9:58am*

**Math**

What are some examples of exponential function (Using the formula: Al = A0(1/2)^t/h ), trig functions that are used to find amplitude, period, max, min etc., and combinations of transformation at home or in life in general?
*Saturday, July 30, 2011 at 7:45pm*

**trig**

An arc subtends an angle 15 degrees at the centre of the circle. If the radius is 4 centimetres, find the area of the sector?
*Friday, July 29, 2011 at 10:18pm*

**Trig**

A car is traveling at a speed of 55 mph with a bearing of 210°. What vector represents the velocity?
*Thursday, July 28, 2011 at 10:24pm*

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