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September 23, 2014

September 23, 2014

**Recent Homework Questions About Trigonometry**

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**trigonometry**

simplify sin7x-sin3x as a product of trig functions.
*Tuesday, April 19, 2011 at 8:16pm*

**trig**

convert the point with polar coordinates (2,7pi/6) into rectangular coordinates.
*Tuesday, April 19, 2011 at 8:13pm*

**trig**

The parametric equations for a curve in the x-y plane are x=2+t^2 and y=4-3t. Determine the points where the curve intersects the x-axis.
*Tuesday, April 19, 2011 at 8:12pm*

**trig**

simplify the expression: sin(theta+pi/4) + sin(theta-pi/4)
*Tuesday, April 19, 2011 at 8:08pm*

**trig**

angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)
*Tuesday, April 19, 2011 at 1:33pm*

**trig**

simplify the expression sin(theta+pi/4) + sin(theta-pi/4)
*Monday, April 18, 2011 at 10:15pm*

**Algebra2/ Trig**

During a baseball season, a company pledges a donation to a charity of $5000 plus $100 for every home run hit by the local team. Does it make more sense to represent this situation using a sequence or a series? Explain your reasoning.
*Monday, April 18, 2011 at 2:20pm*

**trig**

what is the cube root of (-64i)?
*Sunday, April 17, 2011 at 5:54pm*

**trig**

What is the trigonometric notation for 3-3(sqrt3i)?
*Sunday, April 17, 2011 at 1:14pm*

**trig**

Multiply: 5(cos Pi/3 + i sin Pi/3)times 2 (cos Pi/4 + i sin Pi/4) and leave the answer in trigonometric notation.
*Sunday, April 17, 2011 at 12:56pm*

**Pre-Calc/Trig**

1. Find all possible values of k so that (3,5), (5,-1), and (k,8) are the vertices of a right triangle 2. Find all points with -x+2y=0 so that (x,y) is 5 units from (-1,4) 3. (f(x+h)-f(x))/h for f(x)= -5/(x+2) 4. The frequency of the sound produced by a string is directly ...
*Sunday, April 17, 2011 at 1:54am*

**trig**

Peter (P) and Jamie(J) have computer factories that are 132 miles apart. They both ship their completed parts to Diane (D). Diane is 72 miles from Peter and 84 miles from Jamie. Using the points D,J,and P to form a triangle, find m<PDJ to the nearest tenth of a degree.
*Saturday, April 16, 2011 at 5:39pm*

**trig**

Graph this trigonometric function. y=-4cos(x/2+3.14)+1
*Friday, April 15, 2011 at 8:47pm*

**trig**

A rocket tracking station has two telescopes A and B placed 1.9 miles apart. The telescopes lock onto a rocket and transmit their anlges of elevation to a computer after a rocket launch. what is the distance to the rocket
*Thursday, April 14, 2011 at 6:13pm*

**trig**

A rocket tracking station has two telescopes A and B placed 1.9 miles apart. The telescopes lock onto a rocket and transmit their anlges of elevation to a computer after a rocket launch. what is the distance to the rocket
*Thursday, April 14, 2011 at 6:08pm*

**trig**

Show that (90-45)=cos90 cos 45
*Thursday, April 14, 2011 at 2:04pm*

**alagbra 2 trig**

solve the equation 2ln(x+5)-1=7
*Wednesday, April 13, 2011 at 5:17pm*

**trig**

2cos(theda)-"2=0
*Sunday, April 10, 2011 at 10:37pm*

**trig**

3sin(2x)-2cos(x)=0
*Sunday, April 10, 2011 at 10:46am*

**trig**

express in terms of ¦Ð, the interval for which 4cosx ¡Ý 2
*Saturday, April 9, 2011 at 7:57pm*

**trig**

4cos(2x)+2cos(x)+3=0
*Saturday, April 9, 2011 at 11:04am*

**trig**

find the period and amplitude of each sine function.then sketch each function from 0 to 2pi: 1)y=-3.5 sin 5theta
*Thursday, April 7, 2011 at 8:22pm*

**trig**

If an equilateral triangle has a side of 10 ft what is its altitude to two significant digits
*Wednesday, April 6, 2011 at 9:35pm*

**trig**

Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?
*Wednesday, April 6, 2011 at 6:49pm*

**Trig**

A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the antenna measure 58 and 44 respectively. How tall is the building
*Tuesday, April 5, 2011 at 6:58pm*

**Pre-calc/Trig**

If cot(a)=3 and sin(b)= (15/17) where a being alpha lies in quadrant 3 and b being beta lies in quadrant 2, what is the exact value of sin(2a)
*Tuesday, April 5, 2011 at 4:53pm*

**trig**

2 cosine squared pi over 8 minus 1 find exact value of given expression
*Monday, April 4, 2011 at 8:31pm*

**trig maths**

rewrite 7 sin2A – 5 sin A + cos2A = o to solve for A
*Monday, April 4, 2011 at 7:51am*

**trig**

If a triangle has an area of 50 square units and has angles that measure 15, 65, and 100 degress, find the length of the shortest side to the nearest tenth. Do not round till the final answer.
*Sunday, April 3, 2011 at 8:13pm*

**trig**

If a triangle has an area of 50 square units and has angles that measure 15, 65, and 100 degress, find the length of the shortest side to the nearest tenth. Do not round till the final answer.
*Sunday, April 3, 2011 at 8:12pm*

**Trig**

What is the exact value of sin^-1(sin(8pi/15)?
*Wednesday, March 30, 2011 at 9:07pm*

**math please help**

use an inverse trig function to write theta as a function of x (There is a right triangle drawn. The hypotenuse is 2. Theta is the angle between the base and the hypotenuse. The base/adjacent side of theta is labeled(x + 1) The side opposite theta does not have a value.) Use ...
*Wednesday, March 30, 2011 at 8:25pm*

**trig**

secx=5 use a graph to solve the following equation in the interval x is greater than -pie but less than pie
*Wednesday, March 30, 2011 at 7:06pm*

**trig**

I have to retype this. For which angles theta, with 0 degrees less than/equal to theta less than/equal to 180 degrees, is sin 3theta = (equal) -1 (negative 1)? a) 30 and 150 degrees b) 60 and 120 degrees c) 90 degrees d) 0 and 120 degrees How do I set this up?
*Wednesday, March 30, 2011 at 6:16pm*

**trig**

use an inverse trig function to write è as a function of x (There is a right triangle. The hypotenuse is 2. è is the angle between the base and the hypotenuse. The base/adjacent side of è is (x + 1) The side opposite è does not have a value.) a) &...
*Wednesday, March 30, 2011 at 6:12pm*

**Trig**

A Person is riding a bike with wheels that have a 14 inch radius at 15 mph. The bicyclist rides over some gum which sticks in the tire, assume this is t=0. 1. Find a function that gives the height in inches above the ground of the gum, with input is second
*Wednesday, March 30, 2011 at 6:07pm*

**trig**

For which angles ¦È, with 0¡ã ¡Ü ¦È ¡Ü 180¡ã, is sin 3¦È = -1? How do I set this up?
*Wednesday, March 30, 2011 at 5:53pm*

**trig**

solve csc^2x=3 for all possible solutions
*Tuesday, March 29, 2011 at 11:21pm*

**trig**

Use the appropriate cofunction to find an equivalent expression for cos 54° cot 24 sec 32 sin 36 csc 44
*Tuesday, March 29, 2011 at 9:23pm*

**trig**

A passenger airplane flying at an altitude of 1.8 km starts its final airport approach by descending at an angle of depression of 6°. How far along the ground is the airplane from its landing point
*Tuesday, March 29, 2011 at 9:20pm*

**trig**

Given a right triangle with legs 8 and 5, find the measure of the two acute angles. (Round to the nearest hundredth
*Tuesday, March 29, 2011 at 9:19pm*

**Pre Calc Trig**

Verify the following: tan( a + p/2) = -cot a a= alpha and p= pie since I do not have that button.
*Tuesday, March 29, 2011 at 1:16pm*

**trig**

y=1/4 cos (2/3 x +3 pi )
*Monday, March 28, 2011 at 9:02pm*

**trig**

In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of teh sector to the nearest hundredth of a square inch.
*Monday, March 28, 2011 at 2:23pm*

**trig**

y = 3sec3x Amplitude =_________ Period = __________ Shift along x = ____________ Shift along y = _____________ Kind of reflection = ______________
*Saturday, March 26, 2011 at 9:22pm*

**trig**

ABC is an isoscele triangle in which [AB]=[AC]=5cm and [BC]=6cm. Calculate [AM], where M is the mid-point of BC.
*Saturday, March 26, 2011 at 7:22pm*

**Trigonometry**

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your answer. True or False: For ...
*Thursday, March 24, 2011 at 3:03pm*

**Trigonometry**

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your answer. True or False: For ...
*Thursday, March 24, 2011 at 2:46pm*

**Trig**

Solve: (2/y+2)+(3/y)=(-y/y+2)
*Tuesday, March 22, 2011 at 11:51pm*

**Trig**

(2/y+2)+(3/y)=(-y/y+2)
*Tuesday, March 22, 2011 at 10:15pm*

**trig**

Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)
*Tuesday, March 22, 2011 at 7:30pm*

**trig**

Prove that sin squared 20 degrees+sin squared 40 degrees+ sin squared 80 degrees is equal to 3/2
*Tuesday, March 22, 2011 at 3:18pm*

**trig**

Rewrite as a function of a quadrant 1 angle. cos152
*Tuesday, March 22, 2011 at 9:42am*

**trig, Phoenix College**

Where did the number 0.5736 come from or originated from? Will the horizon be closer or farther away when your eyes are closer to the surface? Will the horizon be closer or farther away when your eyes are farther from the surface?
*Monday, March 21, 2011 at 10:59pm*

**math - trig**

Given the coordinates of the terminal side of an angle in standard position, find the value of sine, cosine, and tangent: (-4,0)
*Monday, March 21, 2011 at 10:10pm*

**verfying trig identity**

1+Cosx 1-Cosx _______ - _______ = 4CotxCscx 1-cosx 1+Cosx
*Monday, March 21, 2011 at 7:01pm*

**trig**

determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a
*Sunday, March 20, 2011 at 11:46am*

**trig**

if sina,cosa,tana are in geometric progression then prove that cot^6a-cot^2a=1
*Sunday, March 20, 2011 at 11:40am*

**trig**

For each expression in column I, choose the expression from column II to complete an identity: Column I Column II 1. -tanxcosx A. sin^2x/cos^2x 2. sec^2x-1 B. 1/sec^2x 3. sec x/cscx C. sin(-x) 4. 1+sin^2x D.csc^2x-cot^2x+sin^2x 5. cos^2 x E. tanx I figured #1 is C, #2 is A, ...
*Saturday, March 19, 2011 at 9:52pm*

**trig**

draw the graph of 4sin(x+30) and 2+tanx for values of x from 0 degree to 360degree and obtain the solution within the range of the equation 4sin(x+30)-tan x=2
*Saturday, March 19, 2011 at 5:38pm*

**trig**

{Given: cos(A)=\frac: sqrt{203}/{18} {Find: tan(A) Find the positive value of the above in simplest radical form.
*Saturday, March 19, 2011 at 2:54pm*

**trig**

The number of a fraction is three more than twice the denominator. The fraction simplified is equal to 9/4 Find the fraction
*Wednesday, March 16, 2011 at 10:37pm*

**trig**

Bob throws a ball straight up with an initial speed of 50 feet per second from a height of 6 feet. (a) Find parametric equations that describe the motion of the ball as a function of time. (Do this on paper. Your instructor may ask you to turn in this work.) (b) How long is ...
*Tuesday, March 15, 2011 at 9:02pm*

**trig**

1/4tan(2x)
*Tuesday, March 15, 2011 at 5:18pm*

**Math Trig**

Find all solutions on the interval [0,2pi] for the following: 2sin^2(x)-5sin(x)=-3 cos^2(x)+sin(x)=1
*Monday, March 14, 2011 at 7:00pm*

**Trig**

Finding all Solutions for 2cos(x)-ã3=0
*Monday, March 14, 2011 at 6:38pm*

**Trig**

sin^2x/sec^2x-1
*Monday, March 14, 2011 at 6:37pm*

**Trig**

Find all values of theta in the interval 0 <= theta < 360 that satisfy the equation 3cos(2theta)=7cos(theta). Express answers to the nearest ten minutes.
*Monday, March 14, 2011 at 6:30pm*

**trig**

prove that (sin^4x-cos^4x)/(sinx-cosx) = sinx+cosx
*Saturday, March 12, 2011 at 9:00am*

**Trig **

If the terminal side of theta in standard position contains the point (5,8). Find the exact value of tan of theta
*Thursday, March 10, 2011 at 8:36pm*

**Trig **

Given that theta is a quadrant 3 angle with cos of theta=-7radical65/65, determine tan of theta
*Thursday, March 10, 2011 at 8:21pm*

**trig **

if cot of theta is less than zero, and csc of theta is less than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:06pm*

**trig**

if sin of theta is less than zero and cos of theta is greater than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:06pm*

**trig**

if csc of theta is greater than zero and sec of theta is less than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:05pm*

**trig**

if than of theta is greater than zero and cos of theta is greater than zero what quadrant is theta in?
*Thursday, March 10, 2011 at 8:03pm*

**Algebra and Trig**

Aldo has feet of fencing. He will use it to form three sides of a rectangular garden. The fourth side will be along a house and will not need fencing. What is the maximum area that the garden can have?
*Thursday, March 10, 2011 at 1:16pm*

**trig**

solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)
*Wednesday, March 9, 2011 at 9:04pm*

**Math (Trig.)**

A boat sailing from A to B travels in a straight line until the captain realizes he is off course. The boat is turned through an angle of 60 degrees, then travels another 10 km to B. The trip would have been 4 km shorter if the boat had gone straight from A to B. How far did ...
*Wednesday, March 9, 2011 at 7:47pm*

**Trigonometry**

I have some trigonometric equations to do, but I'm pretty lost, and I have to get them done in a timely fashion, so any help would be much appreciated. "Solve the following trig equations. Give all the positive values of the angle between 0 degrees and 360 degrees ...
*Wednesday, March 9, 2011 at 3:38pm*

**trig**

I need to state the period and 2 consecutive asymptotes on the graph for the following questions. 1: y = -3 tan pi*x period: pi (?) asymptotes: ? 2: y = 2 sec 4x period: ? asymptotes: ? 3: y = csc (x/3) period: ? asymptotes: ? 4: y = 3 cot (pi*x/2) period: ? asymptotes: ? If ...
*Wednesday, March 9, 2011 at 9:28am*

**trig**

A surveillance satellite circles the earth at a hight of h miles above the surface. Suppose that d is the distance, in miles, on the surface of the earth that can be observed from the satellite. find an equation that relates to central angel (theta) to the hight h.
*Tuesday, March 8, 2011 at 11:23am*

**Trig**

What is the phase shift of y=6cos(6x+pi/2)?
*Monday, March 7, 2011 at 11:24am*

**trig**

tanx sin^2x capital sigma [0,2p]
*Sunday, March 6, 2011 at 10:34pm*

**trig**

give and exact value for cos(2pi/3)
*Sunday, March 6, 2011 at 9:41pm*

** Trig**

If = 58° and m = 120 in, what is the value of n to the nearest tenth of an inch?
*Sunday, March 6, 2011 at 9:30pm*

**trig**

with its arm fully extended to a length of 16ft, the maximum height that a man lift can reach is 18ft. The lowest height is 4ft, what is the position where the arm of the lift is horizontal. a) if a man gets on the lift and the arm is lifted through an angle 15degrees,what ...
*Sunday, March 6, 2011 at 5:49pm*

**trig**

if theta is an angle in standard position and B(-3,4) is a point on the terminal side of the angle, what is the value of sin theta?
*Sunday, March 6, 2011 at 12:13pm*

**trig**

Suppose the tangent of an acute angle in a right triangle is less than 1. How does the side opposite the angle compare to the side adjacent to the angle?
*Saturday, March 5, 2011 at 6:07pm*

**trig**

using the given point (9, squareroot 19) find the value of cosx
*Friday, March 4, 2011 at 11:39am*

**Trigonometry**

Solve the following trig equations. Give all positive values of the angle between 0 degrees and 360 degrees that will satisfy each. Give any approximate value to the nearest minute only. 3 sin è - 4 cos è = 2 Can you please help me with this one.
*Thursday, March 3, 2011 at 11:14pm*

**Geometry/trig**

How do I find the geometric mean between 12 and 2.4?
*Thursday, March 3, 2011 at 10:56pm*

**Trigonometry**

use the appropriate trig identity (sum and difference, half angle, double angle) to find the exact value. 1)cos 255 degrees 2) sin 165 degrees 3) tan 285 degrees
*Thursday, March 3, 2011 at 7:55pm*

**trigonometry (please double check this)**

Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. a.) ( I got confused doing this 1 can you help me with it.) 3 sin theta - 4 cos theta...
*Thursday, March 3, 2011 at 5:34pm*

**trigonometry (please double check this)**

Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. 1. sin2ƒÆ = (sqrt 3)/2 2. sin^2ƒÆ = cos^2ƒÆ + 1/2 3. ...
*Thursday, March 3, 2011 at 6:32am*

**trig**

Richard is flying a kite. The kite string makes an angle of 57 degrees with the ground. If Richard is standing 100 feet from the point on the ground directly below the kite , find the length of the kite string
*Wednesday, March 2, 2011 at 11:16pm*

**trig**

y=sin pie divied by 2 theta
*Wednesday, March 2, 2011 at 10:38pm*

**trig**

covert polar equation r = 6/(2-3sinè) to rectangular equation
*Wednesday, March 2, 2011 at 3:53am*

**Trig**

Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation
*Tuesday, March 1, 2011 at 5:23pm*

**algebra/trig**

solve: ln12x = 6
*Tuesday, March 1, 2011 at 3:03pm*

**trig**

if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.
*Sunday, February 27, 2011 at 5:19pm*

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