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October 22, 2014

October 22, 2014

**Recent Homework Questions About Trigonometry**

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**trig**

what is the correct answer in proving trigonometric identities if tan theta/sin theta = sec theta
*Thursday, February 2, 2012 at 7:10am*

**trig**

what is the correct answer in proving trigonometric identities if tan theta cos^2 theta + cos^2 theta
*Thursday, February 2, 2012 at 7:06am*

**Trig**

Its a 30-60-90 triangle there's a line in the center that= 10 a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC?
*Wednesday, February 1, 2012 at 11:12pm*

**Trig**

angle b=25 degrees, angle c=90 AB= 25 a. Find the length of side b to two decimal places. b. Find the length of side a to two decimal places in three different ways.
*Wednesday, February 1, 2012 at 11:00pm*

**Trig **

Sarah used her calculator to find sin125 degrees . She wrote down sin125 degrees = -.57. How could Sarah recognize that her answer is incorrect?
*Wednesday, February 1, 2012 at 10:56pm*

**trig**

a grocery store display consists of cases of soda. there are 15 cases at the base, and 1 case at the top. if there are 15 rows, how many cases are needed for the entire display? a) 180 b)30 c)130 d)15
*Wednesday, February 1, 2012 at 9:27pm*

**trig**

What is the length of the circular arc intercepted by a central angle of 20degrees in a circle with a radius of 5cm?
*Wednesday, February 1, 2012 at 9:16pm*

**trig**

What does sin(squared)t + cot(squared)tsin(squared)t equal? and can someone explain it?
*Wednesday, February 1, 2012 at 9:08pm*

**alg2/trig**

starting salary for a job is $30,000 with a guaranteed raise of $5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. please somone help!
*Wednesday, February 1, 2012 at 9:05pm*

**trig**

The angle of elevation to the top of a very tall Building is found to be 15° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building
*Wednesday, February 1, 2012 at 5:00pm*

**Math-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. The height h (in feet) of a Ferris wheel car located at the point (x, y) is given by h = 50 + y where y is related to the ...
*Wednesday, February 1, 2012 at 1:00pm*

**trig**

4 costheta +3sintheta=5,4sintheta-3costheta=WHAT
*Wednesday, February 1, 2012 at 8:09am*

**trig**

in proving trigonometric identities if sec theta - tan theta sin theta is equal to cos theta. what is the correct answer?
*Wednesday, February 1, 2012 at 7:28am*

**trig**

in proving trigonometric identities if 1 + sin^2 theta is equal to 2 sin^2 theta + cos^2 theta. what is the correct answer?
*Wednesday, February 1, 2012 at 7:25am*

**trig**

in proving trigonometric identities if cot theta sin theta = cos theta. what is the correct answer?
*Wednesday, February 1, 2012 at 7:18am*

**trig**

starting salary for a job is 30,000 with a guaranteed raise of $5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. how much money would you earn in the fifth year?
*Tuesday, January 31, 2012 at 10:56pm*

**trig**

How can I find the exact value of 4cos(7ð/4)-2sin(ð/3)?
*Tuesday, January 31, 2012 at 10:05pm*

**trig**

how can we find the value of sin -720
*Tuesday, January 31, 2012 at 9:06pm*

**alg2\trig**

a colony of 300 bacteria doubles each day. write an explicit formula to determine how many bacteria there would be on the nth day. how would you do this?
*Tuesday, January 31, 2012 at 8:09pm*

**trig**

The terminal side of θ lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of θ by finding a point on the line. Line: (55/48)x Quadrant:III sin(θ)= cos(θ)= tan(θ)= csc(θ)= sec(θ)= cot(θ)=
*Tuesday, January 31, 2012 at 7:06pm*

**trig and algerba**

6+7(t - 1) = 5(t + 7) + 8 what does t equal
*Tuesday, January 31, 2012 at 5:18pm*

**trig**

If A=55 degrees 55 minutes and c=16, find a.
*Tuesday, January 31, 2012 at 3:06pm*

**trig**

Prove (1+secx)/(tanx+sinx)=cscx
*Tuesday, January 31, 2012 at 1:38pm*

**trig**

Find the indicated trigonometric function, given that è is an angle in standard position with the terminal side passing through the given point. 2) (15, 20); Find csc è. A) 5/3 B) 3/4 C) 5/4 D) 4/3
*Tuesday, January 31, 2012 at 12:07pm*

**Trig**

Solve the following trig equation 2cos(x-π/6)=1
*Tuesday, January 31, 2012 at 2:51am*

**Trig**

Prove (1+secx)/(tanx+sinx)=cscx
*Tuesday, January 31, 2012 at 2:28am*

**Trig**

Solve 5^2x -4(5^x)=12
*Monday, January 30, 2012 at 7:45pm*

**Trig**

Solve Log[8](log[5]x)=0
*Monday, January 30, 2012 at 6:52pm*

**Trig **

Write the following in terms of sin(θ) and cos(θ); then simplify if possible. csc(θ) - cot(θ)cos(θ) =
*Monday, January 30, 2012 at 1:10pm*

**alg2\trig**

if a3= 17 & a8=37 are terms in annarithmetic sequece, fina a1 & d. the answer is a1=9 & d=4 but i dont understand how they got the answer, please help!
*Sunday, January 29, 2012 at 9:10pm*

**trig**

sin2x=cos3x then sinx=?(if 0<x<pi/2)
*Sunday, January 29, 2012 at 9:31am*

**trig**

Find sec^2 x (4 tan^2 x-3)
*Saturday, January 28, 2012 at 4:16pm*

**Trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point. I have 3 other problems like this and i have no clue how to do them. can someone help please?
*Saturday, January 28, 2012 at 2:00pm*

**trig**

if x is an acute angle and sinx= cosx then find the value of x?
*Saturday, January 28, 2012 at 1:24am*

**Precalculus**

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?
*Friday, January 27, 2012 at 8:21pm*

**trig**

What is cos(11pi/3)? Explain your thinking. What is sin(13pi/4) ? Explain your thinking.
*Friday, January 27, 2012 at 6:39pm*

**trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point
*Friday, January 27, 2012 at 6:37pm*

**trig**

What are the coordinates of the terminal point determined by t=7pi/6 ?
*Friday, January 27, 2012 at 6:35pm*

**Trig**

tan(θ) = a (a ≠ 0), find cot(θ).
*Friday, January 27, 2012 at 6:12pm*

**TRIG **

Find the remaining trigonometric ratios of θ if sin(θ) is given and θ QI sin(θ)=7/sqrt 149 cos= tan= cot= csc= sec=
*Friday, January 27, 2012 at 5:19pm*

**trig**

how to do root3 value
*Friday, January 27, 2012 at 11:00am*

**trig**

Graph f(x)= second(2x+3.14/4)
*Friday, January 27, 2012 at 10:41am*

**trig**

Determine if the value of each trig function is positive, negative, zero, or undefined. a) tan 310 degrees b) cos 7pi/6 c) sin -245 degrees d) sec( -7/2)
*Thursday, January 26, 2012 at 11:14pm*

**trig**

Find the length of the circular arc intercepted by a central angle of 20 degrees in a circle or radius 5cm
*Thursday, January 26, 2012 at 10:46pm*

**trig**

Find the reference angle for each given angle: a) 325 degrees b) 14pi/3 c) -190 degrees
*Thursday, January 26, 2012 at 10:21pm*

**trig**

If point G(a,b) lies on the terminal side of angle theta in standard position, what is the value of sin(theta) if point G also lies on the unit circle?
*Thursday, January 26, 2012 at 10:14pm*

**trig**

If point (3, -8) lies on the terminal side of an angle A in standard position, find: a) sinA b) tanA
*Thursday, January 26, 2012 at 10:09pm*

**trig**

If the point (-3,0) lies on the terminal side of angle theta in standard position find: a) csc theta b) cot theta
*Thursday, January 26, 2012 at 10:08pm*

**trig**

The second hand on a clock is 8 inches long. If the second hand travels a distance of 10pi inches, what is the positive radian measure of the angle that the second hand travels through?
*Thursday, January 26, 2012 at 9:52pm*

**trig**

Are 22pi/5 and 100 degrees coterminal? explain.
*Thursday, January 26, 2012 at 9:47pm*

**trig**

Find the exact value. Without using a calculator a) cos (-17pi/6) b) sec (3pi/2)
*Thursday, January 26, 2012 at 9:46pm*

**trig**

If theta is the measure of an angle in standard position with the given conditions, find the quadrant(s) in which the terminal side of theta lies. a) cot theta < 0 b) cos theta > 0 , csc theta < 0
*Thursday, January 26, 2012 at 9:42pm*

**trig**

Use a ratio identity to find tan(θ) if given the following. sin=6/sq rt 37 and cos 1/sq rt 37
*Thursday, January 26, 2012 at 12:31am*

**trig**

Find the remaining trigonometric ratios of θ if sin(θ) = -1/6 and θ is not in QIII cos tan cot csc sec
*Thursday, January 26, 2012 at 12:29am*

**trig**

Give the reciprocal of the following. 7/15
*Thursday, January 26, 2012 at 12:28am*

**trig**

If sin(θ) = 8/17 and θ terminates in QI, find cos(θ)
*Thursday, January 26, 2012 at 12:28am*

**trig**

find two values of theta, zero degrees is than or equal to theta which is less than 360 degrees, that satisfy the given trigonometric equation. tan theta equals radical 3.
*Wednesday, January 25, 2012 at 11:49pm*

**trig**

Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25
*Wednesday, January 25, 2012 at 10:37pm*

**trig**

a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.
*Wednesday, January 25, 2012 at 2:03pm*

**trig**

What is the fundamental period of the function f(x)=4/9sinx
*Wednesday, January 25, 2012 at 12:31pm*

**trig**

Find the length of side b to the nearest whole number if side a=105,angle A=65 degrees and angle B=37 degrees?
*Wednesday, January 25, 2012 at 12:12pm*

**trig**

how to find out maxima of function 3acos3theta
*Wednesday, January 25, 2012 at 1:55am*

**trig**

not sure how to simplify tan(t+pi)/sin(t+2pi)
*Tuesday, January 24, 2012 at 11:33pm*

**trig**

city A is 300 miles directly north of city B assuming the earth to be sphere of radius 4000 miles determine the difference in latitude in degrees of the two cities
*Tuesday, January 24, 2012 at 9:30pm*

**Trig**

If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?
*Tuesday, January 24, 2012 at 9:08pm*

**trig**

If the line OP of radius and(x,y) is rotated through a certain angle about the oringin
*Tuesday, January 24, 2012 at 1:48pm*

**alg2/trig**

what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.
*Monday, January 23, 2012 at 9:29pm*

**trig**

tan-5n over 3
*Monday, January 23, 2012 at 8:16pm*

**TRIG HELP ASAP**

I need help trying to find the major and minor axis on this problem: x^2+3y^2-6x+24y+6=0
*Monday, January 23, 2012 at 7:41pm*

**trig**

How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?
*Monday, January 23, 2012 at 1:08am*

**Trigonometry**

What are these things called: -cos x = cos -x What are the rules to these trig rules? Thanks
*Sunday, January 22, 2012 at 11:29pm*

**trig**

4cos^2 theta = 3 where 0 degrees < theta< 360
*Sunday, January 22, 2012 at 10:01pm*

**alg2/trig**

1)3x^2-12x-21 solve by completing the square in simplest radical form 2) (1/x+3)-(2/3-x)=(4/x^2-9)find values of x 3)3/radical(3a^2b^4) is equivalent to 4) factor completely 27x^-75x^4
*Sunday, January 22, 2012 at 7:57pm*

**trig**

Please explain to me how to get this -- what quadrant tan theta < 0, sin theta < 0 is in.
*Saturday, January 21, 2012 at 7:06pm*

**Trig**

what quadrant is this in and please explain... sin theta < 0, cos theta > 0
*Saturday, January 21, 2012 at 6:51pm*

**trig**

5pi/7 what quadrant is it in???
*Saturday, January 21, 2012 at 6:07pm*

**Trig**

Find the speed in both radians per second and degrees per second for the hour hand, the minute hand, and the second hand on a clock.
*Saturday, January 21, 2012 at 3:49pm*

**algebra 2 trig**

express the product of (2/3x^2-1/2x) and (12x+4/5) as a trinomial
*Saturday, January 21, 2012 at 2:16pm*

**trig**

How to get 5degree without using calculator using identities?
*Friday, January 20, 2012 at 10:20pm*

**trig**

if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?
*Friday, January 20, 2012 at 10:20am*

**Math**

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand starts in the upright ...
*Thursday, January 19, 2012 at 3:36pm*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx
*Thursday, January 19, 2012 at 8:45am*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx
*Thursday, January 19, 2012 at 8:45am*

**trig**

If theta =( -7pi )/( 3) , then sec(theta) equals...?
*Tuesday, January 17, 2012 at 5:27pm*

**trig**

How do I get exact measures? cosine 270 degrees sin 90 degrees tan 360 degrees csc 45 degrees no calculator!
*Monday, January 16, 2012 at 7:11pm*

**trig**

how do I find this without a calculator? sin 90 degrees?
*Monday, January 16, 2012 at 3:44pm*

**geom/trig**

Using scissors to cut a rectangular piece of paper from one corner ro the opposite corner. The cut is 36 cm long and makes a 34 degree angle to the uncut edge. How many cm long is the paper (from the corner where he started the cut?
*Monday, January 16, 2012 at 2:05pm*

**trig**

I have a couple of these and cannot locate directions I can understand-please help! Draw the graph of y=3cos(2x) for 0< or= x < or = 2 pi
*Monday, January 16, 2012 at 1:20pm*

**Trig**

(x+3)^2/4^2 + (y-2)^2/5^2 The location of the Foci are at: a.(-3,-1) and (-3,-5) b. (-3,2) and (-3,5) c. (-3,-3) and (-3,7) d. (-3,1) and (-3,-5) I get (-3,2) and (-3,5) Am I correct?
*Saturday, January 14, 2012 at 2:08pm*

**trig**

From the top of a hill 700 ft. high, an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two markerstones.
*Saturday, January 14, 2012 at 5:27am*

**Trig-Please check**

What are polar coordinates of (4,6) 1.Round r to nearest hundredth and theta to nearest hundredth of RADIAN My work: r^2 = x^ + y^2 r^2 = 4^2 + 6^2 r^2= 16 +36 r^ =52 r=7.21 I'm stuck on how to do theta in Radians, could you please assist
*Friday, January 13, 2012 at 11:20am*

**trig**

3x^2+16y^2=48 conic sections
*Friday, January 13, 2012 at 2:05am*

**trig**

I need help finding derivatives and antiderivatives. Given: f(x),find f'(x) 1. f(x)-2x^6 2. f(x)= -3x +7 3. f(x)= 3x^2 - 5x 4.f(x)= 1/2x^2 - x + 4
*Thursday, January 12, 2012 at 4:05pm*

**Trig**

IfA=340°, prove that 2cosA/2 = -(v1+sinA) - (v1-sinA)
*Thursday, January 12, 2012 at 5:12am*

**trig**

evaluate sin (11pi/6) to the nearest thousandth.
*Wednesday, January 11, 2012 at 11:49pm*

**trig**

write sec theta in terms of sin theta when theta lies in quadrant III
*Wednesday, January 11, 2012 at 11:43pm*

**trig**

what is the amplitude of y=2+cos(-1/2 theta)?
*Tuesday, January 10, 2012 at 8:22am*

**Trig**

The question is: Set up a 2 column proof to show that each of the equations is an identity. Transform the left side to become the right side. a. (tan + cot)^2 = sec^2 + csc^2 I'm having trouble with this. b. (cos + sin)/cos + (cos - sin)/sin = csc sec I'm having ...
*Sunday, January 8, 2012 at 9:48pm*

**Trig**

(sin/cos)/ ( 1/cos - 1) = I'm stumped
*Sunday, January 8, 2012 at 7:49pm*

**Trig**

Proving Identities: 2 columns (tan + cot)^2 = sec^2 + csc^2 I'm having trouble breaking down the left side to = the right side.. Any help please
*Sunday, January 8, 2012 at 7:38pm*

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