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March 27, 2015

March 27, 2015

**Recent Homework Questions About Trigonometry**

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**precalc/trig help please**

The area of a circle is 18pi square meters. What is the radius (leaving answer in simplest radical form)
*Tuesday, February 21, 2012 at 8:48am*

**trig**

Since cot x = cos x / sin x, if cot x = 1/2, with the angle x in the first quadrant, then cos x = 1 and sin x = 2 (1) State true or false. Is this a possible situation? (2) If false, explain why.
*Monday, February 20, 2012 at 8:07pm*

**trig**

The minute hand of a clock is 6 inches long. What distance does its tip move in 16 minutes?
*Monday, February 20, 2012 at 5:52pm*

**trig**

evaluate tan(51 degree 15')+cot(25 degrees 18')
*Monday, February 20, 2012 at 10:33am*

**trig**

y= sin x/2, 0 less than equal to x less than equal to 4pi... the question says state the amplitude and period for each equation and graph it over the indicated interval
*Sunday, February 19, 2012 at 8:08pm*

**trig**

53. A 60-foot drawbridge is 24 feet above water level when closed. When opened the bridge makes an angle of 33 degrees with the horizontal. a. How high is the tip P of the open bridge above the water? b. When the bridge is open, what is distance from P to Q? 53. A 60-foot ...
*Friday, February 17, 2012 at 5:58am*

**trig**

how to graph y = 1/2 cos 2x for 0 ≤ x ≤ 2 p
*Thursday, February 16, 2012 at 7:37pm*

**Trig**

what is the amplitude, period, phase shift, and vertical shift of each equation? 1. y= A cos(B(x-3))+4 2. y=-2sin(2piX/3) 3. y=4cos(3pi(x+3)) 4. y= -3cos(2(x-pi/4))+0.4 thank you so much!
*Thursday, February 16, 2012 at 4:20pm*

**trig**

Describe the possible values of variable a such that (/72) + (/a) can be simplified to a single term. Note: (/a) is the square root of a.
*Wednesday, February 15, 2012 at 10:16pm*

**trig**

Prove 1+cos X/1-cos X = (csc X + cot X)squared
*Wednesday, February 15, 2012 at 9:45pm*

**Algebra-Trig Please Help ASAP**

A balloon isin the vertical plane of two consecutive milestones of a road. The angles of depression of the stones as viewed from the balloon are 15 degrees and 17 degrees. Find the height of the balloon if (a) the stones are on opposite sides of the balloon, (b) the stones are...
*Wednesday, February 15, 2012 at 9:07pm*

**trig**

cos^4 15-sin^4 15 with out using calculator
*Wednesday, February 15, 2012 at 7:45pm*

**trig**

If cosecant of theta equals 3 and cosine of theta is less than zero, find sine of theta, cosine of theta, tangent of theta, cotangent of theta and secant of theta
*Wednesday, February 15, 2012 at 6:43pm*

**trig**

from an observer tower, a ff.above the level of a river,the angle of depression of a point on the near shore is theta and that of a point directly beyond on the far shore is FI. show that the width of the river is a (cotan theta=p+q/r)
*Wednesday, February 15, 2012 at 6:19am*

**trig**

right triangle has an acute angle of 24.8 and an adjacent length of 145 what is the side opposite of the acute angle
*Tuesday, February 14, 2012 at 8:09am*

**trig**

refer to right triangle ABC with C = 90degrees. Given a= 2 and b=√5 Find the six trigonometric functions of A. and find the angles A and B
*Monday, February 13, 2012 at 9:44pm*

**Math [Trig]**

how do you find a full cycle of a trigonemtric function?
*Monday, February 13, 2012 at 5:39pm*

**trig**

CSC(theta)=1.92 Find Theta. Now I know CSC = 1/sin but no matter how I enter it into my cal I get an error.
*Monday, February 13, 2012 at 6:38am*

**Algebra/Trig Check Answers please **

Please check these answers thanks. 1. The shadow of a vertical pole is 24.8 feet long when the angle of elevation of the sun is 42degrees 0.0'. Find the height of the pole. Answer: 22.3=height 2. From a point on a lighthouse 108 feet above water, the angle of depression of...
*Saturday, February 11, 2012 at 4:52pm*

**Algebra/Trig Check Answers please **

Can you please check these answers thanks 1. A ladder 14 feet long is leaning against a house. The foot of the ladder is 4.8 feet from the house. Find the angle of elevation of the ladder and the height it reaches on the house. Answer: 13.2=height 18.9 =angle of elevation 2. ...
*Saturday, February 11, 2012 at 4:47pm*

**Math/trig**

Log radical b/ a^2 is equivalent to 1) 1/2 log b + 1/2 log a 2) l/2 log b- 2 log a 3) 2 log b - 1/2 log a 4) 1/2logb/2 log a
*Saturday, February 11, 2012 at 1:27pm*

**Math/Trig**

Which logarithmic equation is equivalent to L^m = E 1) LogL E = m 2) logE L = m 3) logm E= L 4) logE m= L
*Saturday, February 11, 2012 at 1:25pm*

**trig**

The hypotenuse of the right triangle PQR is 16ft. length. The sine of the angle <P is 3/5. How many feet long is the line if QR?
*Saturday, February 11, 2012 at 1:20pm*

**trig**

If theta is an angle in standard position, state in what quadrants its terminal side can lie if theta is equal to -415 degrees?
*Friday, February 10, 2012 at 7:34pm*

**TRIG**

In a right triangle ABC, C = 90°, b = 380.1 inches and c = 589.1 inches. Solve for all the missing parts using the given information. (Round each answer to one decimal place for side and to two decimal places for angles.) A = ° B = ° a = inches IM lOST!
*Friday, February 10, 2012 at 3:33pm*

**trig**

I dont understand this. can you please tell how you got each answer? describe how the graph of each function is related to a basic trigonometric graph. 1. y= 1/2cos x 2. y= 2cos x+1 3. y= sin x-4 4. y= sin(x-4) 5. y= sin(3x) 6. y= cos(1/2x) 7. y= -cos x 8. y= -cos x+2 9. y= -...
*Friday, February 10, 2012 at 12:41am*

**trig**

if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
*Wednesday, February 8, 2012 at 9:11pm*

**trig**

Find sin t,cos t and tan t when the terminal side of an angle of t radians passes through ( -3/5 , -4/5) on the unit circle.
*Wednesday, February 8, 2012 at 9:08pm*

**trig**

Find sin t ,cos t and tan t when the terminal side of an angle of t radians passes through (2 , 7)
*Wednesday, February 8, 2012 at 8:59pm*

**trig**

Find sin t ,cos t and tan t when the terminal side of an angle of t radians passes through (2 , 7)
*Wednesday, February 8, 2012 at 8:58pm*

**trig**

Given theta is in the standard position and is in the first quadrant , if the terminal side of the angle theta is parallel to the line y=x+4 on ,find the measure of theta in degrees.
*Wednesday, February 8, 2012 at 8:56pm*

**trig**

Given theta is in the standard position and is in the first quadrant , if the terminal side of the angle theta is parallel to the line on ,find the measure of theta in degrees.
*Wednesday, February 8, 2012 at 8:47pm*

**trig**

Solve the equation 2 tan C - 3 = 3 tan C-4 algebraically for all values of C in the interval 0 degrees <_ C < 360 degrees
*Wednesday, February 8, 2012 at 6:59pm*

**trig**

If the value of sin theta =12/13 then find the value of 1-cos theta/1+cos theta.
*Wednesday, February 8, 2012 at 1:51am*

**Trig**

If sin(t)=4/5 & 0<t<pi/2, find the following: a)sin t(-t) b) sin(t-2pi) c)cos t d)cos(pi-t)
*Wednesday, February 8, 2012 at 12:59am*

**Trig**

if tan(x)=9/4, find cos(x) if pi<x<3pi/2
*Wednesday, February 8, 2012 at 12:56am*

**Trig**

Help please! Thank you! If csc(theta)= -2 and theta lies in Quadrant III, find tan(theta).
*Tuesday, February 7, 2012 at 8:55pm*

**trig**

if (0,-7) lies on the terminal side of angle theta in standard position, find each value sec(theta) , cot(theta) and sin(theta)
*Monday, February 6, 2012 at 9:19pm*

**TRIG HELP ASAP**

I really need help on this problem. A sector has area of 15 in^2 and central angle of 0.2 radians. Find the radius of the circle and arc length of the sector
*Monday, February 6, 2012 at 7:48pm*

**Geometry/trig**

A plane is flying due south at a speed of 300 mph. The wind is blowing from the west at a speed of 40 mph. Find the resultant speed of the plane and the direction of the plane
*Monday, February 6, 2012 at 4:40pm*

**trig**

tan theta= square root of 3 / 3 if o degrees is less than or equal to theta less than o equal to 360
*Monday, February 6, 2012 at 12:31am*

**Calculus**

Integrate [1/square root of(e^(2x)-1)]. I have to use u substitution. We are doing the integrals of inverse trig functions, but I cannot get it to work out!
*Sunday, February 5, 2012 at 10:43pm*

**trig**

A race driver has a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.5 m/s^2; after 3.6 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant ...
*Sunday, February 5, 2012 at 12:17am*

**trig**

If tan theta = sin theta, and theta is greater than or equal to 0 and less than or equal to 2 pi. find cos theta and what is theta
*Saturday, February 4, 2012 at 9:43pm*

**trig**

What is the domain, range, and period of y= sin x + 1 What is the domain, range, and period of y= -cos x Can someone please help?
*Friday, February 3, 2012 at 1:41pm*

**Trig**

can you please simplify these in faction form? (pi/3) +1=? (2pi/3) +1=? (3pi/4) +1=? (5pi/4) +1=? (5pi/3) +1=? thank you so much!
*Friday, February 3, 2012 at 1:21pm*

**Trig**

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? angle A=60, angle B=30, angle C=90 the triangle has a height of 10
*Friday, February 3, 2012 at 12:18pm*

**trig**

use the discriminant to solve for the smallest value of b that would make the roots of the equation x^2+bx+5=o imaginary
*Thursday, February 2, 2012 at 8:14pm*

**trig**

what is the correct answer in trigonometric identities. DiViDE ; x^5 + 5x^4 - 2x^3 + 3x^2 + 2x + 1 by x + 3
*Thursday, February 2, 2012 at 7:15am*

**trig**

what is the correct answer in proving trigonometric identities if tan theta / sin theta = sec theta
*Thursday, February 2, 2012 at 7:12am*

**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*

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