Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

TRIG
IF Y=5+7C0S 4(0-7). FIND YWHEN 0=42 DEGREES. SMALLEST POSITIVE VALUE OF 0 FOR WHICH Y=1.5
Wednesday, March 28, 2012 at 11:58am

trig
Two tracking stations are on the equator 134 miles apart. A weather balloon is located on a bearing of N 38°E from the western station and on a bearing of N 19°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
Wednesday, March 28, 2012 at 11:26am

trig
Find the other endpoint of the line segment with the given endpoint and mid point. 1. Endpoint:(-1, 9), midpoint: (-9, -10) 2. Endpoint: (2, 5), midpoint: (5, 1) 3. Endpoint:(9, -10), midpoint: (4, 8)
Wednesday, March 28, 2012 at 9:49am

trig
prove: cot^2(x)=cos(x)/(sinx)(tanx)
Monday, March 26, 2012 at 9:26pm

algebra-trig help asap
An isosceles triangle has a base 22 cm long and a base angle of 72 degrees. Find its perimeter.
Monday, March 26, 2012 at 7:50pm

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 at 11:20am

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 at 11:10am

trig
How do I prove : 4sinAcosAcos2Asin15 all over. :sin2A(tan225-2sinsquared A)is equal to. :root 6 - root 2 over 2
Monday, March 26, 2012 at 7:44am

trig
Prove: sin(x–y)sin(x+y)=sin^2(x)–sin^2(y)
Monday, March 26, 2012 at 1:09am

calculus
need help simplifying some trig identities such as: (csc t) (sin t) cos t = 0.75 and tan t = 0.88, find sec t and cot t; (cot2t) (sin2t) + sin2 t; csc2t - cot2t/sin2t
Sunday, March 25, 2012 at 9:15pm

trig
Prove: (tan x+sec x)^2 = 2sec^2(x)+2tan(x)secx-1
Saturday, March 24, 2012 at 5:10pm

trig
Prove (cscx+cotx)(cscx-cotx)=1
Saturday, March 24, 2012 at 4:10pm

Trig
Prove: (cotx sinx)(secx-cosx)=sin^2(X)
Saturday, March 24, 2012 at 3:03pm

trig
What is cosx=1/2?
Thursday, March 22, 2012 at 3:43pm

Trig
As you ride a ferris wheel, your distance from the ground varies sinusoidally with time. When the last passenger boards the ferris wheel and the ride starts moving, let your position be modeled by the diagram provided. Let t be the number of seconds that have elapsed since ...
Thursday, March 22, 2012 at 12:43pm

trig
Solve for theta, giving a general formula for all of the solution: tan(theta)=-1 sin(theta/2)=1/2
Thursday, March 22, 2012 at 12:28pm

Trig
4sin^(2)x-3=0
Wednesday, March 21, 2012 at 9:08pm

Trig
cos(3x)=-1
Wednesday, March 21, 2012 at 9:02pm

Trig
Solve Sinx=Cos2x-1 for all values between 0 and 2pi
Wednesday, March 21, 2012 at 4:34pm

trig
Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help
Wednesday, March 21, 2012 at 12:57am

trig
If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?
Tuesday, March 20, 2012 at 3:50pm

trig
if tan(θ)=√(33) / 4 (√ does not ride over 4) find sin(θ)<0 i would just like to know the steps of how to do it.
Tuesday, March 20, 2012 at 3:33pm

trig
What would be the force required to push a 100-pound object along a ramp that is inclined 10 degrees with the horizontal?
Monday, March 19, 2012 at 7:08pm

trig
if sin theta equals 3/7, what is tan theta?
Monday, March 19, 2012 at 4:12pm

trig
howard and keight who are 2km apart are on a horizontal plane observe a balloon in the same vertical plane with themselves the angles of elevation are 50 degrees and 65 degrees respectively find the height of the balloon. A.if its situated between howard and keight B.If it is ...
Monday, March 19, 2012 at 7:03am

trig
verify that 2/1+cos theta - tan squared (theta/2) = 1
Monday, March 19, 2012 at 12:09am

trig e-maths
giving that cosx=4/5 and siny=12/13, find cos(x+y) when x is acute and y is obtuse angle
Sunday, March 18, 2012 at 9:58am

trig
a plane takes off at 10.00am from an airfield, and flies at 120km/h on a bearing of N35W. A second plane takes off at 10.05am from the same airfield, and flies on a bearing of S80E at a speed of 90km/h. How far apart are the planes at 10.25am?
Sunday, March 18, 2012 at 7:29am

trig
Find the general solution for x if cos2x + sin3x = sinx
Sunday, March 18, 2012 at 5:22am

inverse trig HELP PLEASE!!
Write the general solution to y = arcsin (0.6428). 40°±360°k 140°±360°k 220°±360°k 320°±360°k How do I find the right answer? I am like seriously stuck. I need help please.
Sunday, March 18, 2012 at 12:12am

trig
In a computer simulation, a satellite orbits around Earth at a distance from the Earth's surface of 2.1 X 104 miles. The orbit is circular, and one revolution around Earth takes 10.5 days. Assuming the radius of the Earth is 3960 miles, find the linear speed (velocity) of ...
Saturday, March 17, 2012 at 10:59pm

trig
solve for theta 6. tan theta=-1 7. sin(theta/2)=1/2 thank you for your help!
Saturday, March 17, 2012 at 6:00pm

trig
when sin theta+cos theta=square root of 2,find the solution of sin^3 theta+cos^3 theta
Saturday, March 17, 2012 at 3:51pm

Algebra-Trig help asap
A rhombus has sides of 5 cm each and one diagonal is 6 cm long. Find the area of the rhombus.
Tuesday, March 13, 2012 at 5:37pm

Math:Trig.!!!!
You (safely) bungee jump from a 200-feet tall bridge in your town. Your distance above the water's surface depends on the time since you jumped. Sketch a reasonable graph.
Monday, March 12, 2012 at 10:02pm

trig
solve the equation 2 tan C-3=3 tan X-4 algebraically for all values of C in the interval odegrees lessthan or equal C lessthan360 degrees.
Monday, March 12, 2012 at 9:20pm

Trig-Algebra help asap
A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.
Monday, March 12, 2012 at 8:50pm

Trig-Algebra help asap
A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon.
Monday, March 12, 2012 at 8:49pm

Trig-Algebra help asap
A rhombus has sides of 5 cm and one diagonal is 6 cm long. Find the area of the rhombus.
Monday, March 12, 2012 at 8:17pm

Trig-Algebra help asap
The adjacent sides of a parallelogram measure 8 cm and 12 cm and one angle measures 60 degrees. Find the area of the parellelogram.
Monday, March 12, 2012 at 7:50pm

trig
SOlve over (2,pie) and find the general solution in radians. 2sin3x = square root of 2
Monday, March 12, 2012 at 7:32pm

trig
5sin(2x)+4cos(x)=0
Monday, March 12, 2012 at 6:04pm

trig
5sin(2x)+4cos(x)+0
Monday, March 12, 2012 at 6:03pm

trig
cos x/1+sin x + 1+sin x/ cos x= 2sec x
Monday, March 12, 2012 at 5:09pm

trig
verify the identity algebraically- (5-5 cos x)(5+5 cos x)=25 (sin^x)
Monday, March 12, 2012 at 5:07pm

Trig Help
Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx] =[1+sinx]/[(sinx+1)/sinx] =[1+sinx]*[sinx/(sinx+1)] =[sinx+sin^2x]/[sinx+1] =[sinx+(1-cos^2x)]/[sinx+1] =??? This is where I'm stuck. Can someone help me. Please check what I got is right so far it's...
Sunday, March 11, 2012 at 11:42pm

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
Sunday, March 11, 2012 at 7:09pm

trig
City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?
Sunday, March 11, 2012 at 7:07pm

trig
If sec theta = radical 5, what is the exact value of cos theta
Sunday, March 11, 2012 at 12:33pm

trig
If sec theta = radical 5, what is the exact value of cos theta
Sunday, March 11, 2012 at 12:32pm

trig
A ship sails 40 miles SOUTH and 15 miles EAST. Find the bearing from where it began? HELP.
Sunday, March 11, 2012 at 12:20pm

trig or geom
i have to use pythagorean theorem to find the leg-measure of x. in the formula, x would be a^2. the hypotenuse is 11 and "b" is unknown. there is also a cosine with a measure of .4 at the top-most angle.. what is x? i don't know how to use cosine with the problem
Sunday, March 11, 2012 at 10:38am

Trig.
finnd a possible measure of the angle drawn in standard position that passes through the points (ã2,-ã2)
Sunday, March 11, 2012 at 9:59am

calculus
find max, min and saddle points of the give function f(x,y)=sin(x)+sin(y)+sin(x+y) 0<=x<=pi/4 0<=y<=pi/4 i have that dz/dx=cos(x)+cos(x+y) dz/dy=cos(y)+cos(x+y) and i set them equal to zero but im kinda confused on how to really solve that. i mean i got an answer ...
Friday, March 9, 2012 at 9:30pm

Geometry/trig
A ladder, 17 feet long, leans against a wall at a 49 degree angle to the ground. How far up the wall does the ladder reach?
Friday, March 9, 2012 at 5:38pm

trig
Find all angles in degrees that satisfy the equationtan∝ +√3=0
Friday, March 9, 2012 at 4:50pm

Trig
If CSC X = 4 in the quadrant 1, what is COS X?
Friday, March 9, 2012 at 4:06pm

Alg 2 trig
Write a sine equation for period= pie, amplitude=1/2, vertical shift up 1 and phase shift left pie/4. How would the equation be written?
Friday, March 9, 2012 at 11:05am

trig
what is the exact value of cos(x+y) if tan=x sqare root 3 over 3 and sin y=square root 2 over 2?
Thursday, March 8, 2012 at 10:59pm

Trig
How do you do this? 1-sin^2x/csc^2 x-1
Thursday, March 8, 2012 at 1:52pm

Trig
HELP!!!! I dont know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x
Thursday, March 8, 2012 at 9:04am

trig
Simplify the expression cos^2 x (sec^2 x-1)
Thursday, March 8, 2012 at 8:32am

Trig Proofs!
I'm having trouble solving this proof. Can you help? cos^3+sin^3/cosx+sinx = 1-sinxcosx Thanks!:)
Thursday, March 8, 2012 at 12:50am

trig
solve each equation for è, giving a general formula for all of the solutions: 6. tanè=-1 7. sin(è/2)=1/2 Please show step by step on how to solve these. Im not sure on how to do them. Thank you for your help!
Wednesday, March 7, 2012 at 7:21pm

trig.
A ladder 20 feet long leans against the side of a house. Find the height from the top of the ladder to the ground if the angle if the angle of elevation of the ladder is 80°
Wednesday, March 7, 2012 at 6:20pm

trig
if sin a=4/5 and is quadrant 2 and sin b= 8/17 and is in quadrant 1, find cos (a-b)
Wednesday, March 7, 2012 at 6:19pm

trig
16. Let W(ƒá ) be a point in Quadrant I on the unit circle with center O. W(ƒá )B is perpendicular to the x-axis at B, OB = 0.6. and W(ƒá )B ƒ 0.8. Find:
Tuesday, March 6, 2012 at 11:33pm

Pre-Cal
given the function y=2sin3x-1, identify the following below. also show its graph for the primary cycle. (identifying parts of a trig. equation) asymptotes= k= c= axis= primary cycle= period=
Tuesday, March 6, 2012 at 1:18pm

ALG/TRIG
I cannot seem to get the right answer. Animal Pulse Rate According to one model, an animal’s heart rate varies according to its weight. The formula N(w)=885w^-1/2 gives an estimate for the average number N of beats per minute for an animal that weighs w pounds. Use the ...
Tuesday, March 6, 2012 at 6:21am

ALG/TRIG
Lost is an understatement..please help me understand this. Orbits and Distance Johannes Kepler (1571–1630)discovered a relationship between a planet’s distance D from the sun and the time T it takes to orbit the sun. This formula is , where T is in Earth years and ...
Tuesday, March 6, 2012 at 2:22am

Trig
Please help. I can't get this problem at all. When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of ...
Monday, March 5, 2012 at 10:13pm

Trig
Prove sin(α+β)sin(α-β)=cos^2β-cos^2α
Monday, March 5, 2012 at 8:23pm

Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
Monday, March 5, 2012 at 8:23pm

Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
Monday, March 5, 2012 at 8:22pm

Trig
Prove (3cosθ-4sinθ)^2+(4cosθ+3sinθ)^2=25
Monday, March 5, 2012 at 8:02pm

Trig
Prove sin(α+β)sin(α-β)=cos^2β-cos^2α
Monday, March 5, 2012 at 8:01pm

Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
Monday, March 5, 2012 at 8:00pm

trig
Q1: Prove cos^2t+4cost+4/cost+2=2sect+1/sect Q2: A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
Monday, March 5, 2012 at 7:51pm

Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
Monday, March 5, 2012 at 7:40pm

Trig
prove sin(α+β)sin(α-β)=cos^2β-cos^2α
Monday, March 5, 2012 at 7:37pm

geom/trig
A 40 ft ladder leans against a wall so the base of the ladder is 11 feet away from the base of the wall . What angle does the ladder make with the wall?
Monday, March 5, 2012 at 7:31pm

Trig
prove sin(α+β)sin(α-β)=cos^2β-cos^2α please help... this is the only one I didn't understand out of all my homework...
Monday, March 5, 2012 at 7:12pm

Trig
prove sin(α+β)sin(α-β)=cos^2β-cos^2α
Monday, March 5, 2012 at 7:00pm

trig
if sin 7x = cos x+10 find the value of x
Monday, March 5, 2012 at 6:00pm

trig
find the general solutions to the equations: 1) sec x = -2 2) 2 sin^2 x = 1 3) cos^2 x - 2cos x + 1 = 0
Monday, March 5, 2012 at 5:45pm

trig
if cot(x-10)=tan(4x) what does x equal?
Sunday, March 4, 2012 at 6:22pm

trig
Verify the trigonometric identity. Please show all steps. tanx-cotx/tanx+cotx=sin^2x-cos^2x
Sunday, March 4, 2012 at 11:40am

Trig
(cos^2t+4cos^2+4)/(cost+2)=(2sect+1)/sect
Saturday, March 3, 2012 at 8:16pm

Trig
Prove (cos^2t+4cos^2+4)/(cost+2)=2sect+1)/sect
Saturday, March 3, 2012 at 8:14pm

Trig
prove(sinx/cosx+1)+(cosx-1/sinx)=0 Please help asap!!!!! PLEASE
Saturday, March 3, 2012 at 6:09pm

Trig
prove (cscx-secx/cscx+secx)=(cotx-1/cotx+1)
Saturday, March 3, 2012 at 5:40pm

Trig
prove(sinx/cosx+1)+(cosx-1/sinx)=0
Saturday, March 3, 2012 at 5:37pm

trig
y=25sin(120t-4x) what is the wave length what is the speed
Saturday, March 3, 2012 at 3:01pm

trig and geometry
bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see the nest?
Friday, March 2, 2012 at 1:49am

trig
Which expression is equivalent to cos(4x) + cos(2x)?
Thursday, March 1, 2012 at 7:10pm

trig
bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see the nest?
Thursday, March 1, 2012 at 4:05pm

Trig FInd Translation Rule and Coordinates Thanks!
The vertices of a rectangle are R(–5, –5), S(–1, –5), T(–1, 1), and U(–5, 1). After translation, R' is the point (–11, –11). Find the translation rule and coordinates of U'. (x, y)--> (x – 6, y + 6); (–11, 7) (x, y...
Thursday, March 1, 2012 at 1:36pm

Trig
A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x = 31° and angle y = 49°, as shown in the figure. (Round your answers to two decimal places.) Find the distance of the plane from point A. Find ...
Wednesday, February 29, 2012 at 8:00pm

trig
Find the value of theta (in radians) corresponding to the point (6,-8)
Wednesday, February 29, 2012 at 4:49pm

Trig
When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of the common face is given by r=ab/a-b.
Wednesday, February 29, 2012 at 4:19pm

trig
8cos6xsin6x
Wednesday, February 29, 2012 at 3:12am

trig
Expan each of the following using the compound-angle formulae:sin(x + 20degree)
Wednesday, February 29, 2012 at 1:33am

Trig
Use a calculator to find θ to the nearest tenth of a degree, if 0° < θ < 360° and csc(θ)=1.4307 with θ in QII θ=?
Tuesday, February 28, 2012 at 5:25pm

trig
in this right trianlge ABC, m<c=90, m<a=63, and AB=10. if BC is represented by a, then which equation can be used to find a?
Tuesday, February 28, 2012 at 2:00pm

trig
solve for x log4 64+ log2 2 ________________ =x log3 81
Tuesday, February 28, 2012 at 1:49pm

math/cal/trig solve for t
solve for t: 0=4sin(2t)cos(2t)-sin(2t)
Monday, February 27, 2012 at 11:17pm

trig
Tan(cos inverse 5x)
Monday, February 27, 2012 at 10:13pm

trig
Choose the percent increase or decrease for the before and after measurements: 12 (before) and 12 (after) a) not given b) increase of 30% c) decrease of 25% d) increase of 25%
Monday, February 27, 2012 at 9:24am

trig
Name three values of theta that would result in y equal to cot times theta being undefined.
Monday, February 27, 2012 at 9:05am

tRiG/ AlGeBrA
1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4
Monday, February 27, 2012 at 2:54am

Math/Trig
Period: Asymptotes: Range: a) y= 2 sec (x) + 1 b) y= -2 csc (x - pi/2) c) y= 1 + tan (x + pi/4) d) y= 1/2 + csc (x - pi) + 1 e) y= cot (3x + pi) + 2 Any tips on drawing the graph?
Sunday, February 26, 2012 at 10:21pm

trig
sin [sin -1 (7/25) - cos -1 (-8/17)]
Sunday, February 26, 2012 at 8:29pm

trig
Let P be the point on the unit circle U that corresponds to t. Find the coordinates of P and the exact values of the trigonometric functions of t whenever possible. 2pi 3pi/4 5pi/6 Three questions. I think those are supposed to be t.
Sunday, February 26, 2012 at 4:10pm

geometry
In parallelogram TRIG, m∠R = 2x + 19 and m∠G = 4x - 17. What is m∠T
Sunday, February 26, 2012 at 1:48pm

trig
Solve for x if sin2x=cos(x+60 and x€ [-90,180].show all work details
Sunday, February 26, 2012 at 12:58pm

trig
If csc theta = 2, then what is theta approximated to 4 decimal points? RADIANS
Sunday, February 26, 2012 at 12:36pm

trig
1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x
Saturday, February 25, 2012 at 8:10pm

college Calculus Help!
Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x
Saturday, February 25, 2012 at 4:55pm

college Calculus Help!
Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3 ---> i hate trig. 3. y=4sec5x 4. y=xsin√x
Saturday, February 25, 2012 at 4:42pm

Precal
Write down 3 other possible trig forms for - 1 + isqrt2. How do you solve this?
Saturday, February 25, 2012 at 2:39am

TRIG/ALGEBRA
1) Find the exact value. Use a sum or difference identity. tan (-15 degrees) 2) Rewrite the following expression as a trigonometric function of a single angle measure. cos 3x cos 4x - sin 3x sine 4x
Friday, February 24, 2012 at 1:20am

Pre- Calculus
Evaluate the trig function tan33degress
Thursday, February 23, 2012 at 9:24pm

trig
does sec(x)tan(x)*tan(x)=[sec(x)(tan^2)x]
Thursday, February 23, 2012 at 11:58am

trig
sin(x) = 8/17 and 90 degrees < x < 180 degrees then find cos2(x)
Thursday, February 23, 2012 at 9:47am

Trig (Last URGENT)
sin2x+cosx=0 , [-180,180) = 2sinxcosx+cosx=0 = cosx(2sinx+1)=0 cosx=0 x1=cos^-1(0) x1=90 x2=360-90 x2=270 270 doesn't fit in [-180,180) what do I do? Or maybe I did something wrong. sinx=1/2 x1=sin^-1(1/2) x1=30 x2=180-30 x2=150 is this correct? Please and Thank you
Wednesday, February 22, 2012 at 11:11pm

Trig Help (URGENT)
Solve over the indicated interval: 2sin^2x=sqrt2sinx , [-180,180) don't how to get x by itself please help and thank you
Wednesday, February 22, 2012 at 10:25pm

Trig Help
Given that cos2x=7/12 and "270 equal or < 2x equal or < 360", find sinx. Please help and Thank you
Wednesday, February 22, 2012 at 4:36pm

trig
please help me with some questions I skipped on a review for our test coming up? solve 5-7 on the interval 0 greater than or equal to x less than or equal to 2pi. 5. sin x=sqrt3/2 6. cos x=-1/2 7. tan x=0 ---------------- 14. what is the exact value of tan[arcsin(.43...
Wednesday, February 22, 2012 at 12:10pm

trig
John weighed five rocks two at a time in all possible ways. The weights in pound are 30,38,41,42,45,46,50,53,58,61. How much does each rock weigh?
Wednesday, February 22, 2012 at 12:12am

trig
How king i find theta if the formula is cot(2theta) = 7/24?
Wednesday, February 22, 2012 at 12:09am

trig
The angle of elevation to the top of a very tall Building is found to be 9° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building.
Tuesday, February 21, 2012 at 10:20pm

Trig
#1 (1/sinx)(sin^2x + cos^2x(sinx/cosx) )/(sinx + cosx) = (sinx + cosx)/(sinx+cosx) = 1 Reiny helped with this question but I don't how Reiny did it. Please explain
Tuesday, February 21, 2012 at 2:28pm

Trig
3-square root 2/ 1+square root 2
Tuesday, February 21, 2012 at 9:02am

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

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