Friday
April 29, 2016

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

trig
a 7 foot tall man is standing 65 feet away from a tower. if the angle of elevation is 35 degrees. what is the height of the tower to nearest tenth of a foot?
Wednesday, April 18, 2012 by jonathan

mth, trig
Given cos a=-7/25 in quadrant II , and sin b=-12/13, in quadrant IV , find cos(a+b) and sin2a
Wednesday, April 18, 2012 by shay

Trig
Can anyone help with this question. Now suppose that, starting with the first row of seats, the floor of the seating area is inclined at an angle of Theta = 25 degrees above the horizontal, and the distance that you sit up the incline is x, as shown in the fi...
Tuesday, April 17, 2012 by Lisa

Trig
Can you show us how to use law of cosines to show that theta equals inverse cosine of (a^2 + b^2 -484)/(2ab) where a^2=(7+xcos a)^2 + (28-xsin a)^2 and b^2=(7+xcos a)^2 + (xsin a -6)^2? Thanks
Tuesday, April 17, 2012 by Lisa

trig
A 100 kg box slides with constant velocity down a ramp inclined at 20 degrees, with the horizontal. Find the frictional force acting on the box.
Tuesday, April 17, 2012 by Tsuki

Trig
How do you find the exact circular function value of csc(-23pi/6)? I dont know how to do the pi symbol on the keyboard.
Monday, April 16, 2012 by Bailie

trigonometry
given that sin alpha/2 = 2/3, and that alpha/2 is in quadrant II, determine the exact values of all trig functions for alpha.
Sunday, April 15, 2012 by kiko

trig
A submersible traveling at a depth of 250 feet dives at an angle of 15 degrees with respect to a line parallel to the water's surface. It travels a horizontal distance of 1500 feet during the dive. What is the depth of the submersile after the dive?Explain how the angle of...
Sunday, April 15, 2012 by Sara

Math- Trig
1. Determine the exact value of cos^-1 (pi/2). Give number and explanaton. 2. Determine the exact value of tan^-1(sq. root 3). with explanation. 3. Determine exact value of cos(cos^-1(19 pi)). with explanation. 4. Determine the exact value of sin(sin^-1(20 pi)). with ...
Saturday, April 14, 2012 by Crystal

Trig/PreCalc
Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. ...
Friday, April 13, 2012 by tabby

Trig
How do i find the exact value of sin 15 using the half angle formula
Friday, April 13, 2012 by Briana

Trig
can I please have help with these 3 questions? 1. Solve this equation graphically on the interval [0, 2ð]. list the solutions. sin(2x)-1=tan x 2. solve sin x cos x= sqrt3/4 3. solve tan^2 x-3tan x+2=0 thank you! show step by step please.
Friday, April 13, 2012 by BreAnne

algebra-trig help ASAP
Can someone please help me understand how to graph y=3cos(x/4)-5
Thursday, April 12, 2012 by missy

algebra-trig
Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
Thursday, April 12, 2012 by missy

algebra-trig
Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
Thursday, April 12, 2012 by missy

Math - Trig
A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? I just can't figure it out.
Wednesday, April 11, 2012 by Amy

microsoft excell 2007
entering the formula=SUM(C5:C18)is cell C19 will resolve in which of the following? (a)cells C5 and C18 will be added together (b)cells C5 and C18,and C19 will be added together (c)the total of cells C5 to C19 will appear in cell C19 (d0the total of cells C5 to C18 will appear...
Wednesday, April 11, 2012 by susue

microsoft excell 2007
when working with predefined formulas in excel,what category contains the boolean functions? (a)math and trig (b)recently used (c)logical (d)auto sum my answer is c debbie needs to print her table.which of the following is not an excel print program? (a)title (b)table (c)...
Wednesday, April 11, 2012 by susue

trig/precalc
a car's flywheel has a timing mark on it's outer edge. the height of the timing mark on the rotating flywheel is given by y=3.55sin[x - (pi/4)]. graph one full cycle of this function. I was not taught how to graph a function like this, only the simple y= sin x and y= ...
Tuesday, April 10, 2012 by tabby

Trig
Rewrite 7pi/5 in degrees.
Tuesday, April 10, 2012 by Rina

trig
solve the equation of the domain 0¡Ü¦È¡&Uu​ml;2¦Ð 3cos^2theta - 5costheta -1 = 3sin^2theta
Monday, April 9, 2012 by Amanda

Trig
A ferris wheel has a 14 meter diameter and turns counterclockwise at 6 rpm. a) Assuming that the center of the wheel is the origin of an x-y coordinate plane, write functions to find the position (x,y) of a rider that starts at the bottom of the wheel. b) Where is the rider 2 ...
Sunday, April 8, 2012 by Lisa

Trig
Find the supplement of pi/6
Sunday, April 8, 2012 by YOLO

Trig-desperate
f(x)=sin2x and g(x)=1/2tanx for x is the element of [-90;180] 8.1)calculate the x-coordinates of the points of intersection of f and g.
Sunday, April 8, 2012 by Piwo

TRIG
Factor 4cos^2x+4cosx-1=0
Saturday, April 7, 2012 by Katie

Trig
Factor 4cos^2x+4cosx-1=0
Saturday, April 7, 2012 by Katie

Trig
What is the supplement of 3pi/5?
Saturday, April 7, 2012 by Jenn

Trig
Complete the following statement. (1-sinθ)(1+sinθ)
Saturday, April 7, 2012 by Jenn

Trig
Find the co terminal angle for 15pi/4
Saturday, April 7, 2012 by Jenn

Trig
19pi/7 Which quadrant does the terminal side lie on?
Saturday, April 7, 2012 by Jenn

Trig-help please
Sin23=p write cos113 in terms of p
Friday, April 6, 2012 by Piwo

Trig Help Please!!!
Find the indicated angle è. (Use either the Law of Sines or the Law of Cosines, as appropriate. Assume a = 95 and c = 137(angle B=38). Round your answer to two decimal places.)
Thursday, April 5, 2012 by Adam

trig
if one of a quadratic equation is 1/2-2i, what is the equation. the other root is 1/2+2I but i dont know how to find the equation
Thursday, April 5, 2012 by Jess

trig
if sin2x=3sin2y, find 2tan(x-y)
Thursday, April 5, 2012 by afdafd

alg2/trig
If 4x^2+9=kx, what value of k will produce equal roots? the answer is 12 but i dont understand how you get it, please help!
Thursday, April 5, 2012 by lisa

Trig.
Find to the nearest degree, all values of ө less than 360˚ that satisfy the equation 2tan^2θ-2tanθ=3
Thursday, April 5, 2012 by Rach

Trig.
What is the trigonmetric fact for sin 3.14/8?
Thursday, April 5, 2012 by Randy

trig
simplify cox^2x-cos^4x
Thursday, April 5, 2012 by BOB

trig
Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
Thursday, April 5, 2012 by Piwo

trig
Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
Thursday, April 5, 2012 by Piwo

trig
If sin A= 1/4 and sin B= -1/2, with A in QII and B in QIV, find tan(A+B)
Thursday, April 5, 2012 by Chase

Trigonometry
I'm having a lot of trouble with graphing trig functions. Can anyone tell me how to graph this equation on a graphing calculator? Sketch the graph of y= sin x in the interval 0 ≤ x ≤4π
Tuesday, April 3, 2012 by Peter pan

trig
what is the amplitude of f(X)=-6sin(3x-7)
Tuesday, April 3, 2012 by Anonymous

trig
cos(sin^-1 x)=sq rt(1-x^2) prove the identity
Monday, April 2, 2012 by Emily

trig
2cos^2 22.5-1 (find exact value)
Monday, April 2, 2012 by kk

Trig
1)y=1-tan(3pi-2x) Find period and phase shift 2)y=-sin(5x+3) Find amplitude,period,and phase shift 3)y=1-sin(3pi-2x)Find amplitude,period,and phase shift 4)y=2csc(2x-1)Find period and phase shift 5)Given the graph of y = sin (x), what transformation can be made to make the ...
Sunday, April 1, 2012 by Lauren

Trig
y=sin(2pi*x-pi) find the amplitude, period, and phase shift
Sunday, April 1, 2012 by Lauren

Trig
y=sec(2x+1) Find the period and phase shift. Sorry i'm really bad at these.
Sunday, April 1, 2012 by Lauren

Trig
y=2tan(x-1) Find the period and phase shift.
Sunday, April 1, 2012 by Lauren

trig
Give the following for the function: y=2+cos(5x+3.14 Amplitude: Period: Phase Shift:
Sunday, April 1, 2012 by Emily

Trig
A 7.25 inch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.
Sunday, April 1, 2012 by Emily

Trig
A carousel with a 50-foot diameter makes 4 revolutions per minute. a) Find the angular speed of the carousel in radians per minute. b) Find the linear speed in feet per minute of the platform rim of the carousel.
Sunday, April 1, 2012 by Emily

Trig.
Josh kicks a soccer ball with an initial velocity of 18 feet per second out of a window from a height of 12 feet. The function h(t)= -16t^2+18t+12 represents the height of the soccer ball after t seconds.What is the domain of this function in the context of this problem?
Sunday, April 1, 2012 by Rach

Trig
Why does 11.4(7pi/18)=133pi/30 ?
Sunday, April 1, 2012 by Robin

Trig
Solve the equation 2sin(2x) = cos x. and Solve the equation cos^2(2x)–sin^2(2x)= (√3 / 2).
Sunday, April 1, 2012 by Help

Trig
Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answers. cos(pi/16)
Sunday, April 1, 2012 by Help

Trig Circular Motion
A es004-1.jpginch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.
Saturday, March 31, 2012 by Emily

Trig
A ferris wheel at the fair has a radius of 60 feet. If it takes 24 seconds to make a full revolution, what is the linear speed for the passengers?
Saturday, March 31, 2012 by Emily

trig
2sin^2x-1=0[0,2pi)
Thursday, March 29, 2012 by Sur

Geom./Trig.
an airplane flies directly overhead at 540mph. 1 minute later is seen at an angle of elevation of 34 degrees. how far did the airplane fly during that time? what is the elevation of the plane?
Wednesday, March 28, 2012 by Emma

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 by BRASHUNDA

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 by Anonymous

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 by drew

trig
prove: cot^2(x)=cos(x)/(sinx)(tanx)
Monday, March 26, 2012 by Help

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 by missy

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 by Help!!!HElp!!!Help!!!

trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x - 1
Monday, March 26, 2012 by Help!!!HElp!!!Help!!!

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 by michelle

trig
Prove: sin(x–y)sin(x+y)=sin^2(x)–sin^​2(y)
Monday, March 26, 2012 by Carl

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 by angelia

trig
Prove: (tan x+sec x)^2 = 2sec^2(x)+2tan(x)secx-1
Saturday, March 24, 2012 by Anonymous

trig
Prove (cscx+cotx)(cscx-cotx)=1
Saturday, March 24, 2012 by Blossom

Trig
Prove: (cotx sinx)(secx-cosx)=sin^2(X)
Saturday, March 24, 2012 by Blossom

trig
What is cosx=1/2?
Thursday, March 22, 2012 by Jaime

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 by TRig

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 by Help

Trig
4sin^(2)x-3=0
Wednesday, March 21, 2012 by Help

Trig
cos(3x)=-1
Wednesday, March 21, 2012 by One Directioner

Trig
Solve Sinx=Cos2x-1 for all values between 0 and 2pi
Wednesday, March 21, 2012 by dfg

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 by Help

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 by Help

trig
If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?
Tuesday, March 20, 2012 by people

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 by person

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 by greenburrow

trig
if sin theta equals 3/7, what is tan theta?
Monday, March 19, 2012 by Anonymous

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 by carlo

trig
verify that 2/1+cos theta - tan squared (theta/2) = 1
Monday, March 19, 2012 by jake

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 by edward damia

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 by Anonymous

trig
Find the general solution for x if cos2x + sin3x = sinx
Sunday, March 18, 2012 by Tiana

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 by Adrianna

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 by John

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

trig
when sin theta+cos theta=square root of 2,find the solution of sin^3 theta+cos^3 theta
Saturday, March 17, 2012 by joan

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 by Missy

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 by Claries

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 by Anonymous

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 by Missy

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 by Missy

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 by Missy

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Homework Help: Math