Monday

June 29, 2015

June 29, 2015

**trig**

use trig identities to rewrite: (1/(1-cos4v))-(1/(1+cos4v))
*Friday, August 26, 2011 by liz*

**calculus**

Find two unit vectors that make an angle of 60° with v = ‹3, 4›. Give your answers correct to three decimal places. I'm not sure what to do here; I believe that I use to definition of a dot product (or maybe cross product) with relation to the trig function (...
*Wednesday, August 24, 2011 by angles*

**trig**

what is the reference angle for 17 pi/12?
*Tuesday, August 23, 2011 by Brandon*

**Trig**

Find values of all six trig functions if sin(theta)= 4/5 and theta is in the second quadrant.
*Tuesday, August 23, 2011 by Lucy*

**trig**

cos@-4SIN@=1 then sin@+4cos@=
*Sunday, August 21, 2011 by bhavya*

**trig**

If 2tanA+cot A=tan B, then prove that 2tan(B-A)=cot A
*Sunday, August 21, 2011 by santosh*

**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. 1. Each of the ferris wheel's cars travels around a cirlce. a) Write an equation of the circle where x and y are measured...
*Saturday, August 20, 2011 by Chris*

**trig**

(sec theta + cosec theta) (sin theta +cos theta) = 2 + sec theta cosec theta
*Saturday, August 20, 2011 by Jancy*

**trig**

a plane is flying with airspeed of 140 mph and heading 280 degrees. The wind currents are running at 20mph at 260 degrees clockwise from due north. Find the true course and ground speed of the plane.
*Friday, August 19, 2011 by Frankie*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 by parminder*

**trig**

sina=^10 sinb=^5 find a+b if a,b are acute angles
*Friday, August 19, 2011 by Anonymous*

**trig**

how do you find all the values of theta from 0 degrees through 360 degrees for which sin theta equals 0
*Thursday, August 18, 2011 by jen*

**trig**

i can not figure out how to write the complex number in rectangular form the question is 4(cos 5Pie/6 + i sin 5 pie/6)
*Wednesday, August 17, 2011 by fred*

**Trig**

Find the polar coordinates of (8, –8) for r ≥ 0. I am getting 8 square root of 2 as the first coordinate. I am not sure if I am finding the arctan correctly.
*Monday, August 15, 2011 by Dara*

**trig and cotagent**

Evaluate cot(11pi/6) to the nearest hundredth (given in radians).
*Monday, August 15, 2011 by saad*

**trig**

Solve the equation for cos theta-tan theta=0 for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi, if possible form the following choices: pi , 5pi A. --- ---- 4___ 4 B. pi 3pi 5pi 7pi ----- '----- '-----'----- 4_____ 4_____ ...
*Monday, August 15, 2011 by saad*

**trig**

Solve the equation for cos(3theta/2).tan(3theta/2)for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi.
*Monday, August 15, 2011 by saad*

**trig**

sin2xcosx-sinx=0 interval(0,2pi)
*Sunday, August 14, 2011 by Anonymous*

**trig**

Find the smallest positive value of x(in degree) for which tan(x+100°)=tan(x+50°)*tanx*tan(x-50°)
*Saturday, August 13, 2011 by SONU*

**trig**

A tower is supported by a guy wire from the top of the tower to the ground 16 ft from its base. The wire makes an angle of 62 with the ground. The length of the wire is a. 30.09 ft b. 18.12 ft c. 28.41 ft d. 34.08 ft
*Friday, August 12, 2011 by Val*

**Trig/pre-calc**

r=8cos(theta)+5sin(theta), convert the polar equation into a rectangular equation and then complete the square and determine the center radius...? Help?! I missed the section, and am not getting anywhere with the text...
*Friday, August 12, 2011 by A*

**trig**

Find sin(2theta) if tan of theta = 7/24, pi < theta < 3pi/2 ?
*Tuesday, August 9, 2011 by Anonymous*

**trig**

If z=1+i, then the multiplicative inverse of z esqaire is:
*Monday, August 8, 2011 by Anonymous*

**trig**

Find sec theta if theta=3/4 in Q1
*Sunday, August 7, 2011 by andy*

**Pre-calculus**

find the trig functions of angle x if the terminal side of x passes through the point (-12, 5).
*Sunday, August 7, 2011 by Lala Kennedy*

**Precalculus**

How would you solve this trig function: cos2x=sin^2-2 how do you know what trig identities to use?
*Saturday, August 6, 2011 by Jess*

**Geometry**

30-60-90 triangle has a hypoteneuse of 10 use trig to find the short side
*Wednesday, August 3, 2011 by Christa*

**Math**

What are some examples of exponential function (Using the formula: Al = A0(1/2)^t/h ), trig functions that are used to find amplitude, period, max, min etc., and combinations of transformation at home or in life in general?
*Saturday, July 30, 2011 by Kate*

**trig**

An arc subtends an angle 15 degrees at the centre of the circle. If the radius is 4 centimetres, find the area of the sector?
*Friday, July 29, 2011 by Sulaksha*

**Trig**

A car is traveling at a speed of 55 mph with a bearing of 210°. What vector represents the velocity?
*Thursday, July 28, 2011 by bob*

**Pr-Cal/Trig**

1)if the graph of f(x)=cotx is transformed by a horizontal shrink of 1/4 and a horizontal shift left pi, the result is the graph of: a) g(x)= cot[1/4(x-pi)] b) g(x)=cot[1/4(x+pi)] c) g(x)=cot[4(x-pi)] d) g(x)=cot[4(x+pi)] e) g(x)=cot[4x+pi] please include how you got the answer
*Monday, July 25, 2011 by Ashley*

**Trig**

Find [4(cos115+isin115)]^6
*Monday, July 25, 2011 by Jack*

**pre calculus 2**

use the fundamental trig. Identities to simplify tan^4x+2tan^2x+1
*Sunday, July 24, 2011 by denise *

**math**

mr. pursley, have you ever worked geo., trig. etcwith no calu.s with the heat on , when it had to be right?wheather you blew up your target or something else or the bld. collapsed or was built in the correct place? i'm not an answer grazer, but qam an answer seeker.I'm...
*Friday, July 22, 2011 by mac*

**Trig: Conics**

Sketch the graph and find following info: Vertex: Focus: Directrix: Axis of Symmetry: Ends of Latus Rectum: (x-2)^2=4(y-3) I think the vertex is (2,3) is this correct, and how do I proceed on? Thank you!
*Wednesday, July 20, 2011 by EVJ*

**Trig**

Find an equation for the hyperbola described. Foci at (-4,0) and (4,0); asymptote the line y= -x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem.
*Tuesday, July 19, 2011 by EVJ*

**Trig**

A bridge is built in the shape of a parabolic arch. The bridge has a span of s= 160 feet and a maximum height of h= 25 feet. Choose a suitable rectangular coordinate system and find the height of the arch at distances of 10, 30, and 50 feet from the center. 10= 30= 50=
*Monday, July 18, 2011 by EVJ*

**trig**

Find the exact value of the trigonometic function at the given real number of cot(5pi/3)
*Sunday, July 17, 2011 by Anonymous*

**Trig math**

How do I solve for x? cos(4x)(2+tan^2x)=8
*Thursday, July 14, 2011 by Shiv*

**trig**

How do i solve Cos (4x)(2+tan^2X0 = 8?
*Thursday, July 14, 2011 by Anonymous*

**trig**

Given that SIN Theta = -1/sqrt(10) and theta is in quadrant 4, find sin2theta and cos2theta. I'm not sure how to properly square the -1/sqrt10 and keep an exact answer other than decimal. Otherwise, my final answer is Sin2Theta = -.7255970691 and cos2theta = 1.632455533
*Wednesday, July 13, 2011 by Joe*

**trig**

An airplane has an airspeed of 450 km/hr bearing N45E. The wind velocity is 30 km/hr in the direction N30W. What is the ground speed and what is its direction?. I have gotten this far: A= 450cos(45), 450sin(45) = (318.20, 318.20) W= 30cos(120), 30sin(120) = (-15, 25.98) A+W= ...
*Wednesday, July 13, 2011 by VEJ*

**trig**

Verify that each trigonometric equation is an identity tan^2+1/sec Î± =sec Î±
*Wednesday, July 13, 2011 by maria*

**trig**

During a 12-hour period, the tides in one area of the Bay of Fundy cause the water level to rise to 6 m above average sea level and to fall 6 m below average sea level. The depth of the water at low tide is 2 m as measured against a pier. a.) Suppose the water is at average ...
*Wednesday, July 13, 2011 by Sean*

**trig question...**

During a 12-hour period, the tides in one area of the Bay of Fundy cause the water level to rise to 6 m above average sea level and to fall 6 m below average sea level. The depth of the water at low tide is 2 m as measured against a pier. a.) Suppose the water is at average ...
*Tuesday, July 12, 2011 by Sean*

**Math-trig.**

1)sinx+cosx=1 2)sinx+cosx=1+sin2x
*Friday, July 8, 2011 by lisa*

**trig**

find cos (x/2) when sint =12/13
*Thursday, July 7, 2011 by Raquel*

**trig**

1=2pi times the square root of (L/9.8)
*Wednesday, July 6, 2011 by Mani*

**trig**

sin^2(3 theta+5pie)+cos^2(3 theta+5pie)= ?
*Wednesday, July 6, 2011 by Anonymous*

**trig**

N 5 22x2 1 76x 1 430 Use the equation to find N for each year in the table. (b) Discuss how well this equation approximates the data. (c) Rewrite the equation with the right side completely factored. (d) Use your equation from part (c) to find N for each year in the table. Do ...
*Friday, July 1, 2011 by mmmm*

**trig**

An airplane flying at 600 miles per hour has a bearing of 152 degrees. After flying for 1.5 hours, how far north and how far east will the plane have traveled from point of departure?
*Thursday, June 30, 2011 by Anonymous*

**trig**

Evaluate the expression cos 22 degrees and sec 22 degrees
*Thursday, June 30, 2011 by Dee Mitchell *

**trig **

A 115 foot foot casts a 147 foot shadow, what is the degree of elevation to the sun
*Tuesday, June 28, 2011 by mike *

**trig**

y=7sin20degrees/5
*Monday, June 27, 2011 by rita*

**Trig**

A plane is flying at 240 mph heading North 60 degrees East. The wind is blowing at South 30 degrees East at 30 mph. What is the largest and smallest angles?
*Saturday, June 25, 2011 by Anonymous*

**trig**

sinx+sinxcot^2x=cscx prove each identity
*Friday, June 24, 2011 by tom*

**trig**

tan(theta)-1= sin^2(theta)-cos^2(theta)/ sin(theta)cos(theta)+cos^2(theta) prove each identity
*Friday, June 24, 2011 by tom*

**Algebra/Trig**

The members of a men’s club have a choice of wearing black or red vests to their club meetings. A study done over a period of many years determined that the percentage of black vests worn is 60%. If there are 10 men at a club meeting on a given night, what is the ...
*Monday, June 20, 2011 by jelanietux*

**trig**

the angle in one regular polygon is to that in another as 3:2 and the number of the sides in first is twice that in second determine the the number of sides of 2 polygons
*Sunday, June 19, 2011 by seema*

**Trig**

The graph of y = 7cosx + 24sinx would be a sinusoid if it were plotted. What would be the first positive value of x at which there is a high point?
*Friday, June 17, 2011 by Randy*

**trig**

1. if sin 2A = Psin2B, prove that tan(A+B)/tan(A-B)=P+1/P-1.
*Tuesday, June 14, 2011 by seema*

**trig**

Why are the quadrants situated and numbered the way they are.What is the purpose.
*Monday, June 13, 2011 by Dave*

**trig**

how high is a tree that casts a 30 ft shadow at the same time a 10 ft pole casts a shadow which is 10 ft long?
*Sunday, June 12, 2011 by Anonymous*

**Trig**

Find the amplitude, period, and phase shift of the following function: y=-2cos2(θ+45)
*Saturday, June 11, 2011 by Tianna*

**Trig**

URGENT, Please answer this question: give the value of: Tan(Arctan x+1/x-1+Arctan x-1/x)
*Saturday, June 11, 2011 by Mike*

**trig**

if alpha and beta are 2 different values of θ lying between 0 and 2π which satisfy the equation 6cosθ+8 sinθ=9 find the value of sin alpha + beta
*Saturday, June 11, 2011 by usha*

**TRIG..............**

Q.1 Prove the following identities:- (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx (ii) (1+cotx+tanx)(sinx-cosx)/sec^3x-cosec^3x = sin^2xcos^2x.
*Friday, June 10, 2011 by MATHS*

**Trig**

give the value of tan(arctan x+1/x-1+arctanx-1/x)
*Thursday, June 9, 2011 by Mike*

**aleg/trig**

two forces of 14and 30 act on a body forming an obtuse angle w/ eachother. if the resultant is 60, whats the angle betweeen the 2 forces?
*Thursday, June 9, 2011 by Angel*

**alegbra/trig**

x^2+2x-15=0 solve by completing the square
*Thursday, June 9, 2011 by Angel*

**Math - Trig**

Let Vector V(t) = 2pi t î + 2pi t ĵ. Find the vector V(1/3). Where is the vector after the next 1/3s? What is the angular speed?
*Thursday, June 9, 2011 by Susan*

**algebra/trig**

1.Find the domain f(x)=ã(x^(2)-9) 2. Find all six trig functions for (-3,4)
*Wednesday, June 8, 2011 by Mike*

**trig**

I get that we have to put it into radical form, but I don't understand the process. Can someone walk me through it and explain it? arccos(-1/2)
*Tuesday, June 7, 2011 by Master chief*

**trig**

FInd the exact value pf the 6 trig function of alpha Given: point (-2,-6) on the terminal side of the angle in standard position sin alpha cos alpha tan alpha sec alpha csc alpha cot alpha
*Tuesday, June 7, 2011 by jacara*

**Trig**

Evaluate (if possible) the sine,cosine, and tangent of the angle 10pi/3
*Monday, June 6, 2011 by Master chief*

**Trig**

Find (if possible) the trig function of the quadrant angle. sec 3pi/2
*Monday, June 6, 2011 by Master chief*

**Trig**

Find (if possible) the trig function of the quadrant angle.
*Monday, June 6, 2011 by Master chief*

**algrebra 2 / trig**

solve the triangle a=1 b=2 C=50 degrees
*Monday, June 6, 2011 by rosemary flores*

**trig**

How can I get rid of the square roots in this fraction? sqrt((2-sqrt3))/sqrt((2+sqrt3)) the answer is 2-sqrt3 but I don't know how they arrive at it.
*Sunday, June 5, 2011 by lovemath*

**trig**

please help. show step by step how to solve h(x)=2 cot(x/2) Identify period identify x-intercepts identify asymptotes
*Sunday, June 5, 2011 by amanda*

**trig**

on the same set of axes: (0 degrees is greater than or equal to x and x is less than or equal to 360 degrees) (a) sketch the graphs of y= sin degrees ,y=2sinx degrees and y=sin2x degrees
*Saturday, June 4, 2011 by Ruby*

**trig**

Given Tangent theta = -5 on 4 and cos theta >0, find sine theta and sec theta
*Saturday, June 4, 2011 by Ruby*

**Trig**

Find all solutions of the equation on the interval [0,2pi): Tan^2x=1-secx
*Thursday, June 2, 2011 by Lsat*

**Trig**

Find all solutions of equation on interval [0,2pi] 1=cot^2x + cscx
*Thursday, June 2, 2011 by LSAT *

**trig**

1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B)=tan(A/2)ct(A/2)
*Thursday, June 2, 2011 by Kasun*

**trig**

2cos^2+sin=1
*Wednesday, June 1, 2011 by Anonymous*

**Algebra 2/ trig**

sin theta= 7/25, 0< theta < pi/2 cos beta=8/17, 0, beta, pi/2 Find(theta+ beta)
*Wednesday, June 1, 2011 by Stephanie*

**trig**

find an angle between 0 and & 2 pi that is coterminal with - 11 over 24 pi
*Tuesday, May 31, 2011 by Sage*

**Trig**

How do I prove the following Identity? sec x(sec x-cos x)=tan^2x If there is a certain website or suggestion to help with these type of equations I would greatly appreciate it. I've been studying these for a while but still get pretty confused.
*Tuesday, May 31, 2011 by Mel*

**trig**

Simplify: cos x cos x ----- + ----- sec x-1 sec x+1
*Tuesday, May 31, 2011 by Anonymous*

**trig**

verifying a solution. 4cos^2 2x-2=0
*Tuesday, May 31, 2011 by tomas*

**trig**

how much force is necessary to stop a 2500 pound car from rolling down a 40degree slope
*Monday, May 30, 2011 by Anonymous*

**trig**

If cos(t)=(-7/8) where pi<t<(3pi/2), find the values of the following trig functions. cos(2t)=? sin(2t)=? cos(t/2)=? sin(t/2)=?
*Monday, May 30, 2011 by Char*

**trig**

prove as an identity 1/1+sin(x) + 1/1-sin(x)
*Monday, May 30, 2011 by mel*

**trig**

Ok, so im brand new at trigonometry. If i have a right triangle with an acute angle of 30° an opposite side of 4 and a hypotenuse of x how do ii find x
*Monday, May 30, 2011 by maya*

**trig**

y = sin (3x-2pi)
*Monday, May 30, 2011 by mike*

**trig**

sec(90degrees -theta)
*Friday, May 27, 2011 by john*

**trig**

find the exact zeros of the function in the interval [0, 2π) 2 cot squared x + 3 csc x=0
*Friday, May 27, 2011 by shinel*

**pre cal\trig**

Find the following cot(Arccsc 25/24) show your work
*Thursday, May 26, 2011 by Cheryl*

**trig**

A plane is flying 225 mph heading South 25°West. The wind is blowing South 80°East at 60 mph. What is the bearing of the plane? What is the smallest angle of the triangle? What is the largest angle of the triangle? What is the remaining angle of the triangle? What is ...
*Thursday, May 26, 2011 by Anonymous*