Saturday

November 28, 2015
Number of results: 3,534

**precalc**

Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
*December 5, 2011 by Joshua*

**calculus**

1. what trig function has an amplitue of 1 and negative values for angles between π/2 and π? 2. what trig function never crosses the x-axis and has a value of 2 at π/6? are these correct? 3. what trig function has a period of π and is undefined for -π/...
*September 28, 2015 by anon*

**math**

could someone please refresh my memory of the basic trig functions? ex) cos^2 + sin^2 = 1? That is a trig identity. http://www.sosmath.com/trig/Trig5/trig5/trig5.html
*April 12, 2007 by raychael*

**trig**

What kind of reflections are the following trig functions? y = 3cos(x-1) y = sin(-3x+3) y = -2sin(x)-4
*April 21, 2008 by Joshua*

**trig**

What is the shift along x of the following trig functions? y = (3sinx/2) + 4 y = -2sin(x)-4 y = sin(-3x + 3)
*April 21, 2008 by Amandeep*

**trig**

express the trig. ratios sinA,secA n tanA in terms of cotA.
*May 7, 2011 by Anonymous*

**trig**

How do you solve cos(2arcsin 1/4) using inverse trig. functions??!! PLEASE HELP ME!
*May 9, 2011 by Tor*

**Trig**

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

**trig**

What kind of reflection does the trig function y = cos(4x/3 minus 1) have?
*April 21, 2008 by Priya*

**trig**

What kind of reflection does the trig function y = cos(4x/3 minus 1) have?
*April 22, 2008 by Chaitanya*

**trig**

how do i do this? give the signs of the six trig functions for each angle: 74 degrees?
*December 3, 2008 by Tay*

**trig**

simplify to a constant or basic trig function.. 1+tan(x)/1+cot(x)
*March 14, 2010 by hilde*

**trig**

find the 5 trig ratios when sin theta = -5/13 and lies in quadrant 3
*September 14, 2011 by karen*

**trig**

use the unit circle to find the exact value for all the trig functions of è=2ð/3.
*February 1, 2010 by Anonymous*

**Precalculus**

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

**Trig**

find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?
*September 1, 2011 by ALISON*

**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
*January 19, 2012 by Claire*

**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
*January 19, 2012 by Claire*

**Trig**

Does anybody know a good website that will hlp me with finding the six trig functions of a point NOT on the unit cricle?
*September 16, 2009 by Anonymous*

**trig**

find the 5 other trig functions if cos(theta) = square root of 2/2 and cotangent is less than 0
*June 9, 2010 by kelly*

**trig**

if (-12,5) is a pointon the terminal side of an angel 0 find the exact value of six trig funcation of 0
*June 19, 2014 by sal*

**trig**

what is the exact value of 7pi for all trig func.?
*February 1, 2010 by claire*

**Trig**

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

**trig**

write a product of two trig functions that equals 1.
*November 6, 2011 by Dani*

**Trig**

Solve the following trig equation 2cos(x-π/6)=1
*January 31, 2012 by Matt*

**Trig **

csc thea= -2, quadrant 4. what are the six trig functions?
*May 6, 2013 by Shay*

**trig**

TRIG Identities, Gr. 12: Prove: cot4x=1-tan^2x/2tan2x
*May 23, 2013 by Josh*

**trig**

What is the shift along x of the trig function y = cos(4x/3 minus 1)? Any link of proof would be appreciated if you have one Thank you
*April 21, 2008 by Priya*

**trig**

What is the shift along y of the trig function y = cos(4x/3 minus 1)? Any link of proof would be appreciated if you have one Thank you
*April 21, 2008 by Priya*

**trig**

Let Q be an acute angle such that sinQ=.6. Find the values of the following using Trig Identities: cosQ and tanQ
*July 27, 2010 by student*

**Trig**

Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation
*March 1, 2011 by Anonymus*

**trig**

how to i find the six trig values for (7pi/3)
*January 12, 2010 by Rak*

**trig**

what's the single trig. function of cos6xcosx-sin6xsinx
*May 17, 2012 by MIK*

**trig**

Suppose that q is in standard position and the given point is on the terminal side of q. Give the exact value of the indicated trig function for q.
*February 21, 2011 by Anonymous*

**Trig**

The next two steps in solving this trig identity question are ??? 1/csctheta x costheta x sintheta x sectheta = sinsqtheta arghhh need help please
*December 17, 2011 by Don*

**trig**

What is the range of the trig function sin(-3x+3)?
*April 21, 2008 by Chaitanya*

**Trig**

Trig Identity. 1-sin^2x/1-cosx
*May 15, 2011 by Jill*

**trig**

write 2+2 squareroot of 3i in trig form.
*May 17, 2012 by ky*

**trig 26**

simplify to a constant or trig func. 1. sec ²u-tan ²u/cos ²v+sin ²v change expression to only sines and cosines. then to a basic trig function. 2. sin(theta) - tan(theta)*cos(theta)+ cos(pi/2 - theta) 3. (sec y - tan y)(sec y + tan y)/ sec y combine fractions and simplify to a...
*March 14, 2010 by hilde*

**Math- gr.12 Trig. **

Hi, could someone explain to me how to use a counterexample in trig to prove whether something is either an identity or equation? For ex. how would you do that with this question? sec^2x-tan^2x= cos x
*January 11, 2010 by May*

**trig**

Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
*December 11, 2011 by Josh*

**Trigonometry**

Use the trig Identities to find the other 5 trig functions. Problem 7.)Tan(90-x)=-3/8 8.)Csc x=-13/5 9.)Cot x=square root of 3 10.)Sin(90-x)=-.4563 11.)Sec(-x)=4 12.)Cos x=-.2351 I need HELP!
*January 5, 2010 by Jennifer*

**trig**

I am currently taking a trig class. I need help understanding how to solve for sin,cos, and tan in problems which give an angle and a side length or the hypotenus. Any help would be muchly appreciated
*February 11, 2015 by Ben*

**trig**

combine fractions and simplify to a multiple of a power of a basic trig. function.? sin x/cot²x - sin x/cos²x
*March 15, 2010 by hilde*

**trig**

I have heard that trig CAN be super easy, that there are just, like, 10 rules you need to memorize then all the problems are easy. ... Does anyone know what these are? Thanks!
*April 7, 2008 by jennifer*

**Trig**

Im having serious issues with verifying Trig. identities. Please help! Here is an example: (tanX-secX)^2= 1-sinX/1+sinX
*November 7, 2011 by Rachel*

**trig**

Solving Trig Functions: How Do You Solve For Sin 7.5 Using Half-Angle and Double-Angle Identities?
*September 22, 2010 by Spy[c]*

**Trig**

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

**trig**

If cos 0 = - 1/2 and tan 0 > 0, find the quadrant that contains the terminal side of 0, and then find the exact values of the other five trig functions of 0.
*May 14, 2011 by shawn*

**trig**

find the exact values of the six trig functions of theta equals six pi divided by 8
*October 17, 2011 by don*

**trig**

2sin(4x)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x can someone simplify this using trig identities?
*May 13, 2012 by Brianna*

**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)
*January 26, 2012 by Anonymous*

**algebra/trig**

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

**Trig**

HELP!!!! I dont know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x
*March 8, 2012 by Quetzally*

**trig**

hi, I have a placement test coming up tomorrow, and I'm pretty confident about all the stuff that's going to be there except trigonometry. I took trig two years back and I understood it very well. But now it's been so long and I can't even remember the basics. Is there any ...
*June 1, 2010 by y912f*

**trig**

Find the exact values of the other trig functions of theta given sec theta=7 and sin theta is less than 0.
*May 8, 2011 by Nick*

**trig**

Prove the following trig identity: 1 + sinx = sinx(1+cscx)
*November 4, 2009 by Anonymous*

**trig**

how do i find six trig functions for cos(pi over 2-x)=3/5, cos x=4/5?
*October 19, 2010 by Anonymous*

**trig**

how to graph thr trig function f(x)3x-180)+2 and the parent function?
*January 7, 2013 by kim*

**graphing trig functions**

for graphing basic trig functions such as y=2sinx or y=1/3cosx, how do you know what the points are to graph with out using a calculator?
*May 18, 2012 by bkue*

**Trig**

Prove the trig identity cos(4x)=2-sec^2(2x)/sec^2(2x)
*April 13, 2010 by leo*

**Trig**

Prove the trig identity cos(4x)=2-sec^2(2x)/sec^2(2x)
*April 14, 2010 by kristina*

**trig**

prove the trig identity cos(4x) = 2-sec^2(2x)/sec^2(2x)
*April 14, 2010 by kevin*

**trig**

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

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to get the answer.
*September 5, 2011 by Charles*

**Trig**

How do i set this trig problem up? PLEASE help me. Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = -1/2, with t in quadrant 4.
*May 3, 2010 by Dave*

**Math - Trig**

Hi I have a Trig question that i dont understand, can someone please explain how to solve for it using cosine law?? A Clock with a radius of 15 cm has an 11 cm minute hand and a 7 cm hour hand. How far apart, to the nearest centimetre, are the tips of the hands at each time? a...
*April 30, 2008 by Mark*

**Trig**

A ramp 38' long rises to a platform. The bottom of the platform is 20' from the foot of the ramp. Find x , the angle of elevation of the ramp. Round your answer to the nearest hundredth of a degree. After this question I'm done with TRIG!!! Thanks
*May 15, 2011 by Rachal*

**trig**

how would you verify this trig identity (1+cos(x) / 1-cos(x)) - (1-cos(x) / 1+cos(x)) = 4cot(x)csc(x) ? help please!
*June 25, 2008 by amanda*

**trig**

please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1- tan 25° tan 5°
*April 30, 2010 by ann*

**trig**

please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1- tan 25° tan 5°
*April 30, 2010 by ann*

**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
*June 7, 2011 by jacara*

**trig**

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) Sec^-1(-sqrt2) Tan^-1(-sqrt3) Tan^-1(sqrt3)
*September 3, 2011 by Anonymous*

**trig**

find each value by referring to the graphs of the trig functions. 1. sec 4 pi...i got 0 Find the values for theta for which each equation is true. csc (theta)=1 i got pi over 2 +2 pi n
*October 26, 2008 by gaby*

**Trig/Pre-Calc**

Need help with current Trig problem for tomorrow: Solve the logarithmic equation algebraically. Approximate the result to three decimal places. 6log3(0.5x)=11 I know to start off the equation you divide by 6. I know the answer is 14.988. I just am puzzled on how to receive the...
*May 16, 2011 by Eric*

**math (final trig problem)**

Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig questions?? how about ...
*April 30, 2007 by jacob*

**trig**

How do I prove these trig identities? secx-cosx/tanx =sinx And 1+sinx/cosx+ cox/ 1+sinx=2secx
*May 15, 2011 by Jill*

**trig**

let P be a point in Q1 such that the slope of the line connecting P to the origin is sq. root of 2 and the distance from P to the origin is 3 units. Find the coordinates of P, state all trig values for angle formed by the line and the positive x-axis, and the measure of said ...
*October 25, 2011 by Chelci*

**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)=?
*May 30, 2011 by Char*

**Math/Trig**

How would I evaluate these trig functions without using a calculator? U: sin(-13π/6) cot 11π/6 cot(-14π/4) sec 23π/6 Thanks in advance ^^; and if you'd tell me step by step on how to do problems like these I'd be grateful :D
*June 11, 2012 by Leah*

**trig 30**

For csc^2 A-1/cot A csc A, what is the simplest equivalent trig expression? The answers I have to choose from are sin A, cosA, tan A or csc A, but I don't know how?? csc theta= 1/sin theta but its ^2. Help please I don't even no where to begin
*March 10, 2010 by Tye*

**trig**

Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function. Sec^-1(-2) sec^-1(-sqrt2) Cos^-1((-sqrt3)/2) Tan^-1(-sqrt3) Could someone explain how to get the answer as well please.
*September 3, 2011 by Anonymous*

**Trig**

Solve the trig equation exactly over the indicated interval. tanθ = 0, all real numbers I know the answer is πn, but I don't understand how they got this. I get that tanθ = 0 on π and 2π on the unit circle, so did they just put n on the end of π ...
*April 7, 2013 by Anne*

**Trig**

Can you please help with this trig question: The angle of elevation to the top of a nearby mountain is 46 degrees. After walking 1 km toward the mountain, you determine the angle of elevation to be 68 degrees. How high is the mountain? Thank you for all your help.
*April 20, 2015 by Cassandra*

**trig**

if 10 students enter projects in the art show, how many different ways can they come in 1st, 2nd, and 3rd place? would you go 10^3 OR 10TIMES 3? This is not a trig question. Neither of those answers is correct. After making one of ten possible choices for first place, there ...
*January 18, 2007 by Dom*

**trig **

1st-the reason i keep change my name because some of my friends are using my computer by their own name to asked questions. we are having a hard time solving each trig problems 2nd- if sin theta=0.6 and 90 degree <theta < 180 degree, find the exact value of sin 2 theta. ...
*May 8, 2011 by minh *

**TRIG**

Half angles in trig (square root(1-square root(21)/5)/2)
*April 22, 2014 by Renee ( PLEASE HELP ME)*

**Trigonometry**

Hi, I need help with this question: Use the addition and subtraction formulas ti fubd the exact values of the trigonometric ratios: cos(-7pi/12) Okay, I'm just having trouble with a rather basic part of the question... I wrote cos(pi/4 + pi/3), but now I realized that the trig...
*December 7, 2008 by Lucy X*

**trig**

find the exact values of the six trig functions of the angle. -750 sin(-750)= cos(-750)= tan(-750)= csc(-750)= sec(-750)= cot(-750)= I've tried this question over and over again and i cannot get it right. i believe -750 is in the fourth quadrant but I'm not sure. can someone ...
*September 6, 2011 by ALISON*

**trig**

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s= 2 sin pi t + 3 cos pi t, where t is measured in seconds. (a) Find the average velocity during each time period: (i)[1,2] (ii) [1,1.1] (iii) [1, 1....
*September 23, 2008 by Sarah*

**Math-Trig**

Trig Questions- 1. Write the algebraic expression which shows Cos((ArcSin(4/X)), 2. Angle If Csc(-Θ)=15/4? 2. - what quadrant is it in, find the sin(-Θ), Sin(Θ), Tan(90deg-Θ), Tan(Θ), csc(Θ), Sec(-Θ+360deg), Thanks
*March 15, 2009 by Ram*

**math/trig**

A ship sailed on a bearing 140 degrees. It was then 90 km south of its orignal position. a) draw a diagram to show the ship's journey b) how far east of its original position is it? what ratio would i need? (sine,cosine or tangent) i know that all trig questions have a right-...
*November 26, 2009 by philippa*

**Physics**

he graph of the velocity of a mass attached to a horizontal spring on a horizontal frictionless surface as a function of time is shown below. The numerical value of V is 5.48 m/s, and the numerical value of t0 is 8.97 s. a) What is the amplitude of the motion in m? b) What is ...
*November 20, 2012 by Jalopy*

**trig**

prove the following trig identity: a) sin(pi/6 + x) + sin (pi/3 + x) + sin (pi/2 + x) = ((sqrt3) +1)/2 (sinx +(sqrt3)cosx) b) sin(pi/4 + x) + sin(pi/4 - 4)= (sqrt2)cosx
*May 3, 2009 by Anonymous*

**Trig**

Column 1 Column 2 (sin theta + cos theta)sq 1 + 2sin theta cos theta Question : how do you get column 1 to be the same as column 2?? using the trig identities
*December 17, 2011 by Don*

**math (trig)**

i have some problems doing trig the first one is: Show that cos(x/2) sin(3x/2) = ½(sinx + sin2x) i know that you are supposed to substitute all those trig function things in it but i kind of forgot how to the only that i can see substituting in is the double angle one for ...
*April 30, 2007 by jacob*

**TRIG!**

Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6 x=1 - (3/4)sin^2 2x work on one side only! Responses Trig please help! - Reiny, Monday, February 23, 2009 at 4:27pm LS looks like the sum of cubes sin^6 x + cos^6 x = (sin^2x)^3 + (cos^2x)^3 = (sin^2x+cos...
*February 23, 2009 by hayden*

**Solving Trig equation**

Solve the trig equation exactly in the interval 0≤x≤2π. tan x + tan π/3 ------------------ = square root 3 1 - tan x tan π/3
*April 27, 2012 by Anonymous*

**Trigonometry/Geometry - Inequalities**

Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This looks like a geometry...
*December 7, 2013 by Sam*

**calculus**

Integrate x/(x^2 + 4) dx via trig substitution and by u=x^2+4 substitution. Show that results are equal. Via trig substitution of x=2 *tan t, I get: 1/2 * tan^-1 (x/2) + c Via u = (x^2 + 4) substitution, I get: 1/2 * ln |x^2 + 4| + c How are these equal?
*December 31, 2007 by mathstudent*