
Optional mathematics
Prove that (34sin^2A) (13Tan^2A)= (3tan^2A) (4cos^2A3)
asked by Alina maharjan on July 14, 2017 
maths
Prove that (2√3+3)sinx+2√3cosx lies between (2√3+15) and (2√3+15)
asked by krishan on June 18, 2012 
advanced function
pls. help: prove the identity sin2x+sin2y=2sin(x+y)cos(xy)
asked by justme on November 29, 2011 
Math  Trig  Double Angles
Prove: cos4x = 8cos^4x  8cos^2x + 1 My Attempt: RS: = 4cos^2x (2cos^2x  1) + 1 = 4 cos^2x (cos2x) + 1 LS: = cos2(2x) = 2cos^2(2x)  1 = (cos^2(2))  cos^2(2x))  1  Prove: 8cos^4x = cos4x + 4cos2x + 3 My Attempt: RS: = cos2(2x) + 4cos(2x) + 3 =
asked by Anonymous on November 17, 2007 
Calculus
Sketch the region enclosed by the curves given below. Decide whether to integrate with respect to x or y. Then find the area of the region. y=4cos(x),y=4−8x/π. I thought it was the integral of 4cos(x) the integral of 4 8x/π on the interval 0 to π/2.
asked by Kevin on April 27, 2016 
calculus  identities
prove this identity: sec(y)  cos(y)= tan(y)sin(y) THANK YOU!!
asked by Amber on October 16, 2009 
Trigonometry
Verify Identity: cos5xcos3x=8sin^2x(2cos^3xcosx)
asked by Erik on July 2, 2011 
trig
(sec^2x1)(csc^2x1)=1 prove the following identity ive been stuck on this for hours please help
asked by Anonymous on February 22, 2013 
precalc
prove the identity : cos3x =4 cos^3x3cosx
asked by Anonymous on March 6, 2018 
precalc
use power reducing identities to prove the identity sin^4x=1/8(34cos2x+cos4x) cos^3x=(1/2cosx) (1+cos2x) thanks :)
asked by skye on August 16, 2012 
PreCalc/Math
Prove Identity: (1cos2x/ tan x) = sin2x
asked by Yadira on May 14, 2012 
Math
a) prove the identity: Ax(BXC)=B(A*C)C(A*B) A,B,C vectors x cross product *dot product b) use part a) to prove that cross product is not associative.
asked by larry on October 31, 2014 
maths
prove that cos3x+sin3x/cos xsin x=1+2sin2x
asked by sunny on July 22, 2009 
Math
Prove the identity: sec^4x  tan^4x = 1+2tan^2x
asked by Shane on November 10, 2014 
Calc III
Express the volume of the solid that the cylinder r = 4cos(theta) cuts out of the sphere of radius 4 centered at the origin with a triple integral in cylindrical coordinates. I have already found the intervals, but I cannot solve it. The bounds are
asked by Anon on November 2, 2016 
Math
Prove the identity cos3x ≡ 4cos^3x  3cosx Thank you so much for the help!
asked by Autumn on December 6, 2018 
trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x  3cosx
asked by Rin on December 13, 2011 
Pre Calculus
Prove that 2/square root 3cosxsinx=sec(pi/6x)
asked by Nathan on April 22, 2010 
Trig
prove the identity (sinX)^6 +(cosX)^6= 1  3(sinX)^2 (cosX)^2 sinX^6= sinx^2 ^3 = (1cosX^2)^3 = (12CosX^2 + cos^4) (1cosX^2) then multiply that out 12CosX^2 + cos^4  cosX^2 + 2cos^4 cos^6 add that on the left to the cos^6, and combine terms..
asked by JungJung on December 8, 2006 
Maths
Prove that cos3x/cosxcos6x/cos2x=2(cos2xcos4x)
asked by Joel on July 28, 2016 
Trig
Prove the following functions: (sinx+sin2x)/(1+cosx+cos2x)=tan x (cos3x/sinx)+(sin3x/cosx)=2cot2x tan2x=(2/cotxtanx) theses are due in the am. Fastness would be great?
asked by jared on November 7, 2011 
Algebra
Question : Determine whether each of the following given sets is a group with respect to the indicated operation. Show your work. (b) The set E of all even integers with operation addition. My work : So I was working on above part (b) Following is an
asked by Ashley on May 9, 2020 
Trigonometry
Prove it is an identity. (sin^2x)/(tanx)=sinxcosx
asked by . on April 19, 2010 
Maths
Prove that the identity element e of a group G is unique.
asked by Santosh on July 30, 2011 
Precalculus with Trigonometry
Prove or disprove the following identity: cos (x+pi/6) +sin (xpi/3) = 0
asked by Natalie on April 7, 2013 
Calculus
Prove the identity and give its domain. 4sinxcosx+sin4x=8sinxcos^3x
asked by Courtney on February 6, 2008 
trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x  3cosx
asked by Rin on December 13, 2011 
maths...
Differentiate ln [x+√(x^2+1)] with respect to x hence evaluate limit 0 to 1 ∫ 1/√(x^2+1) dx _________________________________________ Use the identity cos3x=4cos^3x3cosx, find ∫cos^3x dx * Is there a printing error in the question? the limit is
asked by Aoi on June 19, 2009 
maths
find the value of x if sin2x+3cosx=2 then cos3x+sec3x is
asked by rajagopal on September 6, 2017 
trig
how do you verify cos3x=4cos^3xcosx???
asked by lindsey edler on July 12, 2005 
math
Prove the identity: cos^4(x)sin^4(x)=12sin^2(x).with explanation im confused on this one cause of the 4th power of the sine. does this mean that we put it in the calculator 4 times? and what exactly does it mean by prove the identity does it mean like
asked by Anonymous on April 15, 2012 
precal
find all solutions in interval [0,2pi] tan²x = 3/2 secx This question may look tricky, but its actually quite simple. First: rearrange the pythagorean identity tan²x+1=sin²x so that it reads tan²x=sin²x1 Then replace the tan²x in the original
asked by ethan on May 16, 2007 
Trig
verify the following identity: 2sinxcos^3x+2sin^3cosx=sin(2x)
asked by Lynn on July 19, 2012 
trigonometry
Prove: sin3xsinx/cos3xcosx=cot2
asked by Dini on November 2, 2010 
trigpower reducing formulas
Having trouble with this problem: Rewrite the expression as an equivalent expression that does not contain powers greater than 1. Cos³x My answer: cos³x=(cos²x)(cosx) =(1+cos2x/2)(cosx)>cos+cos³x/2...which is wrong
asked by Brian on April 20, 2009 
Calculus exam review, PLEASE HELP!!
for each function, determine the equation of the tangent line to the graph for the indicated value of the variable. a) y = 3cosx + 4sinx + 1 , when x = pie b) y = x  3cosx , when x = (5pie)/3
asked by stephanie on June 21, 2012 
Math help please
Prove this identity using the producttosum identity for sine: sin^2 x=1cos(2x)/2
asked by Kyle on April 5, 2016 
Math
Prove That Cos3A = 4Cos A  3Cos A
asked by Gabriel Gad on April 23, 2019 
TRIG
Verify the following identity. 1) sin(x+y) __________ = tanx+tany cosxcosy 2) Write cos3x in terms of cosx I cannot figure out how to solve for identities they are so hard. Any help appreciated!:)
asked by ALISON on October 23, 2011 
trig
sin^4 x = (34cos 2x + cos4x)/8 prove on one side please!
asked by Rachel on February 23, 2009 
math
Prove that:(34sin^2A) (13tan^2A)=(3tan^2A)(4cos^2A3)
asked by Rishabh on October 13, 2014 
Trig
Prove (cos^2t+4cos^2+4)/(cost+2)=2sect+1)/sect
asked by Katie on March 3, 2012 
Math
Select all the true statements about identities. A) You may use proven identities to prove other identities. B) An identity is true only for restricted values of the variables. C) You can prove an identity by graphing the side to the left of the equal
asked by TeeKay on October 14, 2014 
trig
prove that the equation 2sin x cos x +4cos^2 x =1 may be written in the form of tan^2 x 2tan x 3=0
asked by Nus on January 3, 2015 
CALC
I did post it wrong. sin(4x)/sin(x)=4cos(x)cos(2x). Verify the identity, please explain!
asked by JD on August 13, 2011 
calc
sin(4x)/sin(x)=4cos(x)cos(x) verify the identity
asked by jessica on August 13, 2011 
Trigonometry
Need help solving problems using the Trigonometric Identities: 8cos^4 thet=cos4theta+4cos2theta+3 I am a bit unsure how to solve it. I am aware that the first step I must take is to simplify the problem and then use the Product to Sum formula Nasty one!
asked by sierra on April 23, 2007 
Child Development
Rachel is a highechool student who has explored several employment and education alternatives. She has chosen to attend the community college near home to become a diesel mechanic. What is the identity status of Rachel according to James Marcia? A.
asked by Jessica on May 20, 2014 
Math  Trigonometry
In order to prevent confusion that may be caused by reading this problem written through keyboard text, I have written the identity in microsoft paint here: gyazo. com/3afe07a6067e467d3776dd8b64ccac91 I need to find three different ways (Different meaning
asked by Monika on March 15, 2018 
Math  Trigonomotry
Hello! In order to prevent confusion that may be caused by reading this problem written through keyboard text, I have written the identity in microsoft paint here: gyazo. com/d4529f091e5ba75c09a9a283201504d2 I need to find three different ways (Different
asked by Monika on March 14, 2018 
algebra
Give am example of a function f.N N with the property that there exists a function g. N N such that the composition got is the identity function on N but for no function h. N N does it hold that fog is the identity function on N.Prove all claims
asked by geeta on February 27, 2014 
math
1. Prove the identity:cosx/1tanx+sinx/1cotx=sinx+cosx 2.Prove the identity: cosx/1+sinx+1+sinx/cosx=2secx
asked by Aliya on August 20, 2011 
trig
Write an equation for simple harmonic motion, given that the amplitude equals 4 inches and the period equals 2 seconds and the max displacement occurs when t=0. answers: y=4sin pi t, y=4cos pi t, y=4cos t, y=4sin2 pi t
asked by Kayla on May 17, 2012 
English
Hi I am writting an essay on a book called 'Funny Boy' I have to answer this question: Selvadurai raises questions about the nature of identity—national, familial, sexual, postcolonial, ethnic, racial—and how the suppression of one’s burgeoning or
asked by Mary on March 31, 2010 
circular (trigonometric) functions
hi, i need help solving this trigonometric equation: sinx+3cosx=0 i don't know what to do as i can't just diviide the two to create tanx which is what i have been doing in previous questions... yes, you are on the right track sinx = 3cosx sinx/cosx = 3
asked by elle on April 14, 2007 
trig
cos(sin^1 x)=sq rt(1x^2) prove the identity
asked by Emily on April 2, 2012 
PreCalculus
Prove the identity: cos(xπ/2)=sin x
asked by Adrian on November 12, 2014 
Trigonometry
Prove the identity sin(x+y+z)+sin(x+yz)+sin(xy+z)+ sin(xyz) = 4 sin(x)cos(y)cos(z) This identity is so long and after i tried to expand the left side and it just looked something crap Thanks for you help :)
asked by Tommy on July 19, 2008 
Math pre cal
prove the following identity cos^4X  sin^4X = 12sin^2X
asked by Breanna on September 28, 2009 
PreCalc !!!
Prove the identity. 2tanx/1+tan^2x=sin^2x
asked by Josh on April 16, 2012 
Math
How do you prove this identity? cos2x*tan(π\4x)= 1sin2x
asked by Branco on February 5, 2020 
math
Prove the identity (sinx+cosx)^2 = 1+sin2x Thank you
asked by Bear on January 28, 2015 
Prove trig identity
Prove the following trigonometric identity: (sec^2x1)(csc^2x1)=1
asked by Randy on January 9, 2011 
math
please help me on the following: prove the identity. cos4x = 18sin^x2cos^2x
asked by John on March 1, 2010 
trig
sinx+sinxcot^2x=cscx prove each identity
asked by tom on June 24, 2011 
MATH
prove the identity: cos(x)*csc(x)*tan(x)=1
asked by Alisa on November 6, 2014 
math
please help me on the following: prove the identity. cos4x = 18sin^x2cos^2x
asked by John on March 1, 2010 
Trigonometry
Prove the identity. 6cos^2(x)1 12cos^4(x) +8cos^6(x)= cos^3(2x) Thanks for your help :)
asked by Tommy on July 18, 2008 
Math
prove the identity: sin^2 O/ 1cos O = 1+cosO O= theta
asked by amber on April 27, 2012 
Math
Prove the identity: cosx/1tanx +sinx/1cotx
asked by Aliya on August 20, 2011 
precalc
prove the identity (1 + tan x) / sin x = csc x + sec x
asked by clarice on October 13, 2015 
PreCalculus
Prove the following to be an identity (cotx + cscx)*(1cosx)=sin x
asked by Kevin on October 15, 2017 
Calculus
prove if an identity csc (x)cot (x)=sin (x)/1+cos(x)
asked by Anonymous on October 15, 2018 
pre calc
prove identity cscx(cosx)(cotx)=sinx
asked by logan on November 29, 2010 
Math
Prove identity Cot⭕sin⭕sec⭕= 1 How would i do this one please help me. Thankyou
asked by Kristien on February 23, 2013 
Math
Required to Prove the following trig identity: (cos2x)^2 + (sin2x)^2 = 1
asked by Halle on June 18, 2009 
math trigonometry
Prove the identity Sin^3X sinx*cos^2X=tanx/cosX
asked by happy on June 9, 2015 
math trigonometry
Prove the identity Sin^3X+sinx*cos^2X=tanx/cosX
asked by happy on June 9, 2015 
trig
Prove the identity. (must work with left side) (12sin(x)^2)=(cos(x)^2)
asked by mailon on September 4, 2008 
math
prove the following trigonometric identity: (cos x/(1+sinx))+tanx = secx
asked by Liz on March 12, 2008 
PreCalc/Math
Prove identity: (sec x/csc x) + (sin x/cos x)=(2/cot x)
asked by Yadira on May 14, 2012 
math
sinx+ siny/ (cosx+cosy)= tan 1/2 (x+y) prove this identity
asked by JK on August 13, 2010 
math
prove the identity cos x/sec xtan x=1plus sin x
asked by laston on December 13, 2016 
gr 12. advanced functions
Trig identity Prove: cos2x tan(pie/4  x)  = 1 + sin2x
asked by avm on November 21, 2009 
Math
Prove the identity csc^2x = 2sec2x / sec2x  1 Sorry i really tried. I got : LS = 1  (cos^2x/sin^2x) but that's it. please help
asked by Nihira on June 17, 2014 
maths
If f(x)=x(2pix) in 0
asked by Rahul on September 9, 2012 
Math
Prove this identity. State any restrictions on the variables. sin x/(tan x)= cos x
asked by Emily on December 9, 2010 
Math (PreCalculus)
How do I prove the following identity? sec^2x1 (division line)>  = (tanx)(secx) (sinx)
asked by Charli on February 3, 2015 
Math (precelc 12)
I need to prove this identity: cot(x)+tan(x)=csc(x)sec(x) I get as adding them together, but then I get stuck.
asked by Jana on June 17, 2016 
Precalculus
23cosx=5+3cosx 0 degrees is less than or equal to x less than or equal to 180 degrees Can you please show me step by step in detail. Please do not skip a step. Thanks!
asked by Jess on August 6, 2011 
Trigonometry
For all values of x for which the expressions are defined, prove the following equation identity 2/sec = 22 sin^2 x/ cos x
asked by Anna on March 17, 2016 
precalculus
Sin(x+y)cos(xy)= 1/2sin2x+ 1/2 sin2y Help please I have no idea how to do this because my math class never did it but while making the final review for the chapter I was assigned, I put this one in it. They are going to all ask me how to do it.
asked by Dustin on January 15, 2015 
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^2xtan^2x= cos x
asked by May on January 11, 2010 
ah trig help
use an apropriate sum or difference indentity to prove the doubleangle identity cos2u=12sin2u
asked by amber on April 26, 2011 
trig
determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a
asked by Anonymous on March 20, 2011 
Math
Prove the identities 1. cos3Ɵ + cos Ɵ = 4cos^Ɵ  2 cos Ɵ 2. sin (A+B)sin (AB)=cos2B + sin^2 A1
asked by Anonymous on October 25, 2012 
Physics
Given below are the some of the function of x and t to represent the displacement (transverse or longitudnal ) of an elastic wave . State whether it is stationary or travelling wave or none of them. (i) y = 3sin(5x+0.5t) + 4cos(5x+0.5t) (ii) y =
asked by Raj on December 2, 2016 
Pre Cal
could someone please tell me what the other angle identity of tan is? Thank you much! "...other angle identity of tan x"? in relation to which "other" ? there are many identities dealing with the tangent. The most important is probably tan x = sin x/cos x
asked by Marie on May 23, 2007 
MathS triG
1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0
asked by OwamIII on April 8, 2014 
maths Pls help trig
1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0
asked by tshepo on April 8, 2014