# find d/dx (integral from 2 to x^4) tan(x^2) dx tan(x^4)^2*4x^3 MY ANSWER

139,202 results, page 4-
## Calculus 12th grade (double check my work please)

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)

*asked by anon on March 7, 2011* -
## Calculus PLEASE check my work ,

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)

*asked by anon on March 12, 2011* -
## math

use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I have found)and the symmetry of the graphs of sin,cos and tan to find the exact values of sin(-pi/6), cos(5pi/3) and tan (4pi/3). I know that sin -(pi/6) = -1/2 and cos (5pi/30 = 1/2 and

*asked by jenny on August 24, 2011* -
## maths

if tan^2x=1-e^2, prove that secx+tan^3x cosecx = (2-e^2)^3/2

*asked by krishan on June 18, 2012* -
## math

If Tan (A+B)=1/3 and Tan(A-B)=2/5,then prove that A.Tan2A=11/13 B.Tan2B=-1/17

*asked by Gunda on May 8, 2017* -
## trignometry

show that cos2x=1-tan^ 2 x /1+tan^2x=2cos^2x-1

*asked by help me out it's urgent on October 6, 2012* -
## Math

Help prove this identitiy tan(pi/4+x)+tan(pi/4-x)=2sec2x

*asked by Gifty on January 4, 2009* -
## Trig

True or false? tan x = tan(x-6pi)

*asked by Jay on January 24, 2013* -
## precal

Why is there no corresponding point on tan^-1(x) for the (135,-1) on the graph tan(x). Thanks!

*asked by jen on January 7, 2011* -
## Pre Calculus

Verify the following identity 2 tan x/1+tan^2 x = sin 2x

*asked by Joe on April 12, 2010* -
## maths

If the roots of the quadratic eqn x²+px+q=0 are tan 30° and tan 15° respectively, then the value of 2+q-p is-

*asked by jha on July 5, 2014* -
## trignometry

1. if sin 2A = Psin2B, prove that tan(A+B)/tan(A-B)=P+1/P-1.

*asked by seema on June 13, 2011* -
## Maths

If Tan (A+B)=1/3 and Tan(A-B)=2/5,then prove that A.Tan2A=11/13 B.Tan2B=-1/17

*asked by Rabinprakash Dahal on September 1, 2015* -
## Math

trigonometric identities tan^2Ө/sin^2Ө-1=tan^2Ө

*asked by Melissa on May 27, 2015* -
## Trig Proofs

Please solve this proof Tan(pi/4 +x)+ Tan(pi/4+x)= 2Sec2x

*asked by Kim on April 28, 2009* -
## math

Prove that Sin x + tan x / 1+cosx =tan x

*asked by lindsay on May 19, 2013* -
## agl 2

rewrite: tan 4 X + tan 2 X/ 1 - (tan4X)(tan2X)

*asked by jan on June 26, 2012* -
## trig

1. if sin 2A = Psin2B, prove that tan(A+B)/tan(A-B)=P+1/P-1.

*asked by seema on June 14, 2011* -
## basic maths trignometry

prove that secx - tanx = 1 -tan x/2 /1 + tan x/2

*asked by kabir on July 28, 2016* -
## TC

If Tan (A+B)=1/3 and Tan(A-B)=2/5,then prove that A.Tan2A=11/13 B.Tan2B=-1/17

*asked by Rabinprakash Dahal on September 1, 2015* -
## Trigonometry

Verify the identity algebraically. TAN X + COT Y/TAN X COT Y= TAN Y + COT X

*asked by AwesomeGuy on February 17, 2013* -
## Trigonometry

Verify the identities please. 1.) TAN(X+π)-TAN(π-X)= 2 TAN X 2.) SIN(X+Y)+SIN(X-Y)= 2 SIN X COS Y

*asked by AwesomeGuy on February 22, 2013* -
## Physics

so I'm doing the back of this worksheet and on the bottom there's a list of a whole bunch of formulas... I'm asked to find the minimum coefficent of friction if the road was flat of a car which I still don't know how to do and posted a question about it

*asked by HELP ME! on May 11, 2009* -
## calculus

find functions f(x) and g(x) so that f(g(x))= sqrt(tan(3x^2 - 7)) Would this work??? g(x)= 3x^2 -7 f(x)= sqrt(tan(x))

*asked by Blake on October 12, 2010* -
## Pre-Calculus

Given cos A = -3/5, π

*asked by Anonymous on October 25, 2018* -
## Calculus

How do I calculate the following? tan−1(tan(8)) − tan−1(tan(4))

*asked by Anonymous on October 18, 2015* -
## Calc

how do i begin to solve this? integral of (1/x^2)sec(1/x)tan91/x)dx I tried substituting tan(1/x) for u but i couldn't get it to work...

*asked by Katie on February 28, 2010* -
## Trig

4tan^2u-1=tan^2u 3tan^2u=1 tan^2u=1/3 sq. root of (tan^2u)=sq. root of (1/3) tanu=sq. root of (3)/3 tanu=sq. root of 1 Did I do this one right? If not, could you please show me the correct method?? Thanks!

*asked by Tara on January 9, 2010* -
## trigonometry help me

6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y 10.Prove that 1+tanθ/1-tanθ = sec^2θ+2tanθ/1-tan^2θ 17.Prove that sin^2w-cos^2w/tan w sin w + cos w tan w = cos w-cot w cos w 23.Find a counterexample to shows that the equation sec a – cos

*asked by eddy on January 2, 2013* -
## trignonmetry

6. Prove that tan λ cos^2 λ + sin^2λ/sin λ = cos λ + sin λ 10. Prove that 1+tanθ/1-tanθ = sec^2θ+2tanθ/1-tan^2θ 17.Prove that sin^2w-cos^2w/tan w sin w + cos w tan w = cos w-cot w cos w 23. Find a counterexample to shows that the equation sec

*asked by yoshi on December 16, 2012* -
## Pre-Cal

Find sin 2x, cos 2x, and tan 2x from the given information. [1]. sin x = 8/17, x in Quadrant I 1). sin 2x =________. 2). cos 2x =________. 3). tan 2x =________. [2]. sin x = -5/13, x in Quadrant III 1). sin 2x =________. 2). cos 2x =________. 3). tan 2x

*asked by Amber on July 8, 2016* -
## spanish

please check these questions: En la clase de español, los estudiantes van a escribir una _____." a. capítulo b. ejercicio c. composición d. informe D "¿Tomaste la prueba y el examen?" "Sí, _____ tomé." a. lo b. la c. los d. las (i need help on this

*asked by spanish on April 24, 2009* -
## math help

What is the distance Y Z in metres between the boat and the bouy, to 2 significant figures? A surveyor, standing at an observation point on a cliff top of a height 300m above sea level, can see a boat and a bouy out at sea, both directly in front of him.

*asked by claudia on May 18, 2007* -
## physics

In Physics, it is important to use mathemat- ical approximations. For instance, in a small angle approximation, tan α ∼ sin α . Find the largest angle α for which the dif- ference of sin α − tan α is less than 3.52% of the sin α value.

*asked by ryan on June 28, 2011* -
## math

prove cos(x+y) / cos(x-y) = (1-tan x tan y)/(1+tan x tan y)

*asked by Yuni on December 10, 2011* -
## Maths

Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic equation. State the quadrants in which each angle lie. 8 tan^2 theta + 2 tan theta=15

*asked by Shane on May 6, 2013* -
## Maths

Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic equation. State the quadrants in which each angle lie. 8 tan^2 theta + 2 tan theta=15

*asked by Shane on May 6, 2013* -
## Please help me with Trig

Given cos 67.5° = [√(2+√2)]/2, find tan 67.5° , simplify where needed, and show work. I'm starting to learn this stuff, and I'm so confused where to start. I know they gave me the coordinate X as in cos 67.5° = [√(2+√2)]/2, and I also know that

*asked by Jane on January 27, 2016* -
## maths

Q)If sin x=12/13 then find the value of the following in fraction: 1)3 tan x - cos x 2)5 sin x - 4 tan x 3)2 sin x - cos x + tan x

*asked by humza on March 5, 2017* -
## math

Could someone please help me answer this Prove tan(-theta) = -tan(theta)

*asked by Seven on August 7, 2010* -
## Radicals and Trig.

I am catching up over summer on math units that I have to rewrite. In my textbook it asks me to find the base of two triangles and add them together. the smallest angle of the larger triangle is 30 degrees. The opposite side to the angle is 40cm. it gives

*asked by SummerHomework on July 25, 2012* -
## precalc

Given that sec 3π/10 ≈ 17/10 and csc 3π/10 ≈ 17/14, find the following: 1. sin 3π/10 ≈ 14/17 (is this one correct) 2. csc 43π/10 ≈ 3. sec 2π/10 ≈ 4. cot -12π/10 ≈ 5. tan π/5 ≈ 6. sin -7π/10 ≈ 7. cos 13π/10 ≈ 8. tan -33π/10 ≈ i

*asked by a on September 17, 2015* -
## maths

Please I need help.Show full working out. (a) sin x cot x= cos x (b) (1 + tan theta)^2 + (1- tan theta)^2 = 2sec^2theta

*asked by Shane on May 6, 2013* -
## Trigonometry

How do you verify the equation is an identity? Tan^2x-tan^2y=sec^2x-sec^2y and, how do you factor and simplify, cscx(sin^2x+cos^2xtanx)/sinx+cosx

*asked by Jasmine on January 3, 2010* -
## Math

prove sin2x+cos2x+1 tan(pi/4+x) ______________ = __________ sin2x+cos2x-1 tanx so what I did tan(x) (1+cos(2x)+sin(2x)=tan(pi/4+x) (-1+cos(2x)+sin(2x)

*asked by Lana on November 27, 2015* -
## math

Using taylor series solve lim x→0 ((sin^-1 6x)-(sin 6x))/((tan^-1)(6x)-(tan 6x) I don't know how to start this problem

*asked by johnson on November 24, 2015* -
## trig

Prove that tan4x=(4tanx-tan^3x)/(1-6tan^2 x+tan^4 x) *note: the exponents are just numbers. there are no variables in the exponents.

*asked by Anne on March 27, 2010* -
## Math

tan 39°=40/AP, So AP =40/tan. in triangle AQP, angle Q= 60/sin 91°=AP/SinQ. Then bearing of Qfrom P = 30° 180°-(91 angle Q).

*asked by Vin Mwale on February 13, 2018* -
## trig

Solve the following equation for È

*asked by Anonymous on December 19, 2011* -
## pre-calc

(1+tan x)^2= 2 tan x+2 please show all work

*asked by Haley on November 20, 2012* -
## fundamental trigonometric indentities

tan^2x-sin^2x=tan^2xsin^2x

*asked by Anonymous on February 11, 2011* -
## Math

Verify: tan^2a=sec^2a tan^2a-1

*asked by Anonymous on May 5, 2017* -
## math

Prove: 2cos^2(x)-1 = 1-tan^2(x)/ 1+tan^2(x) Thank you!

*asked by Beatriz on January 4, 2010* -
## maths (trigonometry)

if sec x +tan x=p, then tan xeuqalto what. How?

*asked by marley on June 8, 2011* -
## math

prove that tan(π/4+x/2)+tan(π/4-x/2)=2sec x

*asked by abcd on October 8, 2016* -
## math

The maker of a candy that comes in the color Blue, Red, White, Green, Pink and Tan. The proportion for Blue is 0.2, Red is 0.3, White is 0.1, Green is 0.2, Pink is 0.1 and Tan is 0.1. A single candy is drawn at random. Find the probability that a candy has

*asked by Ana wheeler on October 19, 2012* -
## solving trigonometrical equations

arctan(tan(2pi/3) thanks. arctan(tan(2pi/3) = -pi/3 since arctan and tan are inverse operations, the solution would be 2pi/3 the number of solutions to arctan(x) is infinite, look at its graph. generally, unless a general solution is asked for, or a domain

*asked by Jen on April 10, 2007* -
## Basic math

if tan alpha =1/3 and tan beta =1/7 prove that tan(2 alpha+beta)=45 degrees

*asked by Anonymous on January 22, 2017* -
## math

how do I simplify these? 1. (Cot/1-tan) + (Tan/1-Cot) - Tan - Cot 2. (1+cos) (csc-cot)

*asked by kayla on February 10, 2009* -
## Trigonometry

how do i evaluate this? 1+tan 200(degrees) tan 80(degrees)/tan200(degrees)-tan 80(degrees)

*asked by Liv on October 15, 2016* -
## Trig.......

I need to prove that the following is true. Thanks (2tanx /1-tan^x)+(1/2cos^2x-1)= (cosx+sinx)/(cosx - sinx) and thanks ........... check your typing. I tried 30º, the two sides are not equal, they differ by 1 oh , thank you Mr Reiny I'll tell my teacher

*asked by abdo on April 18, 2007* -
## Precalculus

Prove that the left side equals the right side Tan + sec -1 / tan -sec + 1 = tan + sec

*asked by Anonymous on April 18, 2014* -
## verifying identities

how do you veriy tan x + Cot y -------------- = tan y + cot x 1-tan x cot y sin^4x + cos^4x = 1- 2cos^2x + 2cos^4

*asked by Dizzytrig on July 22, 2008* -
## maths-trignometry

Prove that tan-1 (1/7) + tan-1 (1/13) = tan-1(2/9)

*asked by anoynomous on March 16, 2013* -
## Maths

Find tan(3 theta) in terms of tan theta

*asked by Jake on February 12, 2007* -
## calculator question.. please answer ASAP

how do i type in tan^2 or cos^2 on the calculator?.. everyime i press tan or cos, parentheses automatically come up with it

*asked by Anonymous on March 6, 2008* -
## mathematics

evaluate each of the following..sin 130.tan 60/cos 540.tan 230.sin 400

*asked by Jossie on March 21, 2013* -
## trig

give the exact real number value without using a calculator sin[(cos^-1)(1/4)] sin[(tan^-1)(3/4)+(tan^-1)(12/5)]

*asked by billy on April 14, 2008* -
## trigonometry...........

Prove the following identity:- (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx

*asked by MATHS on June 11, 2011* -
## English

What point is Tan making with the example of her mother and the hospital in Mother Tongue by Amy Tan 1990?

*asked by Nick on January 29, 2013* -
## trig

Solve the equation 2 tan C - 3 = 3 tan C-4 algebraically for all values of C in the interval 0 degrees

*asked by Anonymous on February 8, 2012* -
## math

Another: theta is a second quadrant angle in standard position and tan theta = - (sqrt5)/(2) . Find the exact value of cos theta. I assume I use the equation 1 / cos(theta)^2 = 1 + tan (theta)^2 However how does this work out algebraically?

*asked by Adam on March 31, 2013* -
## math

The point (5,-6) is on the terminal arm of the standard position angleӨ. Determine the smallest positive measure of Ө in radians. It's in the fourth quadrant so tan is negative? tan(-6/5) how can that be positive? Thanks in advance.

*asked by sh on June 17, 2009* -
## spanish

i need help on this: "Rebeca dice que no tiene que estudiar para el examen." "Yo, sí. No soy _____ ella." a. tan alta como b. tan inteligente como c. mayor que d. más deportista que thanks!

*asked by spanish on April 24, 2009* -
## English

How does setting contribute to emotional effect in "Two Kinds" by Amy Tan? For this, I wrote that the setting of Chinatown is reminiscent of China and the pain and squalor that Jing-Mei's mother escaped from. Is this correct? I also need some more details

*asked by student on September 18, 2017* -
## Calculus

How do I find the critical values? y= 4/x + tan(πx/8) What I did is I simplified it to y= 4x^-1 + tan(πx/8) then I took the derivative y'= -4x^-2 + (π/8)(sec(πx/8))^2 Then I simplied it y'= -4/x^2 + (π/8)(sec(πx/8))^2 then I found a common denomiator

*asked by John on September 25, 2013* -
## Physics

An item is shot off the ground at a force of 31N and an angle of 36 degrees. In order to find the vertical force, would I use SIN, COSINE, or TANGENT? would it go 31 * COS/SIN/TAN (36) or 36 * COS/SIN/TAN (31)??

*asked by Sarah on March 13, 2010* -
## math

cot^-1(2tan(cos^-18/17))+tan^-1(2tan(sin^-18/17))=tan^-1300/161

*asked by hasee on April 4, 2013* -
## Math

tan 46.27 = x / (y+100) could someone change this to y = ? I tried it but got stuck after the first step of moving y+100 over to tan... steps too please

*asked by Amy~ on May 15, 2011* -
## Math

Simplify the follow)ing to the simplest form (tan(x) +cot(x))/ (tan(x)*cot(x))

*asked by Sandra on January 29, 2017* -
## math

prove (tan^3x/1 tan^2x) (cot^3x/1 cot^2) = (1-2sin^2x cos^2x)/sinx cosx

*asked by pankaj on October 5, 2017* -
## calculus

Evaluate the limit as x approaches 0 of [tan(x+Δx)-tan(x)] /Δx: sec^ 2 (x) cot (x) sec (x) does not exist

*asked by ashley on February 6, 2014* -
## Precalculus Follow Up

1+ cos(theta)/Cos(theta) = tan^2(theta)/sec(theta)-1 I am having trouble understanding how this is verified by the previous answer. I am sorry I just want to understand this because I didn't see a tan^2 anywhere :/. Step by step how did you verify the

*asked by George on October 29, 2012* -
## Precalculus

Solve for the equation in the given domain. (tan theta)(sec theta)=tan theta theta E{real numbers of degrees} BY THE WAY, REMIND ME IF THIS IS THE CORRECT WAY TO FIND THE ANGLE OF... sec theta=2 To find the angle do you set it up like this?? 1/(cos^-1)(2)

*asked by Anonymous on November 18, 2013* -
## science-physics

You walk 15 m south and 35 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically. What's the ° (counterclockwise from east)?? Well I tried using tan=15/35 the degrees ended up being 23 degrees which was

*asked by ashley on October 18, 2007* -
## Physics- Mechaincs

A home run is hit such a way that the baseball just clears a wall 27 m high located 147 m from home plate. The ball is hit at an angle of 37◦ to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1 m above the ground.

*asked by Genevieve on September 17, 2010* -
## Math

If 0

*asked by House on October 3, 2008* -
## Math

In triangle PQR, angle Q= 90 degrees, angle P= 60 degrees and angle R= 30 degrees. PR= 1 unit. Extend side QR to T such that PR= RT. Join PT. Calculate the exact measure of angle T. Determine the exact value of lengths needed to find tan T and then find

*asked by Kausar on February 23, 2017* -
## math trigg.

which triangles do you use COS SIN or TAN?? You can use these relations on any ANGLE. THe sin, cos, and tan are dependent on the angle, it does not matter if the angles are in triangles, or if they are, what kind of triangle. Right triangles are especially

*asked by shelby on June 19, 2006* -
## trig

how to prove ; tan 10 degrees + tan 70 degrees - tan 50 degrees = sqrt 3

*asked by victor_hery on August 31, 2012* -
## trigometric identities

Establish identity: tan theta + cot theta -------------------- equal to(=) csc²theta tan theta Can you draw the ans. bec. I cant understand which they are aligned.

*asked by Alyn on January 14, 2015* -
## Calculus

find the area between x=tan^2y and x=-tan^2y in -pi/4

*asked by Bethany on March 28, 2016* -
## Geometry

Given: KL ║ NM, LM = 45, m∠M = 50° KN⊥NM, NL ⊥ LM Find: KN and KL So I drew it found that m∠K=90°, m∠LNM=40°, m∠KNL=50° using the rules of trigonometry, I got: (NL/45) =tan(50°) and that NL=53.63 I checked it and it was correct so using

*asked by Anonymous on October 27, 2018* -
## math

find tan 30 degrees and tan 45 degrees using the 45-45-90 triangle therom and 30-60-90 triangle theorm

*asked by joan on March 26, 2013* -
## math

Calculate the value of the following, without using a calculator, leaving answers, where necessary, in simplified surd form: (a). sin 120° + tan 300° (b). tan 315° × cos330° / sin(-240°) × sin 570°

*asked by Gilbert on October 14, 2018* -
## evaluation

Evaluate 1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y)

*asked by Jen on October 22, 2006* -
## Math

Solve and prove the identity (tan x+ cot (-x))/ (tan x - cot(-x))= 1-2cos^2(x)

*asked by Annika on January 28, 2017* -
## Geometry

If angle A and angle B are the acute angles of a right triangle, what is the value of (tan A) times (tan B)?

*asked by Bonnie on May 24, 2012* -
## Math

28 envelopes total. 20 are red. The rest are tan or blue. There are 4 more tan ones than blue.

*asked by Anonymous on October 17, 2017* -
## Pre Calculas

Complete the identity sin theta / cos theta + cos theta / sin theta = ? Do you mean (sin theta/cos theta) + (cos theta/sin theta) ? That would equal tan x + cot x = tan x + (1/tan x) = (tan^2 x + 1)/ tan x I don't see any way to further simplify it.

*asked by Robert on June 11, 2006*