please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1 tan 25° tan 5°
95,216 results
trig
Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities.

math
Find the values of sin θ, cos θ, and tan θ for the given right triangle (in the link below). Give the exact values. www.webassign.net/aufexc2/85003.gif sin θ= cos θ= tan θ= my answer is c^2 = a^2 +b^2 c^2 = 5^2+12^2 c^2 = 169 c= √(169) c= 13 I

Math:)
Which trigonometric functions are equivalent to tan(theta)? Select all that apply. (2 answers) a. tan(theta)**** b. tan(theta) c. tan(theta) d. tan(theta+2pi)**** e. tan(theta+pi/2)

pre calculus 2
use the fundamental trig. Identities to simplify tan^4x+2tan^2x+1

pre calculus
Find the exact values: tan(7pi/4)  tan (pi/6)

trig
please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1 tan 25° tan 5°

Trig
Use the fundamental identities to simplify the expression: cot beta sec beta I used 1+tan^2u=secu since cot is the inverse of tan. I flipped the tangent, then so it was 1+ (1/tan). But the book's answer is the cosecant of beta. Where did this come from??

Precalculus
I am trying to submit this homework in but i guess i'm not doing it in exact values because it is not accepting it. I know i'm supposed to be using half angle formulas but maybe the quadrants are messing me up. Please help! Find sin x/2 , cos x/2 , and tan

trig
Use a sum or difference identity to find the exact value. tan 25deg + tan 5deg / 1tan 25deg tan 5deg

calculus
Find the exact value of the given expression. (tan17pi/12  tan pi/4) / (1+tan 17pi/12 tan pi/4) can you help with this? i got the answer 1/ squareroot 3

trig
use sum or difference identities to find the exact value of the trigonometric function: tan 345 please show work, i cant figure out what im doing wrong!

TrigWeird Geometry Problem
Determine all triangles ABC for which tan(AB)+tan(BC)+tan(CA)=0. There's a hint: "Can you relate AB to BC and CA?" Should I apply the tangent difference formula (tan(xy))? Help would be appreciated, thanks.

math
Given that α is in Quadrant 1 and tan(α)=67, give an exact answer for the following: sin(2α)= cos(2α)= tan(2α)=

Math/precal
Determine the exact value of tan(38pi/12) or tan(19pi/6)

Trigonometry
Find the exact value of tan(ab) sin a = 4/5, 3pi/2

PreCal
Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. (tan(74°)tan(14°))/(1+tan(74°)tan(14°)) =__________ Find it's exact value (not decimal form) =__________ Note: A similar question(but with

trig
TRIG Identities, Gr. 12: Prove: cot4x=1tan^2x/2tan2x

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.

calculus
can anyone tell me if tan1x= 1 over tan x? No. They are different. tan^1 (x) is a frequently used way of writing arctan x, which means the angle whose tangent is x. tan (tan^1 x) = x

trigonometry (please double check this)
Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. a.) ( I got confused doing this 1 can you help me with it.) 3 sin

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

Trig Question
Given that tan x= 3/4 and x is in the second quadrant. Find sin 2x, cos 2x, and tan 2x (Exact, no decimals). Please show stepbystep, thank you!

trig
please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1 tan 25° tan 5°

Trigonometry
Hello, everyone: I am working on finding the exact values of angles that are less common and are therefor not found easily on the Unit Circle (at least, they are not labeled). For example, the problem I am asking about is: 10) Find the exact values of the

Trig
Can someone check my answers so far? 1. Find the exact value of tan(3ð) Answer: tan(3ð) = tan (3 + 2ð) = tan (ð) = tan (ð + 2ð) = tan(ð) = sin (ð)/cos(ð) = (0)/(1) = 0 Exact value is 0 2. Solve triangleABC is C = 90 degrees, B = 20 degrees,

PreCalculus
Hi I need some assistance on this problem find the exact value do not use a calculator cot[(5pi)/12] Here is my attempt RT = square root pi = 3.14...

trig 26
simplify to a constant or trig func. 1. sec ²utan 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

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

Trig Identities
Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x1 = sin^2x  cos^2x 3) 1/cosx  cosx = sin x tan x 4) sin x + tan x =tan x (1+cos x) 5) 1/1sin^2x= 1+tan^2 x How in the world do I prove this...please help... I appreciateyour time thankyou soo

trig
h t t p : / / i m g 4 0 . i m a g e s h a c k . u s / c o n t e n t . p h p ? p a g e = d o n e& l = i m g 4 0 / 1 4 8 / a s d a s d y e . j p g & v i a = m u p l o a d (def of tan theta = a^1 o)a = o opposite = adjacent tan theta written with respect to

trigonometry
1) Find the exact value of the expression: tan−1(tan(−120651/47π))... How do you find Tan(120651/47pi)? I don't know how to find exact values, if it's not a recognizable value. 2)Find a simplified expression for tan(sin−1(a/5))... Because tan = y/x

Maths complex numbers
Find tan(3 theta) in terms of tan theta Use the formula tan (a + b) = (tan a + tan b)/[1  tan a tan b) in two steps. First, let a = b = theta and get a formula for tan (2 theta). tan (2 theta) = 2 tan theta/[(1  tan theta)^2] Then write down the equation

calculus
If limit as delta x approaches 0 of tan(0+Δx)tan(0)/Δx =1 which of the following is false: d/dx [tanx]=1 the slope of y = tan(x) at x = 0 is 1 y = tan(x) is continuous at x = 0 y = tan(x) is differentiable at x = 0

Math
Are these correct? 5. is sin θ = 7/13 and cos θ = 12/13, find tan θ and cot θ using Quotient Identities. answers: tan (θ) = (7/12) cot (θ) = (12/7)

trig help much appreciated! :))
1. Find the complete exact solution of sin x = . 2. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 3. Solve tan2 x + tan x – 1 = 0 for the principal value(s) to two decimal places. 4. Prove that tan2 – 1 + cos2

Trig  tan 15° using composite argument?
tan 15° tan (45°30°) (tan 45°  tan 30°)/1+ tan 45°tan30° (1√3/3)/(1+1√3/3) then i donnt what to do/ chancel out. Can someone finish it if i didn't get it wrong. thanks in advance

trig
How do you find the exact values of sin(u/2), cos(u/2), and tan(u/2) of tan(u)=5/8

mathematics
Given that Sin(A+B)=2Cos(AB) and tan A = 1/3 , Find the exact value of tan B.

Trig.
sec^2xcotxcotx=tanx (1/cos)^2 times (1/tan)(1/tan)=tan (1/cos^2) times (2/tan)=tan (2/cos^2tan)times tan=tan(tan) sq. root of (2/cos^2)= sq. root of (tan^2) sq. root of (2i)/cos=tan I'm not sure if I did this right. If I didn't, can you show me the

Math
trigonometric identities tan^2Ө/sin^2Ө1=tan^2Ө

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

Math homework help
Use half angle identities to find exact value. Given tan theta = sqrt 2 / 2 and theta lies in quadrant IV, find cos theta / 2.

Math Precalculus
Write the expression as the sine, cosine, tangent of an angle (in radians.) (tan(pi/5)tan(pi/3))/(1+tan(pi/5)tan(pi/3))

trigonometry
5.Find the complete exact solution of sin x = √3/2. 10. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 12. Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 19.Prove that tan^2a – 1

Calc
Let F(x, y, z) = z tan−1(y^2)i + z^3 ln(x^2 + 10)j + zk. Find the flux of F across S, the part of the paraboloid x^2 + y^2 + z = 19 that lies above the plane z = 3 and is oriented upward. Thanks! STudying for a quiz... *tan−1 is tan^(1)

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

Trig
1. Establish the identity: sin(theta+3pi/2)=cos(theta) 2. Find the exact value of 2(theta) if sin(theta)=5/13 3. Show that: csc2(theta)cot2(theta)=tan(theta) 4. Find the exact value of tan(cos^1(square root of 3/2) 5. Approximate the value rounded to

Trig
If tan a= 12/15, 0 degrees < a < 90 degrees, then find the exact value of each of the following: A. Sin a/2 B. Cos a/2 C. Tan a/2

MathTrigonometry
Show that if A, B, and C are the angles of an acute triangle, then tan A + tan B + tan C = tan A tan B tan C. I tried drawing perpendiculars and stuff but it doesn't seem to work? For me, the trig identities don't seem to plug in as well. Help is

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

Math
Use an addition or subtraction formula to write the expression as a trigonometric function of one number, and then find its exact value. (tan(π/2)+tan((2π)/3)) / (1tan(π/2)tan((2π)/3)) Answer=__________ Exact value answer=_________ ~Thank you.. I

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

Math
Prove Trig. Identities 1. sec è (sec è  cos è)= tan^2 è 2. tan^2 è (1 + cot^2 è) = sec^2 è

Precalculus/Trig 5
Find the exact value of thet following trigonometric functions: tan(5pi/6) tan(7pi/6) tan(11pi/6)

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

Integration
Intergrate ¡ì sec^3(x) dx could anybody please check this answer. are the steps correct? thanks. = ¡ì sec x d tan x = sec x tan x  ¡ì tan x d sec x = sec x tan x  ¡ì sec x tan^2(x) dx = sec x tan x + ¡ì sec x dx  ¡ì sec^3(x) dx = sec x tan x

Math
Prove that cos2x=(1tan^2x)/(1+tan^2x) I can't find any identities that can help me with this. I'm really confused

math
Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the symmetry of the graphs of sin, cos and tan, to find the exact values of si pi/6, cos 5/3pi and tan 4pi/3. I have found the answers to the first three using the special tables

math
If sinθ=7/13 and cosθ=12/13 find tan θ and cot θ Use Pythagorean Identities to find sin θ and tan θ if cos θ =24/25 if the terminal side of θ lies in the third quadrant.

mechanics (calculating plane speed and climb angle
Two radar stations A and B, are separated by the distance a = 500 m, track the plane C by recording the angles α and β at 1second intervals. If three successive readings are t (s) 9 10 11 α 54.80◦ 54.06◦ 53.34◦ β 65.59◦ 64.59◦ 63.62◦

Trigonometry
Find the exact value of the expression: tan−1(tan(−120651/47π)) I just don't know how to find the exact value. Any explanation would be awesome!

precal
use the given info. to find the exact value of the trig function. csc u=6/5, tan u is greater than 0 Find cos u/2

Trig
Sum and diffence formula Finding Exact value of Tan 105Tan 10)15)/1+ tan(105)Tan(15)

math
Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the symmetry of the graphs of sin, cos and tan, to find the exact values of sin pi/6, cos 5/3pi and tan 4pi/3. I have found the answers to the first three using the special tables sin pi/6

tan x = 1/2
Can someone tell me what the radian value is for this number and how they got it? Thanks On a graph plot the point A(2,1) Let C(2,0) be the point on the xaxis x is the angle AOB and tan x = 1/2 Since angle x is not one of the special angles, you will have

PreCal
Perform the addition or subtraction and use the fundamental identities to simplify. tan x  sec^2 x / tan x I do not know where to start.

Math
How would you solve these questions using Trigonomic Identities? sin^2x = tan^2x/1+tan^2x sinx+cosx/tanx = 1/cosxtanx

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

Trig
Please help me to simplify using identities 1+tan^2x/tan^2x I don't really understand how to do please help

Math trig
Hello guys. I am just wondering if tan^2 A (tan squared A) = sin^2 A /cos^2A And 2tan A = 2sin A / 2cos A This has been bothering me when I have to simplify trig. Thanks in advance.

MATHEMATICS
Given that Sin(A+B)=2Cos(AB) and tan A = 1/3 , Find the exact value of tan B.

trig
Simplify (tan^2θcsc^2θ1)/(tan^2θ) This question totally stumps me. I know that csc^2=1/(sin^2) and tan^2=(sin^2)/(cos^2), but I don't see how I can use these identities to simplify the question. What am I missing? Help is much appreciated!

trig
please help me with some questions I skipped on a review for our test coming up? solve 57 on the interval 0 greater than or equal to x less than or equal to 2pi. 5. sin x=sqrt3/2 6. cos x=1/2 7. tan x=0  14. what is the exact value of

Calculus
Okay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2,

physics (speed of plane by radar)
The radar stations A and B, separated by the distance a = 500 m, track the plane C by recording the angles α and β at 1second intervals, If three successive readings are shown in the table,calculate the speed v of the plane and the climb angle y at t =

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

Math
1.Write the equation 5x+y2=0 in normal form. 5x+y2=0 5x+y=2 (add two to both sides) Standard form (Ax+By=C)> 5x+y=2 Yintercept (when x equals 0) 5x+y2=0 5x+y=2 5(0) +y=2 y=2 Xintercept (when y equals 0) 5x+y2=0 5x+y=2 5x+0=2 x=2/5 Slope intercept

MathTrig
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(90degΘ), Tan(Θ), csc(Θ), Sec(Θ+360deg), Thanks

math
Find the exact value of each trigonometric function. sin(θ)= 3/5 cos(θ)= 4/5 tan(θ)= 3/4 1. cos(2θ)= 2. tan(2θ)= 3. cot(2θ)= 4. sec(2θ )= 5. csc(2θ)=

math
um take home test...i have no idea what im doing always sometimes never 1. sin2x=2sinx 2. cos (pie/3+x)=sinx 3. if tan x=3 and tan y=2 then tan (x+y)=5 4. when you use the half angle formulas you choose whether to use a + or  by noting in which quadrant

PreCal
Suppose that cosx= 3/5 and x is in the third quadrant, and that siny= 2/9 and y is in the second quadrant. Find the exact values 1). tan(y/2) 2). cos(x+y) 3). tan(x+y)

PreCalculus
This question has me stuck. Use the Pythagorean identity sin^2 Θ + cos^2 Θ = 1 to derive the other Pythagorean identities, 1 + tan^2 Θ = sec^2 Θ and 1 + cot^2 Θ = csc^2 Θ. Discuss how to remember these identities and other fundamental identities.

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

calculus
So I am suppose to evaulate this problem y=tan^4(2x) and I am confused. my friend did this : 3 tan ^4 (2x) d sec^ 2x (2x)= 6 tan ^4 (2x) d sec^2 (2x) She says it's right but what confuses me is she deriving the 4 and made it a three? I did the problem like

mult'vi calc
Let F(x, y, z) = z tan−1(y^2)i + z^3 ln(x^2 + 10)j + zk. Find the flux of F across S, the part of the paraboloid x^2 + y^2 + z = 19 that lies above the plane z = 3 and is oriented upward. Thanks! STudying for a quiz... *tan−1 is tan^(1)

math (trig)
Given tan 0 = 5/12 determine the possible values of 0 to the nearest hundreth So what I did is find that tan1(5/12) equals 0.35. Then because tan can be negative in quadrants 1 and 3 subtract 0.35 from pi and then from 2pi. So I got 2.79 and 5.933 I'm

PreCal
[Note: This one... is super hard for me :( I really need help. please. I only have 2 hours left and I have no idea what I'm doing!! Suppose that cosx= 3/5 and x is in the third quadrant, and that siny= 2/9 and y is in the second quadrant. Find the exact

trigonometry
5. Find the complete exact solution of sin x = √3/2. 9. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 21. Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 22. Prove that tan^2a –

Maths Calculus Derivatives
Find the first derivative for the following functions 1) f(x) = sin(cos^2x) cos(sin^3x) 2) f(x) = ( tan 2x  tan x ) / ( 1 + tan x tan 2x ) 3) f(x) = sin { tan ( sqrt x^3 + 6 ) } 4) f(x) = {sec^2(100x)  tan^2(100x)} / x

trig
Find the smallest positive value of x(in degree) for which tan(x+100°)=tan(x+50°)*tanx*tan(x50°)

Precalculus
What two common identities are most useful for simplifying 2tanx/sin^2x + cos^2x  tan^2x? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1tan^2x

Precalculus
1. What two common identities are most useful for simplifying 2tanx/(sin^2x + cos^2x  tan^2x)? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1tan^2x

math 105
Prove that tan(A+B+C) =(tan A + tan B tan C  tanAtanBtanC) ÷(1tanAtanBtanBtanCtanAtanC)

calculus
I need help on finding the local linear approximation of tan 62 degree. i got 1.77859292096 can someone check if i got it right? tan(60+2) = (tan 60+ tan 2) / (1 tan60 tan 2) But tan2 appx = sin 2deg = sin2PI/180= 2PI/180 tan 62=(tan 60+2PI/180) / (1

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

Calculus  Integration
Hello! I really don't think I am understanding my calc hw. Please help me fix my errors. Thank you! 1. integral from 0 to pi/4 of (tanx^2)(secx^4)dx It says u = tan x to substitute So if I use u = tan x, then my du = secx^2 then I have integral of (u^2)

Trigonometry
use the appropriate trig identity (sum and difference, half angle, double angle) to find the exact value. 1)cos 255 degrees 2) sin 165 degrees 3) tan 285 degrees

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)

more trig.... how fun!!!!
if you can't help me with my first question hopw you can help me with this one. sec(x)/csc(x)=tan(x) thanx to anyone who can help From the definition of the sec and csc functions, and the tan function, sec(x)/csc(x) = sin(x)/cos(x) = tan(x) However,

calculus
find dy/dx y=ln (secx + tanx) Let u= secx + tan x dy/dx= 1/u * du/dx now, put the derivative of d secx/dx + dtanx/dx in. You may have some challenging algebra to simplify it. Use the chain rule. Let y(u) = ln u u(x) = sec x + tan x dy/dx = dy/du*du/dx