Trig check my work please?

88,487 results, page 70

trig

If sec theta = radical 5, what is the exact value of cos theta

trig

If sec theta = radical 5, what is the exact value of cos theta

trig

find the single term of cos^2 4theta - sin^2 4theta

Precalc/Trig

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

trig

Find the Opposite of the right angle where the angle is 61 degrees and the Adjacent is 10 cm.?

Trig

The point P(3, 4) is on the terminal side of θ. Evaluate tan θ. 3/4 3/5 4/3 4/5

Trig

How do I prove that tan(x/2) =( plus/minus) sqrt(1-cos(x/1+cos(x))

Trig

Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly.

Trig

Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x

Advanced Functions/Trig

Prove the identity: cos^4 x + sin^4 x = 1 - (1/2)sin^2 (2x)

trig, math

In a right triangle with g the right angle, b = 86.5 and c = 125.8. What is β ?

trig

Find all solutions in the interval [0,2pi]. sin 2x + sin x = 0

math trig

a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.

Trig

Given sin x = 5/13 and 0 < x < pi/2 find the value of sin(π − x). 12/13 5/13 -12/13 -5/13

trig

If each leg has length 5 meters, what are the lengths of the other leg and the hypotenuse

Trig

Solve for t algebraically: inverse cos(t) = inverse sin(t). Where do I start?

Trig

Is a triangle that has sides which measure 8, 15, and 17 a right triangle? Justify your answer, ie,

PE CHECK ANSWERS

15. Who should address the needs of a patient with a mental disorder? A. speech therapist B. An internal Medicine Doctor C. A mental health Professional*** D. A medical intern 12. If you've started a lot of hobbies all at once, you should watch out for clinical depression to ...

statistics/ please help ASAP

a set of data is normally distributed with a mean of 500 and a standard deviation of 100. a) what would the standard score fora score of 700 be? b) what % of scores is between 500 and 700? c) what would the percentile rank for a score of 700 *please show and answer all ...

Calculus - Integrating

Question: ∫(x^2)/sqrt(x^2+1) u=x^2+1 , x^2= u-1, du=2xdx ∫(u-1)/sqrt(u) , expand ∫u/sqrt(u) - 1/sqrt(u) Integrate: 2/3(u^(3/2)) - 2u^(1/2) + c My answer: [ 2/3(x^2+1)^(3/2) - 2(x^2+1) + c ] When I took the derivative of this to check my answer, it was not (x^2)/sqrt(x^2+...

Grammar and Composition

please check: indicate the relationship of each pair by writing S for synonyms, A for antonyms, and H for homonyms. 1. here/hear : H 2. opinioned/unyielding : A? 3. altogether/all together : H 4. misunderstood/misinterpreted : S 5. moderate/excessive : A 6. course/coarse : H 7...

trig

convert 80 degrees into radians 80 deg *2PI rad/360 deg = ?

Trig

Find the area of ABC if A=56 degrees, b=20ft, and c=12ft. 1/2(20)(12)sin56 1/2(240)sin56 99.5

Trig

Verify that (secx/sinx)*(cotx/cscx)=cscx is an identity. (x=theta BTW)

trig

If sinx = -3/5, tan x > 0, sec y = -13/5 and cot y < 0, find the following: a. csc(x + y) b. sec (x - y) How do I get the answers of a. -65/33 b. -65/16 Thank you

trig - identies

Assume that A and B are in standard position and that sin A = 1/2, cos A >0, tan B = 3/4, and sinB<0 Cos (A-B)

Trig

Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(-lnx) I know the rules I just don't understand how they apply.. thanks!

trig

Given that sin(5x-28)degree=cos(3x-5),0 lessthan x lessthan 90degree,find the value of x.

trig

find the fundamental solution set (FSS) for(cos2θ)(tanθ+1)=0

Trig

Given that tan(pi/2) = a. Express tan(x) and sin(x) in terms of a. Hint: Use the fact that x = 2.(pi/2)

trig

given that tan(x/2)=a. Express tan(x) and sin(x) in terms of a. Hint: use that fact that x= 2*(x/2)

Trig.

In right triangle ABC, C is the right angle and sinA=(radical 3/2). What is the value of csc B?

Pre- cal Trig

2cos^2x=cosx. Can you subtract the cos from cos^2? Or what would i have to do?

Trig, Math

State the amplitude, period, phase shift, and vertical shift of f(x)=2cos(1/2x-pi/6)-1/3

Math/Trig

Solve: sin x - 2sin x cos x = 0 for 0 is less than or equal to x is less than 2pi.

trig

Cos theta= 1/3, find the remaining trigonometric functions of the acute angle theta

trig

The parametric equations for a curve in the x-y plane are x=2+t^2 and y=4-3t. Determine the points where the curve intersects the x-axis.

trig

if x and y are positive acute angles, tan x=1/3and tan y =1/4, find the value of sin(x-y)

trig

Use the appropriate identity to find tan(theta) given that cot theta =0.05.

trig

Given that sin theta= 3/5 and the terminal side is in quadrant II, find tan (pi/2 - theta)

trig

whatis the possibilities for the square root of 2 times tan theta = 2 sin theta

trig

a right triangle contains a 25 angle. if me leg is of length 5 inches what is the length of the hypotenuse

Trig

Prove that the equation is an identity: cot4theta - csc4theta = -cot sq theta - csc sq theta How ??

Trig

3. In the figure below, the perimeter of the parallelogram ABCD is (6a + 8b + 29) and the perimeter of the triangle ACD is (3a + 4b + 32). What is the length of AC

Trig

cos45cos25 - sin 45sin25 = ?? a. cos70 b. sin70 c. cos 20 d. sin 20 which answer is correct ?

Trig

If the center of a circle is at (2,2) with a radius of 4 the equation of the graph would be : a) (x-2)^2 + (y-2)^2 = 16 b) (x+2)^2 + (y+2)^2 = 16 I think it would be b is that correct?

trig

A ship sails 40 miles SOUTH and 15 miles EAST. Find the bearing from where it began? HELP.

trig

find all the values of X between 0 and 2π such that cos(3x-π/2) = √3/2

Trig

Is the angle 11pi/12 on the unit circle the same as the angle -pi/12? I'm thinking it would be, but I'm not sure.

Trig

What is the exact value of tan(s+t) if sin(s+t)=56/65. And cos(s)=5/13 and sin(t)=4/5. Everything is in the first quadrant

trig

If it is given that tan(A-B)=tanA-tanB/1+tanAtanB and tanP-1/1+tanP=tan195 find p

Precalc with Trig

What value(s) of x from 0 to 2pi solve the following equation: cos squared x - cos x - 6 = 0

trig

find the minimum and maximum value of sin100 degree plus cos100 degree

Trig

Evaluate and simplify cos(-15º). Hint: Substitute 30º-45º for -15º.

trig.

If P (x, y) is the point on the unit circle determined by the real number θ, then tan θ= x/y y/x 1/x 1/y

Trig

If the terminal side of an angle theta contains the point (-1,3), find secant theta.

Trig

Given Tan(A) = 5 in Quadrant III and Sin(B) = ⅔ in Quadrant II, find Cos(A-B).

To Reiny

Reiny could you please check my Calculus post below, it says Calculus--Reiny.

calculus

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x = 1/2 For the vertical ...

kaley

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x = 1/2 For the vertical ...

Health/Law

Please check my answer thanks:) Bob obtains a judgement against Ned and knows that Ned earns a good salary Bob should.... 1. obtain an order of garnishment 2. obtain a writ of execution I picked #1

Health/ Basic Clinical Procedures

please check my answer thanks true or false Mercury glass thermometers are being repalced by disposable,and digital thermometers mainly because the riskof mercury posoning I said true

Latin

can you please check my declensions? socius soci socio socium socii sociorum sociis socios sociis gladius gladi gladio gladium gladio gladii gladiorum gladiis gladios gladiis Thanks for your help

Math

Im going to try another percentage problem. Will you please double check me. Thanks for all your help! 2580/4440=.581081081 Change to percent and round to nearest tenth. .581081081*100=58.108 rounded to nearest tenth is 58.1%

English

Can you please check these questions, too? Thank you. 1) Answer four of the following six questions. For each question write ten lines only. 2)Do not exceed the space provided. One of your four answer will be evaluated as an oral test.

chemistry(Please Check)

You have a 4.0 L steel tank containing hydrogen gas. You are able to heat or cool the tank, and measure the pressure of the gas. At what temperature, in Celsius, would you read a pressure of 4.5 atm ? 298

bobpursly & countiblis,math

I thought that we can solve anything with equations is it always polynomials. Isn't this the same thing as finding the unknown for an equation. As i said in my previous message or am i wrong. Also what about the rational expressions what are some challenges about working with ...

Math

a. Which values from the set {1, 2, 3,4} are solutions of (line _ this > )2x +5) Show your work? b. which values from the set {1,2,3,4} are solutions of 11 > 2x + 5? Show your work. How are your answer from parts a and b different? How can I tell the answers are ...

solving for x math

2e^(4x^2)=3 how do i solve for x. do i use the ln methode because i don't know how to do that. by calculator, i got x=.168 but i don't know how to show my work. please help me solve for x. Take natural logs of both sides. ln 2 + 4 x^2 = ln 3 4 x^2 = ln (3/2) = 0.40547 x^2 = 0....

Economics

suppose you have a factory that makes pens and the demand for the pens decline, and there are more people willing to work due to a recession. does this result in an increase in supply? please explain

simple chem

a balloon with a volume of 1.375 L is released from earths surface at sea level. what will the balloon occuy at an altitude of 20.0km, where the pressure is 10 kpa? pleasee help!! show work please

General Question

On a home work assignment it gives the page number and the problems to do followed by E3P. Does that mean every 3rd problem.(It shows 1-26 E3P, but I thought it would be 1,3,6,9,12,15,18,21,24,27) Please help. Thanks

7th grade math

Solve by applying the counting principal. When using a four number PIN, how many different PINs are possible? a*b*c=___ I need help.. how do I work this? Step by step please.

precalculus

i need help with homework which is due tommorow determine algebraically whether the graph of the given equation is symmetric to the y axis the x axis or the origin the equations are 5y=7x^2-2x can u show work please thanks in advance

physics

A 22 kg sphere is at the origin and a 12 kg sphere is at (x, y) = ( 22 cm , 0 cm) At what point or points could you place a small mass such that the net gravitational force on it due to the spheres is zero? please show all of work...i don't get it

Calculus

Find the solution of the logarithmic equation: ln(x+8)+ln(x–8)=0 Im not sure how to approach this one. I tried moving the ln(x-8) to the other side and solving for x and that did not work. I also tried putting everything as an exponent to e. please help! thanks

Physics

I NEED HELP! Already answered on here but does not make sense/work. Please HELP! A 2.7 kg balloon is filled with helium ( density = 0.179 kg/m^3). If the balloon is a sphere with a radius of 5.2m , what is the maximum weight it can lift?

math

You invest money that pays 6.3% interest/year compounded quarterly. How long should you invest if want to double initial investment? I tried A=P(1+r/n)^nt, but it didn't work, using A=2P. the principle is not given. Please help

math

a refreshment stand at the fair was open for 3 hours. four people each took turns working at the stand for the same amount of time hoe many minutes did each person work ?? HELP PLEASE !!!

Chem II

Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.

Statistics

Suppose. Population of test-scores is normally distributed with mean 65 and standard deviation 13 x~n (65,13) if you select a test at randome what is the probability that the score is below 60 or that it is between 65 and 70 please show work!

AP Calc Help!!

Let f be the function satisfying f'(x)=x√(f(x)) for all real numbers x, where f(3)=25. 1. Find f''(3). 2. Write an expression for y=f(x) by solving the differential equation dy/dx=x√y with the initial condition f(3)=25. Please show work and reasoning.

Economics help please!!!

In a specific industry, two dominant firms work together to set prices. We call this A. competition. B. collusion. C. market dominance. D. market influence. Answer this Question

Math

PLEASE SHOW YOUR WORK.. Marty paid $72 for a jacket that had been marked down 20%. Create a linear model to represent this and use it to calculate the original price of the jacket.

Algebra 2

Find the values of the 30th and 90th percentiles of the data. Please show your work. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152

READ

All students. Please do not post test or quiz answers to Jiskha. It is cheating and doesn't benefit you in any way. If you need help on homework or anything else, be sure to show your work and possible answers. Thanks :)

physics

A solid uniform cylinder of mass 4.6 kg and radius 0.051 m rolls without slipping at a speed of 0.78 m/s. What is the cylinder’s total kinetic energy? please show some work so that I can learn from it.

Calc

FInd the derivative of each of the following function. f(x)=xcosx+x^4e^2x All I know is the rule with the e^u equation where you would do e^2x times 1. other than that I dont know what to do can someone please help and show all work I will appreciate it greatly

English

Can you please check the following sentences for me, please? Thank you 1) The first inhabitants of Great Britain were the Iberians. They were followed by the Celts. 2)) They were organized in tribes (or used to live in tribes?) and were skilled (a synonym? experienced, ...

Chemistry (Check)

Calculate the DHrxn of C6H12O6 (s) + O2 (g) --> CO2 (g) + H2O (l) with DHf. C6H12O6(s) -1260.04 O2(g) 0 CO2(g) -393.5 H2O(l) -285.840 I balanced the equation: C6H12O6 (s) + 6O2 (g) --> 6CO2 (g) + 6H2O (l) and my work: DHrxn = [12mol(-393.5+(-285.840))] - [7mol(-1260.04+0...

Calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 532.] Enclosed ...

calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 1028.] Enclosed ...

calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 1028.] Enclosed ...

CRT205

Please check to see if I have this correct. Premises: The desire to incarcerate juveniles with adults is based on public fear. Premises: The public fears that juvenile crime is increasing. Conclusion: However, crimes committed by youth are actually decreasing

dog behavior

please check my answer thanks so much :) For which one of the following situations would you use a high-pitched voice? A. Teaching the emergency down command B. Reprimanding a dog for misbehavior C. Communicating your authority to a dog D. Calling a dog to come to you I picked D

4th grade English

Please check the following, thanks. First Syllable Accented Cancel Chamber Gather Tender Damage action Second Syllable Accented Frosty Mustang Convince Belief Behave Certain Remind Confuse Contain

Engineer

can please someone check the answer for me Q )if a mobile user is 0.8 km from the antenna calculate the propagation delay suffered by the signal, due to transmission time alone, when it traverses the network from user to antenna. Answe- 0.8km/3000000 km/sec (speed of light)

American Gov't--please check

With the exception of _____ and _____, the candidate who wins the majority of the popular vote automatically receives all of the electoral votes. 1.)Virginia, North Carolina 2.)Minnesota, Vermont My answer3.)Maine, Nebraska 4.)Maine, Florida

Stat Help Please

Yearly stock returns on India's Sensex Index are well described by a Normal model with a mean of 18.36% and a standard deviation of 14.65%. give the stock return cutoff for the middle 30% of all years. I used TI-83 Calc. for these. Can someone check them? Thank you! Q1=InvNorm...

Health

after neglecting to look before diving into the pool, your friend hits his head on a rock and disrupts his __________ causing him to be paralyzed from his waist down A. cardiovascular system*** B. circulatory system C. nervous system D. endocrine system Please check

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