# Trig check my work please?

87,713 results, page 69

### trig

if tan x= 4/3 and pip < x < 3pi/2, and cot y= -5/12 with 3pi/2 < y < 2pi find sin(x-y)

### Precalculus with Trig

Rewrite the following expression as an algebraic expression in x: cos(arcsin(x))

### math trig

a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle

### Pre-Calc/Trig...

Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=x^2+7

### Pre-Calc/Trig...

Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=(x+5)^2

### Pre-Calc/Trig

How would I solve this one? I just can't get this one. 6x^2+11x-35=0

### trig

solve triangle ABC which have angleA=25.25,angleB=60.51 and a=3.82..find c...,find b

### trig

A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road?

### Trig

Find the algebraic expression that is equal to sec theta - cos (-theta)

### Trig

Find sin(x+y), cos(x-y), tan(x+y), and the quadrant of (x+y) if sinx= -1/4, cosy= -4/5, with x and y in quadrant 3.

### Math (Trig) lowering powers

If cos^4(3x)-sin^4(3x)=cos(g(x)) then g(x)=? Use a^4-b^4=(a^2-b^2)(a^2+b^2)! thanks in advance for any help!

### trig

if sec theta =sqrt -20/3 state the exact value of tan theta

### To Reiny

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

### 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

### Math (Trig)

Solve the equation for exact values of x. sin(x) = 1-2(sin(x))^2

### simplyfying expressions (trig)

can anyone tell me how to do this? thanks! (sin (x) / 1 + cos (x) ) + ( cot (x) / 1 + cos (x) )

### Algebra II/Trig

Simplify: 1/5(-5a^2b^3)^2(abc)^4 How do you simplify this. How does the "-5" play a role in this? how would you get 1/5 of "-5"

### 11th grade Algebra 2/ Trig

The expression log 10^(x+2)- log 10^x is equivalent to???

### trig

unsure how to find phase shift,vertical shift of y=-2cos(x+3.14/4)+5

### trig

determine the coterminal angle between -360 and 360 for -540

### trig

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

### trig

How do you convert polar coordinates to Cartesian coordinates? And vise versa.

### trig

tan(theta)=(7/24), sin(theta)<0 find cos(2theta)

### Trig

Tan theta 12/5 ,pi <theta<3pi/2 Find sin 2theta

### trig

If cscx=2 and x greater 90 degrees and x less than 180 degrees, then sin x/2 =

### trig

Plot the point and then find three representation of the point (3,2pi/3)

### trig

Suppose that sin x = 1/5 and cos y = 2/3, and x and y are each angles in Quadrant 1. Determine sin(x+y).

### trig

let sin theta = -7/25 with theta in QIV find sec (2theta)

### trig

True or false? If A and B are angles of a triangle such that A > B, then cos A > cos B.

### trig

angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)

### trig

an angle 30 with the distace of 24km and an angle of elevation of 45 with the distance of 15km.

### trig

how do you solve 2nd cos 6/11 (my calculator doesn't have 2nd function0

### trig

Verify that each trigonometric equation is an identity tan^2+1/sec Î± =sec Î±

### trig

Find sin(2theta) if tan of theta = 7/24, pi < theta < 3pi/2 ?

### trig

Derive the identity 1 + cot ^2 theta = csc^2 theta by dividing x^2 + y^2 = r^2 by y^2

### trig

1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x

### trig

To the nearest degree, determine the measure of <X for each value of tan X if the tan X = 0.25

### Trig

Solve the equation in the given domain cos 4x + cos 2x = 0, 0<(or equal to) x < pi

### trig

A and B are acute angles such that cosA =3 over 5 and cosB =12 over 13

### trig

Prove that the statement is an identity: (tanx/cscx)=(1/cosx)-cosx

### trig

Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25

### trig

If csc theta = 2, then what is theta approximated to 4 decimal points? RADIANS

### math/cal/trig solve for t

solve for t: 0=4sin(2t)cos(2t)-sin(2t)

### 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,

### 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 ...

### 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 ...

### 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

### 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