Trig check my work please?

87,713 results, page 10

Physics

Why bother using a machine if it cannot multiply work input to achieve greater work output? Please help; need a original answer no Google search. Thank you in advance...

Math please check answer

please check my answer thanks Janet took a standardized test that had 328 questions. She answered 75 %of the questions. How many questions did she answer P = R X B P = 75 % x 328 = .75 x 328 = 246 Portion = 246

ELA Please check answers!

Please check my answer(s) for me. I don't think I understand what adverbs, adjectives, or nouns are in infinitve phrases. Directions: Write the infinitive or infinitive phrase from each sentence. Then write noun, adjective, or adverv to identify its function in the sentence. 1...

Trig

prove(sinx/cosx+1)+(cosx-1/sinx)=0 Please help asap!!!!! PLEASE

math (final trig problem)

Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig questions?? how about ...

algebra 2 logs and trig

log(base 2)cotx - 2log(base 4)csc2x = log(base 2)cosx the answer should be x = pi/3, 5pi/3 not sure how to work it out though, any help? I tried canceling the bases but that led to a dead end.

trig

How do I prove these trig identities? secx-cosx/tanx =sinx And 1+sinx/cosx+ cox/ 1+sinx=2secx

algebra

Solve and check all proposed solutions. Show work for solving and for checking. x+1/x-1 - 2/x^2-x=0

Calculus (check my work)

Find the marginal revenue at x=10 using the equation R(x)=-x^2+80x Is the answer 60?

12th grade Trig

sec theta = 2, sin theta is less than 0. I'm not sure what to do? Please explain. Thank you.

Trig

Could someone please show me how 1 / ( 4 tan (x/2) + 2 ) is converted to: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) TIA Carol

trig

solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)

trig

I need to prove parallelogram law using the law of cosines. 2AB^2 + 2BC^2 = AC^2 + BD^2 Please, help me to do this.

alg2\trig

if a3= 17 & a8=37 are terms in annarithmetic sequece, fina a1 & d. the answer is a1=9 & d=4 but i don't understand how they got the answer, please help!

Pre-Calc/Trig...

Help me do this please. Simplify the expressions using imaginary numbers. 1. √-16 2. √-49

Math (Calculus) (Work)

Six and one-half foot-pounds of work is required to compress a spring 4 inches from its natural length. Find the work required to compress the spring an additional one-half inch. (Round your answer to two decimal places.) This is what I did so far: 4 in = 1/3 ft 6.5 = ∫[0,1/...

BAA App. Essay Help! (please read!)

One of my personal achievements has to do with artistic. When I was in the 7th grade I participate in the 2012 Reflections Competition. The theme was "Diversity Means...". I decided to do visual arts. In my art work, I drew a huge earth and on top of the earth I drew five ...

Algebra-please check

Could someone please check my solution-Thank you-DRWLS helped me set it up and I solved it, I think From the top of a mountain 150 feet high, Jessie stands at the safety rail on the edge and looks below. The angle of elevation from his bike on the ground to Jessie is 38 ...

math

The illumination a surface receives from a light source varies inversely with the square of the distance. A table lamp is 3ft from a certain work area. How far is another work area if it receives only 1/3 as much illumination as the first work area? (W/ solution please, tnx...)

social studies (check answers)--Mrs.Sue

Please check and Thanks so muchh. 1.A 2.B 3.C Brazil’s culture reflects what unique aspect of its colonial history? A. its Roman Catholic missionary roots B. its ties to the West African slave trade C. its rule and settlement by the Portuguese D. its peaceful blending of ...

Calc.

Evaluate the indefinite integral. Please check my work? Not sure if I am doing this correctly. S= integral symbol S x^3*sqrt(x^2 + 1) dx u = x^2+1 x^2= u - 1 du = 2xdx du/2 = xdx 1/2 S x^2 * x sqrt (x^2 + 1) du 1/2 S (u - 1) * sqrt (u) du multiply square root of u and (u - 1) ...

trig

Work out the following identities a)sin pheta / cos pheta b)tan pheta cos pheta

trig

Work out the following identities a) sin theta/cos theta b) tan theta cos theta

trig

how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.

Math- Please check

Please double check me Find the median of the following set of numbers 47,20,52,35,58,57 a. 49 1/2 b 47 c 48 1/2 d 52 Answer: a Which of the following numbers are integers? 2/3, 35, 0.093,-650, 42.5 a 0.093 and 42.5 b 35 and -650 c 2/3 d -650 answer: c

Math- Please check

Please double check me Find the median of the following set of numbers 47,20,52,35,58,57 a. 49 1/2 b 47 c 48 1/2 d 52 Answer: a Which of the following numbers are integers? 2/3, 35, 0.093,-650, 42.5 a 0.093 and 42.5 b 35 and -650 c 2/3 d -650 answer: c

Pre-CalcPlease check

Please check: 1.Write in expanded form: this is a sigma notation- 4 on top signma in middle k=1 on bottom to right of sigma is (k-1)(k-2) I solved: k=1 (1-1)(1-2)=0(-1)=0 K=2 (2-1)(2-2) = 1(0)=0 k=3(3-1)(3-2)=2(1)=2 k=4 (4-1)(4-)=3(2)=6 answer: 0+0+2+6 2. Write 4+9+16+25+36+49...

Math, please check work

A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability of choosing a marble that is not blue? 7+2+1=10 There are two blue marbles So is the probability 1/5?

Trig. Math

The mean score on a normally distributed exam is 42 with a standard deviation of 12.1. Which socre would be expected to occur less than 5% of the time? 1) 25 2) 32 3) 60 4) 67 -I know the answer is 67, but i don't know why .. PLEASE help!

Math Trig

Find the values of the six trigonometric functions of an angle in standard position if the point with coordinates (12, 5) lies on its terminal side? Please explain how!

Math Trig

Find the values of the six trigonometric functions of an angle in standard position if the point with coordinates (12, 5) lies on its terminal side? Please explain how!

Trig

Find the exact values of sec(x)=7. I know that cos(x)=1/7. I know that sin(x)= sqrt(1-91/4900). I know that tan(x)=1. I know how to do the problem but I'm not really sure why, and I'd like to know. I got 4sqrt(3). Please help!

chemistry

Can someone please check my work on this problem? That'd be great!: What is the balanced equation for the chemical change of adding Na2CO3 to CuCl2, therefore making CuCO3 form? CuCl2+Na2CO3-->CuCO3+2NaCl right thank you fill in the blanks! Nuclear reactions involve the ...

Physics

Can you please help me with the following questions? please. 1. how much work do you do on a 25-kg backpack when you walk a horizontal distance of 100 m? -I got 2,500 J 4. if you friend pushes a lawnmower four times as far as you do while exerting only half the force, which ...

polynomial functioms-check

Can you please check my work and answers. Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. 1.f(x) = (x + 1)(x - 3)(x - 1)^2 -I got -1 crosses the x-axis, 3 crosses the x-...

english

Can someone check my work for me, please. 1.Yesterday he was very busy since he had been fixing the TV from noon. 2. He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered the living room, ...

Algebra II-Please check

I'm sorry the computer jammed on an earlier post and I couldn't do anything-so here is the problem I need asistance with Please check and offer advice-I'm NOT SURE IF I USED CORRECT FORMULAS-thank you the problem is List the center, vertices, and foci of hyberbola for ...

Math

"Last year, the personal best high jumps of track athletes in a nearby state were normally distributed with a mean of 229 cm and a standard deviation of 19 cm. What is the probability that a randomly selected high jumper has a person best between 229 and 248 cm?" I think the ...

Reposted: Maths - Trig

I've been told that sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h) but how? please explain

trig

find an equation of the line that passes through (2,-4) and is parallel to the line 3x-y=1. Write your answer in the form y=mx+b. please help!

Trig

Simplify: (1/secx+sin^2x/cosx)cosx. Explain alittle bit, not just do the steps please.

trig

Can you please help me w/ this?? The range of the function y=tan pi x is abs(y) > (greater than or equal to) A The value of A is (a) 0 (b)2 (c)- infinity (d)+ infinity (e) none of these

trig

sin(-π) + cos 5π how to solve without a calculator. Please write steps and explain thank you

trig

if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.

Trig Help (URGENT)

Solve over the indicated interval: 2sin^2x=sqrt2sinx , [-180,180) don't how to get x by itself please help and thank you

Pre-Calc/Trig

Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent

Math HELP

2 boys and 5 girls can finish a piece of work in 4 days. 4 boys and 4 girls can finish the same work in 3 days. If a girl paid rs 750 each day, what may be the expenditure to complete the work? Tomorrow is my test and I don't know how to solve this question. Someone please ...

prealgebra

can you please help me and help me solve this and show work: Identify the percent of change as an increase or a decrease. Then find the percent of change. #1.) Original:45 New:30 Please help i don't understand how to solve and show work

Physics Help Please

Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?

math

six employees of a small company were asked the distance they traveled to work, to the nearest tenth of a mile. find the range of the distances: 2.7,5.9,1.7,4.7,6.9,3.5 This site demonstrates how to find the range of a group of numbers. http://www.mathgoodies.com/lessons/vol8/...

Physics - Check Answers ASAP

Could someone please check over my answers? I'm not very good at physics, and therefore am not sure if I got all of them correct. 1. A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 60.0 m up a 350 slope (ignore ...

English

I still have to check a few other sentences on the same subject. Thank you very much in advance,Writeacher. In particular sentences 4-5-6. 1) If I work at the passion, then it is the job itself that motivates me. 2) I will take up working tomorrow. (is this sentence possible...

Math, please check work

find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (0,0) midpoint: (4, -3) I would Double the midpoint and add on the endpoint The other endpoint would be (8, -6) is this correct?

Algebra 1

Will you please check my work? :) Choose ALL (if any) applicable terms for the events described, then calculate the probability of the events. Jason has a cube with colored sides: red, orange, yellow, green, blue and purple. 1. Rolling a red or a primary color. Choices: ...

algebra 2

check my answer please find the number of zeros(x-intercepts) y=3k^3-6k^2-45k=k(3k+9)(k-5)= k(3k^2-15k+9k-45)=k(3k^2-6k-45) or should i do it 3k(k-5) (k+3)=3k(k^2+3k-5k-15)=3k(k^2-2k-15) which on is the right one please let me know.thanks

Math

I just wanted to double check that I am correct. Answer is in Interval Notation. 1. Solve: |x|<7 Work: -7>x<7 Answer: (-7,7) 2. Solve: |x|>_ 7 Work: -7<_ x >_ 7 Answer: ( - infinity sign, -7] U [7, infinity sign)

Geography

Can someone please check if my answers are correct? 17. An important economic activity in the Caribbean islands today is a. coffee growing b. iron mining c. maufacturing d. tourism A but I think D might be an option as well 24. Widespread unexmployment in the Caribbean islands...

trig

converting degrees to radians. a) 95 degrees i did 95/180=19/36 then i did 19 pie/36. and i got 1.7. is that right if not can someone please explain! thanks so much

trig

determine the solutions for tanxcos^2x-tanx=0 in the interval XE[-2pi,2pi] Ok, please describe the steps to me that you used to solve this! thank you

Trig/Math

3. f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift, and vertical shift of the function please.

Solving trig functions! urgent please help!

1.2sinxtanx + tanx-2sinx-1=0 2.6tan^2x-4sin^2x=1 Both functions is for 0<x<2pi thank you!

chemistry

A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain why. (ii) It ...

trig! please help!

2sin(4t)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x

science(chem) Please Please Please check by today

How many ml of 0.8M KOH should be added to 5.02g of 1,5 pentatonic acid (H2A) Mwt= 132.11 to give a pH of 4.4 when diluted to 250ml before the first eq point pKa1= 4.345 Is the answer 25.2ml? If that IS correct then I need help b/c I can't get that answer... I've got it but I ...

Math

Solve the equation: 4/3-x + 1/x+9 = 5/3-x Check all proposed solutions. Show work in solving and in checking.

MATH

i WANTED TO CHECK MY WORK THE QUESTION IS DIVIDE 4 1/5 BY 14 AND WRITE ITS SIMPLLET FORM...I THOUGHT THE ANSWER WAS 58 4/5

math

i WANTED TO CHECK MY WORK THE QUESTION IS DIVIDE 4 1/5 BY 14 AND WRITE ITS SIMPLLET FORM...I THOUGHT THE ANSWER WAS 10/3

Algebra 2

Is it possible to solve |2x| + 3 =x? I got x= -3, but it doesn't seem to work when you plug it into the original equation to check it..

Math

Simplifying Radicals: 2ã108 ----- ã180y The check mark represents the radicand. How do I work this problem?

Algebra

I can't figure out this problem... 2x-2-(x-1) = 4-1+x-(-3x) solve for x Will you also show your work and check step Thanks, :)Juliet

Math

3. Factor completely and solve. Check your solutions. Show all work. 6x^3 – 15x^2 – 36x = 0

precalculus

find two sets of parametric equations for the given rectangular equation x+y^2=4 can you check my work? x=-y^2+4 y=-t^2 x=-t^2+4 x=-t^3 y=-t^3+4

trig

let P be a point in Q1 such that the slope of the line connecting P to the origin is sq. root of 2 and the distance from P to the origin is 3 units. Find the coordinates of P, state all trig values for angle formed by the line and the positive x-axis, and the measure of said ...

Math-Trigonometry

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 appreciated, thanks.

Physics-Please check if I did this correctly

I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is ...

English

Please check my work. Correctly identifying the part of speech of each of the word in the sentence. The new mail carrier finally arrived. The (definite article) new (adjective) mail (noun) carrier (noun) finally (adverb) arrived (past tense verb).

English

Please check my work. Correctly identifying the part of speech of each of the word in the sentence. The new mail carrier finally arrived. The (definite article) new (adjective) mail (adjective) carrier (noun) finally (adverb) arrived (past tense verb).

Math

Can you please go step by step, Ill show what I did and you can correct me. The question is: a+a(x+1) My way: a+a(x+1) 2a(x+1) 2ax+2a Could someone please check over this and provide a correct answer and my error. Thanks in advance. a+a(x+1) does not equal 2a(x+1) If it was (a...

Trig identities

Sin x/[1-cos(-x)] = csc x + cot x Please Verify the Identity. I have been going in circle with this one... Just a hint would be nice. Thank you.

English-please help

To bring to your organization enthusiasm, dedication, responsibility, and good work ethic, combined with a desire to utilize my skills obtained through work experience. Is that correct sentense??

Intermediate Algebra (Math)

HELP PLEASE, Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -2x Ð 8y = 22 -6x Ð y = 20 At first I tried to multiply by 8 but that did not work.

bookkeeping

received a check for 154.72 for unassembled products includes 8.06 sales tax and 12.30 in transportation what is the entry for the transaction in the sales dept.a sales credit? (a)132.33 (b)134.36 (c)152.72 (d)154.69 my answer is b received a payment for 3296.87 in unassembled...

Physics

This is a question related to work. Today we had a pop quiz in my physics class and I am just trying to check my work here :D 1) if there is a 5 kg block on a horizontal table connected with string to a 3 kg block hanging off the side of the table through a pulley. Assume the ...

English

Can you please check these few sentences I'm not sure of. Thank you for all. 1)My work day starts at 7.55 a.m. I nearly always have to drive my child to school. It usually takes me ten minutes to get there (OR: It's a ten-minute drive.) After that I drive to work. 2)As soon as...

Chemistry

Cyclohexane is composed of 85.6 % C and 14.4% H. when it is mixed in the proper ratio with oxygen, it can be used as an anesthetic. At 755 mmHg, and 25 degrees Celcius, it has a density of 2.05 g/L. what is the molar mass of cyclohexane and its molecular formula? Will you ...

Math PLEASE HELP ME!!

Micheal recives a 9.8% raise. He currently earns $1,789.46 per month. Estimate the amount by which his monthly earnings will increase. Help please I do not understand this problem!! :) SHOW ALL WORK PLEASE & THANK YOU!! :)

Physics

Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 2.8 kg pumpkin to a height of 1.4 m, then carry it 50.0 m (on level ground) to the check-out stand. Calculate the work you do on the pumpkin as you lift it from the ground? and How much...

Trig

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.

Math 30 Trig

How do I find the x-intercept of the graph of y=3sin 2x? Could you explain the steps to put this into my graphing calculator to get the graph. Please and thanks

trig

Find all points of intersection of the polar curves r= 2 + 4cos theta and r= 6cos theta. Please explain in detail.

trig

If cos(t)=(-7/8) where pi<t<(3pi/2), find the values of the following trig functions. cos(2t)=? sin(2t)=? cos(t/2)=? sin(t/2)=?

Please Check(Math)

d+7/d^2+49= / (d+7) (d+7)*I got the bottom but I don't know what to put at the top...please help!!! Please HElp Me!!Sorry,I am trying to e patient... The d+7 on top cancels with one of the d+7 on the bottom and you are left with 1/(d+7)

Math

6x-4y=54 -9x+2y=-69 Which system would work best to solve? Please show work and solve. (all steps) Thank You I honestly don't know how to do this.

trig

A car drives 1000 feet on a road that is 8 degrees to the horizontal, as shown in the figure. The car weighs 3400 lb. Thus gravity acts straight down on the car with a constant force F=-3400j. Find the work done by the car in overcoming gravity?

Algebra

Complete the table for each function. 1. f(x) = √x The x values are 0, 1,4 and 9. The corresponding y values that I got are 0, 1, 2 and 3. 2. g(x) = -1/4√ x The x values are 0, 1, 4, and 9. The corresponding y values that I got are 0, -1/4, -1/2 and -3/4 3. h(x...

Chemistry Need help ASAP

A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain why. (ii) It ...

Chemistry Need help ASAP

A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain why. (ii) It ...

chemistry please help

how do you know if a hydrolytic work up is required for reactions with grignard reagents? What does hydrolytic work up mean is it treatment with aqueous acid

Geometry

1) Explain how you can use a straightedge and a compass to construct an angle that is both congruent and adjacent to a given angle. 2) When constructing a perpendicular bisector, why must the compass opening be greater than the 1/2 the length of the segment? 3) When ...

trig

For each expression in column I, choose the expression from column II to complete an identity: Column I Column II 1. -tanxcosx A. sin^2x/cos^2x 2. sec^2x-1 B. 1/sec^2x 3. sec x/cscx C. sin(-x) 4. 1+sin^2x D.csc^2x-cot^2x+sin^2x 5. cos^2 x E. tanx I figured #1 is C, #2 is A, ...

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