Friday

July 25, 2014

July 25, 2014

Total # Posts: 800

**trig**

Write the complex number in trigonometric form, using degree measure for the argument. -12 - 16i

**trig**

Convert the rectangular coordinates to polar coordinates, using radian measure for the angle. (6, -6) 6√(2),7π/4 OR -6√(2),5π/4

**trig**

Solve the equation. Express your answer in trigonometric form. x^5 - 11 = 0

**trig**

Find the indicated roots. Write the answer in trigonometric form. Fourth roots of 256(cos 220° + i sin 220°)

**trig**

Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form. [2(cos 240° + i sin 240°)]^5

**trig**

Find the dot product a*b. a= (5,-9), b=(4,-3)

**trig**

estimate the components of the vector. Round to one decimal place. [v] = 33.9, θ = 65.9° Find the horizontal and vertical components of v, and write in component form.

**trig**

find the indicated vector. let u = (-9,1), v=(-5,9). Find 3u+v

**trig**

Find z1z2 and z1/z2 for the pair of complex numbers using trigonometric form. z1=4+9i, z2=-5-5i I got z1z2 = 25-65i But cannot find the z1/z2.

**trig**

slove the equation exactly over the interval [0, 2pi) sinx=1-2sin^2x

**trig**

use an identity to write the expression as a single trignometric function. squ root 1-cos48°/2

**trig**

choose the expression that is equivalent to the given expression. 2 cos^2 4x-1

**trig**

Use the fundamental identities to simplify the expression. cos^2θ/sin^2θ+cscθsinθ I got tan^2theta

**trig**

i got it now. thanks

**trig**

so the answer is 330

**trig**

fidn all values of tehta in [0, 360) that satisfy the equation. √(3)tan(θ/2)=-1 I have four choices 300, 330, 150 , 120 and i got 120

**trig**

Multiply and simplify. (cos x - sin x)^2

**trig**

Choose the expression that is equivalent to the given expression. sin 6x tan 3x I got 2 sin^2 3x

**trig**

Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2tan 2pi/3 / 1-tan^2 2pu/3

**trig**

Solve the right triangle with the given sides and angles. a = 3.0, B = 31.0°

**math**

2. The sales tax rate applied to all purchases within a state was 0.04 (4 percent) throughout 2006 but increased to 0.05 (5 percent) during all of 2007. The state government collected all taxes due, but its tax revenues were equal to $40 million each year. What happened to th...

**math**

Market price with no tax is where supply equals demand, so at $7. b) The two dollar tax is reflected in the price that people have topay, but it does not give a firm extra income. For instance, pricewas $7 in part a. Now with the tax, people pay $9, but the firmonly earns $7. ...

**Physics **

Calculate the change in potential energy of a 86.9 kg man when he takes an elevator from the first floor to 15th floor, if the distance between floors is 4.47 m. *This building has a thirteenth floor! Keep in mind that he stands on the floor of the top floor, not its ceiling!

**Calculus**

An arithmetic progression has terms a8 =23 and a20 =83 . What is the value of the term a12

**trig**

Find all values of ¸ in [0°, 360°) that satisfy the equation. 2 sin 2θ - √(3) = 0

**trig**

Find all real numbers in [0, 2π) that satisfy the equation. cos 2x = √(2)/2

**trig**

Find all angles in degrees that satisfy the equation. Round approximate answers to the nearest tenth of a degree. tan α = -1.85

**trig**

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

**trig**

Find cos(A+B). cos A=1/3 and sin B=-1/2, with A in quadrant I and B in quadrant IV.

**Trigonometry**

In a triangle ABC, if 2sinB=sinA+sinC and sides a+c=70, what is side b?

**trig**

for the given angle, name the quadrant in whihc the terminal side lies. -350deg

**trig**

identify the quadrant in which 0 lies. sin < 0 and sec > 0

**trig**

determine the period of the function. y = cot 4t

**trig**

Identify the quadrant in which θ lies. sin > 0 and tan < 0

**trig**

Find the trigonometric function value of angle θ. Cos θ = 2/7 and θ is in quadrant IV. Find sin θ.

**trig**

The point (-3, 4) is on the terminal side of angle θ in standard position. Find cot θ.

**trig**

Given that θ is an angle in standard position whose terminal side contains the given point, provide the exact value of the indicated function. (-2, -3) Find sec θ.

**Polynomials**

The polynomial P(x)=ax^3+bx^2+cx+d leaves a remainder of 10x+11 when it is divided by x^2−1. It leaves a remainder of −6 when it is divided by x^2+x+1. What is the value of bc−ad

**Complex numbers**

If f(x) is a polynomial with real coefficients such that f(4+3i)=31+16i, then f(4−3i)=a+bi. What is the value of a+b

**Maths**

thank you very much

**Maths**

A and B are real numbers such that the two quadratic equations 19x^2+3x+2=0 and Ax^2+Bx+7=0 have a common root. What is the value of A+B

**Trigonometry**

What is the maximum integer value of x, where x<200, that satisfies the following inequalities: sin(90+180x/100)<0 and tan(180−180x/100)<0 ?

**Algebra**

you mean 527. Thanks a lot

**Algebra**

f(x)is a monic cubic polynomial with real coefficients. f(x) has 7+4i as a root and f(0)=−2145 . What is the coefficient of x in f(x) ?

**Maths**

The roots of the polynomial f(x)=7x^2 +38x+c=0 are reciprocals of each other. What is the value of c ?

**MATHS**

558

**Math- 5th grade**

1/60

**Math**

2/5 of 5 is 2, so 5-2=3 left

**Calculus II**

1.125

**math**

235/99

**Maths**

How many rational numbers in the interval (0,1) , when expressed in lowest terms, have denominators less than or equal to 10

**heeeeeeeeeeeeeelp Physics**

Finally 0.572 is correct

**MATHS**

Already answered. 21^2=441

**geometry**

81

**Geometry**

39

**Calculus**

If polynomial functions f(x) and g(x) satisfy d/dx {f(x)g(x)}=2x , f(0)=−3 , and g(0)=3,what is f(10)g(10) ?

**Algebra**

468

**Algebra**

What is the sum of all possible integer values of x such that (x^2−35x+305)^(x^2−42x+416)=1?

**Trigonometry**

f(x)=105sin(kx+m) , for some real numbers k and m , and g(x)=f(x)/5. What is the maximum value of g(x) ?

**Algebra**

If a is a real number and a cubic equation f(x)=x^3−12x^2+(a+20)x−2a has a repeated root, what is the sum of all the possible values of a ?

**Algebra**

What is the smallest possible positive integer x>5 , that leaves a remainder of 5 whenever it is divided by 14 , 8 or 77 ?

**Algebra**

How many distinct rational numbers can be expressed in the form a/b, where a and b are integers such that 1<=a<b<=10

**chemistry**

which melts at a low temp in a solid nonelectrolyte what type of solid is it

**Trigonometry**

Given that cos(3x)=acos^3(x)−bcos(x) is a trigonometric identity, what is the value of a+b

**Trigonometry**

Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the value of a+b ?

**Trigonometry**

If sinx−cosx=1/2 then cot^2 (2x)=a/ b, where a and b are coprime positive integers. What is the value of a+b ?

**Numbers**

How many positive integers less than or equal to 1000 are common multiples of the three numbers 8,100, and 40

**maths**

53

**Logarithms**

if loga(b)=1/48 what is the value of logb(a^2) ?

**calculus**

If x=t^3 and y=3t^5, where t is any real number, what is the derivative of y with respect to x at x=125 ?

**Algebra**

If the sum of 3 non-zero distinct real numbers a, b and c is 2 , and the two sets {a,b,c} and {1/a ,1/b ,1/c} are the same, what is the value of a^2 +b^2 +c^2 ?

**Trigonometry**

Given that tan84=T , how many solutions are there to tanx=T in the domain [0,1000] ?

**Trigonometry**

Let O be the origin and P be a point in the fourth quadrant on the x-y plane. Let 270<z<360 be the angle formed by OP with the positive x-axis. Similarly Q is a point in the fourth quadrant on the x-y plane where |OQ|=|OP| and the angle formed by OQ and the x-axis is 7z ...

**Algebra**

Let S be the sum of all values of r such that the coefficient of the x^2 term in the expansion of (x−3)(rx+2)^3 is −6 . If S=a/b, where a and b are coprime positive integers, what is the value of a+b

**P&P**

Peter is walking from the library to school at a rate of 40 meters per minute. At the same time, Paul is walking from school to the library. After they meet each other, Peter still needs 6 minutes to get to school, while Paul is 200 meters away from the library. What is the di...

**Ratios**

If the ratio of x+y to x−y is 279/262 , then the ratio of y to x can be written as a/b where a and b are coprime positive integers. Find a+b

**Numbers**

What is the smallest possible natural number x>5 , that leaves a remainder of 5 whenever it is divided by 14 , 8 or 77

**Maths**

There are two complex roots to the quadratic equation z^2 +(1−16i)z+(−80+10i)=0 . What is the value of the larger of the two norms of the two roots?

**Math**

Find the sum of all primes q<1000 such that for some prime p<q , both q divides p^3 -1 and p divides q^3 -1

**Calculus**

p'(53) = (-.009)(20.6)e^(-.009(53)) = -.1854e^((-.477) = -.1854 * .62064 = -.115067 = -.115067 * 100 = -11.5067 % change in relocation rate

**physics**

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

**physics**

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

**Please help science **

Most organisms reproduce: Sexually Asexually By meiosis Is it asexually or sexually not sure I think it is asexually though

**Science **

Most organisms reproduce: A. Sexual B. asexual C. By meiosis Is it b not sure between b and a

**Science**

Most microrganisms reproduce: A. Sexually B. asexually C. By meiosis A or B not sure

**Math**

A study determines that 60% of the voters in a town intend to vote for the incumbent mayor. If a sample of 8 people is selected, using the binomial formula, what is the approximate probability that 6 of the 8 people surveyed intend to vote for the incumbent? A. 0.47 B. 1.28 C....

**maths**

perpendicular avenue is perpendicular to tangent street and passes through D(17,8).find its equation

**English**

The a in the word saving sounds like A. Ape B. pat C. Heated D. Naughty Is it a

**statistics**

I did not change names I have two children in college and they had different questions ask before you blame

**statistics**

The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between 90 and 100 months.

**statistics**

The amount that airlines speed on food per passenger is normally distributed with means $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50?

**Program Logic Design**

The Chocolate Delights Candy Company needs to add the following functionality to its cash register: When a customer is checking out, the cash register needs to store the required data pertaining to each item the customer is buying. This data includes the item name, the price p...

**Quantum Physics**

Alice and Bob share a state a| + +> + b |- -> , where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants his qubit to end up in the state a |0> + b |1&...

**Calculus**

Evaluate [double intergal (R xy dA)] , where R is the region bounded by x^2 +y^2 <=16 , x>=0 and y>=0

**Integrals**

Evaluate è R xy dA , where R is the region bounded by x^2 +y^2 <=16 , x>=0 and y>=0

**Geometry**

ABC is a triangle with area equal to 20 . The incircle of triangle ABC has radius equal to 2 and the circumcircle of triangle ABC has radius equal to 6 . If sinA+sinB+sinC=a/b , where a and b are coprime positive integers, what is the value of a+b ?

**Geometry**

ƒ¡ is a circle with center O . A and B are points on ƒ¡ such that the sector AOB has perimeter 40 . What is the measure of ÚAOB (in radians) when the area of the sector AOB is maximized

**Trigonometry**

Let è be the angle between the x-axis and the line connecting the origin O(0,0) and the point P(−3,−4) , where 180<è<270. Given that sinè+cosè+tanè=−a/b, where a and b are coprime positive integers. What is the value o...

**MEchanics M-1 (Velovity time graphs)**

A dragonfly, at rest on a bullrush, decides to fly to a second bullrush 18 m away. It accelerates uniformly to a speed of. 5 m s-1, then immediately decelerates uniformly to rest on the second bulrish. Howlong the journey took?

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