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Trigonometric prob

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math
the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...

stats
a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...

TRIGONOMETRY
Write the following trigonometric expression as an algebraic expression in x free of trigonometric or inverse trigonometric functions sin(cos^-1 x) -1≤x≤1

Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) d...

Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan Q = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) ...

statistics
Use the normal dist to approx the desired prob. Find the prob of getting at most 30 fives in 200 tosses of a fair 6 sided die

Math
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees - Q) d...

Statistics
How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..

data management gr.12
In a bag there are 8 red jelly beans and 7 green jelly beans. The 4 jelly beans are randomly chosen from the bag without replacement. a)create a probability distribution table for choosing red jelly beans b)what is the probability that at least 2 chosen jelly beans are green ...

Math
How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"

Trigonometric prob.
Hi, my question is attached to the web below (picture), because I can't draw the diagram on here. Sorry for any inconvenience. Please help and thanks. imageshack . us/photo/my-images / 845 / img0043gx . jpg/ Sorry, the web address is spaced out so you need to put it together.....

Trigonometric Expressions
Simplify and write the trigonometric expression in terms of sine and cosine: tanxcscx= 1/f(x) What does f(x)=

math
State a trigonometric ratio that is equivalent to each of the following trigonometric ratios Sin 3pie/10 Cos 6pie/7

Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. Sorry for the mistake. They are two separate functions and i need...

math- algebra- help please!
3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5

Linear algebra
In a medical prognosis model, there are three states for a person: well, ill and dead. We are given that the prob. one states well given that the person is well is 0.3. The prob. one becomes ill given that one is well is 0.5. The prob. one states ill given that one is ill is 0...

algebra
Prob.1: -14=2x+2x-2 Prob.2: 5x=50

math 10
determine the value of the three primary trigonometric ratios i have triangle in front of me but what am i looking for? what is trigonometric ratios?

Trig.
I really need help so please help. write the first trigonometric function in terms of the second trigonometric function. sec x; tan x

Trigonometric Identities
Which of the following are trigonometric identities, I have narrowed it down to two - (cscx + cotx)^2 = 1 OR sin^2(x)sec^2(x) + 1 = cot^2(x)csc^2(x)

math please help?! studying for test!!
If x = 9tanθ, use trigonometric substitution to write square root 81 + x^2 as a trigonometric function of θ, where -pi/2 < θ < pi/2

math help?!
If x = 6sinθ, use trigonometric substitution to write square root 36-x^2 as a trigonometric function of θ, where where 0<θ< pi/2

Trig
In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

Statistics
DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.

Probability and Statistics (Continuation)
Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth trial? MY answers: a) P...

STATISTICS
PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...

statistics
PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...

statistics
Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is the prob. that more ...

Prob & Stats
A medical researcher gave 100 patients a new drug to see if it reduces their blood pressure? Did the new drug reduce the patients' blood pressure? Write your hypothesis mathematically. Not sure how to do this, Prob & Stats has been quite a struggle for me

Finance
Assuming that the returns from holding small-company stocks are normally distributed, what is the approximate probability that your money will double in value in a single year? What about triple in value. Many of my classmates have an expected return of 17.6% and a standard ...

ECON! Please help!
Joe: y= 100 (High) prob = 2/5 =25 (medium) prob= 2/5 =0 (low) prob = 1/5 Calculate: 1. José’s risk premium, p, associated with farming and 2. José’s certainty equivalent associated with farming. The village decides to implement an informal insurance (risk sharing) ...

statistics
Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...

Stats
nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...

Trigonometric Functions
Determine the Value of all six trigonometric functions of theta when given? I need help. This is for my midterm review, if anyone is willing to help, I'd appreciate it. a) sin theta= 3/5 and theta is in quadrant 1. b) tan theta= -2 and theta is in quadrant II c) sec theta = 2 ...

Trigonometry
I don't understand how I'm supposed set the problem up or what theta is... Use the given function value(s), and trigonometric identities (including the cofunction identities), to find the indicated trigonometric functions. sec theta = 5, tan theta 2 * 6^1/2 a) cos theta b) cot...

Calculus 2
Evalute the integral of x/(x^2+4)dx using u-substitution and then trigonometric substitution. I did this and got (1/2)ln(x^2+4)+C using u-substitution and x^2+4+C using trigonometric substitution. What did I do wrong??? thank you for helping!

math
dale placed six cARDS IN A BAG.QONE CARD IS LABELD 1,TWO CARDS ARE LABELD2,AND RTHREE CARDS ARE LABELD 3.FIND THE PROBABILITY OOF PICKING TWO CARDS IN THE ORDER OF THE NUBERS LISTED TH EFIRST CARD IS RETURNED BEFORE THE SECOND IS PICKED ..... P,(1,2) P(3,NOT1) p(NOT2,2) P(1,3...

trigonometric identities
Prove the following trigonometric identities 1. tanx = sinx + sin^2x/cosx(1+sinx) 2. cos^3+(cosx)(sin^2x) = 1/secx

Trigonometric Substitution
Trigonometric Substitution a. Explain why the substitution x = asin(Theta) guarantees that cos(Theta) is greater than or equal to 0 . b. What sort of restriction must we put on x and a so that the substitution x = asec(Theta)will guarantee that tan(Theta) is greater than or ...

circular (trigonometric) functions
hi, i need help solving this trigonometric equation: sinx+3cosx=0 i don't know what to do as i can't just diviide the two to create tanx which is what i have been doing in previous questions... yes, you are on the right track sinx = -3cosx sinx/cosx = -3 tanx = -3 so x must be...

trig
find the reference angle of -20000 and express the six trigonometric functions of -20000 in terms of the six trigonometric functions of its reference angle.

Pre-Cal
Write the trigonometric expression in terms of sine and cosine, and then simplify. 1). (csc θ − sin θ)/(cos θ) ____________. 2). Simplify the trigonometric expression. (cos u + 1)/(sin u) + (sin u)/(1 + cos u) ______________.

stats again
ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...

algebra
another prob(last one) 6x-7x=18

Prob/Stat
If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?

quantum
prob 2 ans please?

math prob
how many midsegments does a triangle have?

math
so the prob of drawn an ace or spade is 4/52

chemistry
So i if do 4 x250/100 i will get the answer for the prob?

Math Prob
ok for changing the base of a log from 10 to e is there a formula?

Pre-Calc
I am really struggling with how to do these problems, I posted them a few minutes ago but the answers/work shown was incorrect. 1) a) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos 18° − sin 12° ...

SPELLING PLEASE help
the prob is: middle : center :: thinner : s _ _ _ _er

PROB
What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

Prob
What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

trigonometry
(a) If è is in standard position, then the reference angle è is the acute angle formed by the terminal side of è and the ---Select--- x-axis y-axis . So the reference angle for è = 120° is è = ?°, and that for è = 210°is è = ? degrees. (b) If è is any angle, the ...

MATH Prob.
How many different ways can a teacher line up 5 students for lunch?

stats & prob.
Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.

Math- Prob Stat
How do you determine if a raffle or casino game is fair?

probability!
we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that someone who ...

tRiG/ AlGeBrA
1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4

Pre-Calc
1) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos 18° − sin 12° sin 18° And Find its exact value. 2) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of ...

prob.
If it is given that P(A)=1/3 and P(B/A)=2/3 (the dividing sign is ment to be a vertical bar), what is P(A and B). I got .07. Is this correct? If it isn't, why not?

MATH Prob.
How many three-symbol codes can be formed from the letters I, S, P, and Y without repetition?

trig
1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4

MATH Prob.
Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??

MATH Prob.
What is the expected value of one 700 tickets in a raffle for a prize of $1400?

trigonometric
2 cos x - 1 =0

MATH Prob.
how many three letter symbols can be formed from the letters A,C,K,L, & M without repetition? so far I have 12

Algebra 2: Prob and Stats
Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625

Trigonometry
what is the trigonometric form of z=1+i?

MATH Prob.
if you have two fair dice that are rolled, what is the probability of a sum 6 given that the roll is a 'double'?

MATH Prob.
What are the odds in favor of getting at least one head in three successive flips of a coin?

MATH Prob.
There are 6 contestants in a singing competition. How many different ways can first, second, and third place be awarded?

precalculus
put this in trigonometric form: -3-i

trig
What is the trigonometric notation for 3-3(sqrt3i)?

precal
identify the trigonometric form of -6+6i

Trigonometry
What does a trigonometric value represent?

Prob and Stats
In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56

Calculus
I'm having difficulty figuring #2 of this prob;em. I'm utterly clueless. Can someone explain it? Please and thank you. y=x 2. List the roots of the function.

PLEASE HELP - DIVISORS PROB
What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.

math
what is the ffive trigonometric function of sin =2/5 ?

math
find the value of the trigonometric functions

Trigonometry
How do you express sin4x as a trigonometric function of x?

math
to find of trigonometric ratios of angles 60

trig
Graph this trigonometric function. y=-4cos(x/2+3.14)+1

Trigonometry
what is z= -2-2square root of 3i in trigonometric form.

chem
I am having a hard time with the following : 50 g HCl + 50g Ca(OH)2=H2O+? amt of CaCl2? I don't know how to set this prob. up.Please HELP!Thank you in advance....

math
am having prob..wv zs numb..given that f(x)=x+6/2x,find f(4) and f inverse(x) am not sure abt the answer the frst 1,i get 1.25 and the second oneeee i dnt knw hw to do it

MATH Prob.
How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?

mathematic
a bag contains 3rdmarbles, 2white and 3green a boy takes at one marble at random. what is the prob that it is either red or white?

trig
what is the correct answer in trigonometric identities. DiViDE ; x^5 + 5x^4 - 2x^3 + 3x^2 + 2x + 1 by x + 3

Calculus 2
find the integral of x/(x^2+4)dx using trigonometric substitution.

math
find the 6 trigonometric functions of tan (-3/8): sin < Ø

Math
Find in terms of trigonometric function of x Tan(90° + x)

Calculus AB
What are the six trigonometric functions of 2010 times pi?

math prob
Twelve people attend the first meeting of the Star Wars Club. They exchange e-mail addresses. How many exchanges take place?

Math
state the primary trigonometric ratio associated with angle a p(-2,5)

math
The trigonometric function sin(-8 x) is equal to one of following:

maths
Express sin 2x cos 4x as a sum of trigonometric functions.

maths
Express sin 2x cos 4x as a sum of trigonometric functions

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