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Rewrite the expression in terms of cosine to the first degree |
2008-01-14 |
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Jamie pose la question : Hi. Im am having trouble with a problem on my math homework. I need help rewriting the expression in terms of cosine to the first degree.
(sinx)^4(cosx)^2 Harley Weston lui répond. |
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Two solutions using the law of sines |
2008-01-14 |
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Kate pose la question : I am working on the Law of Sines and I have a problem that says: Find a value for b so that the triangle has 2 solutions.
I am given that A = 36 degrees and a = 5. Now, I learned that for a triangle to have 2 solutions, h < a < b.
BUT...my answer key says the answer is: 5 < b < 5/sin 36. I can't figure out how to make this fit with h < a < b. Harley Weston lui répond. |
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Conditional probability |
2008-01-14 |
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Sara pose la question : Hello!
Ian has a photocopier in his office. If the photocopier is working on a certain
day then the probability that it will be working the next day is 0.9.
If the photocopier is not working on a certain day then the probability that
it will not be working the next day is 0.3.
The photocopier is not working on Monday.
(a) Calculate the probability that it will be working on Tuesday and Wednesday.
(b) Calculate the probability that it will not be working on Wednesday.
Could you please draw a tree diagram for this problem. Penny Nom lui répond. |
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x=sint, y=cos2t |
2008-01-14 |
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Art pose la question : How do i transform x=sint y=cos2t into a function in terms of x and y Harley Weston lui répond. |
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The surface area of a hemisphere |
2008-01-14 |
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Nicholas pose la question : the surface area of a hemisphere is 1062 cm2. What is the radius? Penny Nom lui répond. |
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The side of a heptagon |
2008-01-14 |
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Peter pose la question : Find the length of one side of each regular polygon.
heptagon with an apothem of 15mm and the area=758mm2 Penny Nom lui répond. |
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The sum of two numbers is 36 |
2008-01-14 |
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May pose la question : The sum of two numbers is 36.
Their product is 320.
What are the two numbers? Penny Nom lui répond. |
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How tall is the pole? |
2008-01-13 |
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Michael pose la question : If a 25 foot cable is attached to the top of a pole, and that cable
attaches to the ground ten feet away from that pole, how tall is the pole?
The 25 foot cable is the hypotenuse of a right triangle with a base of
ten feet. Leeanne Boehm and Penny Nom lui répond. |
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Oil in a tank |
2008-01-13 |
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tanakura pose la question : an oil tank contain 208.3 gallons of oil .whenever the amount of oil drops below 70 gallons,an alarm sound
.if 153.4 gallons are pumped into a delivery truck ,how many gallons must be pumped back into the tank in order to shut of the alarm? Penny Nom lui répond. |
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(303,000,000,000,303x3,300,000,033)/1,000,100,010,001 |
2008-01-13 |
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Adrian pose la question : Give the result of the following computation as an integer.
(303,000,000,000,303x3,300,000,033)/1,000,100,010,001
N.B. No calculators allowed Penny Nom lui répond. |
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1.2 as a fraction |
2008-01-12 |
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Confused pose la question : i have confused my brain and its driving me crazy i am trying to write 1.2 as a fraction but each time i do it i come out with a different number please help Penny Nom lui répond. |
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Five boys and two girls in a line |
2008-01-12 |
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pankaj pose la question : There are 5 boys and 2 girls.In how many ways can they stand in row so that no two girls are together? Penny Nom lui répond. |
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The cube of a number |
2008-01-12 |
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Sadie pose la question : can you help me to find out how to cube a number
example (6 cubed / by4) =54 what is cube or how do you cube something Penny Nom lui répond. |
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The perimeter of a figure |
2008-01-11 |
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Kassandra pose la question : I am trying to find out the perimeter of a semicircle. I do what the book says
but, I always get it wrong. I usually don't have problems with math until now.
There is half a circle. It shows that the radius of the circle is 4 units.
And then below the half circle there is a square below it. The angles are right angles
and the width is also 4 inches. I get close to the answer but, am usually off. Penny Nom lui répond. |
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The area of a sector of a circle |
2008-01-11 |
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Serenity pose la question : A denotes the area of a sector of a circle of radius r formed by the central angle theta.
Find the area A if r=10 meters and theta = 1/2 radians. Penny Nom lui répond. |
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