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Application of Derivatives of Trig Functions |
2009-05-21 |
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From Alannah:
I have a word problem from my Calculus textbook that I can't figure out.
Triangle ABC is inscribed in a semicircle with diameter BC=10cm. Find the value of angle B that produces the triangle of maximum area.
I am supposed to set up an equation for the area of the triangle A=b x h/2 using Trig functions based on angle B to represent the base and height but I'm not sure how to do this when the side length given is not the hypotenuse.
Answered by Janice Cotcher. |
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A box contains two white socks and two blue socks |
2009-05-20 |
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From Phu:
a box contains two white socks and two blue socks. Two socks are drawn at random. What's the probability that they are match the same color
Answered by Penny Nom. |
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The volume of a cone |
2009-05-20 |
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From Lillian:
okay! so my math question is about the volume of a cone! my work sheet gave me the volume and base of the cone and asked me for the height! please help me discover the height of a cone when the volume is 78.54 cm (cubed obviously) and the base is 6 centimeters. thanks so much :)
Answered by Penny Nom. |
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The width of a rectangle |
2009-05-19 |
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From Stacey:
If the length of rectangle is fixed at 29 cm, what widths will make the perimeter greater than 82 cm?
Answered by Penny Nom. |
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28 teams 14 lanes , 9 weeks no repeats |
2009-05-19 |
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From paul:
28 teams 14 lanes , 9 weeks no repeats
Answered by Karen Meagher. |
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(logx)squared + log (xcubed ) +2 =0 |
2009-05-19 |
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From michael:
Solve for x: (logx)squared + log (xcubed ) +2 =0
Answered by Penny Nom. |
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The ratio 3 to 4 to 5 |
2009-05-19 |
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From Josey:
The perimeter of a right triangle is 42 inches. If the lengths of the sides of the triangle are in the ratio 3 to 4 to 5, what are their lengths in inches?
Answered by Penny Nom. |
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An infinite geometric series |
2009-05-18 |
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From terri:
find the sum of the infinite geometric series
14 -7 +7/2 -7/4 +.....
A. 7007/13 B. 2002 C. 28/3 D.5005/7
Answered by Stephen La Rocque. |
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Two trains |
2009-05-18 |
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From chris:
Train A passes a station at 3:15am going 40mph. Train B passes the same station at 3:27am going 50mph. At what time will Train B catch up with Train A?
Answered by Stephen La Rocque. |
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Two equations |
2009-05-18 |
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From Bob:
solve the system:
x/2 - 2y= -8
3x + 2/3y= -10
Answered by Stephen La Rocque. |
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The sum of the angles of a triangle |
2009-05-18 |
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From mary:
prove that the sum of the three angles inside any triangle always add up to 180 degrees?
Answered by Harley Weston. |
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A sequence |
2009-05-18 |
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From Richard:
This is my question about sequences.
Write down the nth term of the following sequences.
1/2, -3/4, 9/8, -27/16
Plz help me solve the question!
Answered by Penny Nom. |
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4 tan(360/(2n)) |
2009-05-18 |
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From molly:
in the formula to find the area of any regular polygon how do you figure out 4tan part of the formula
Answered by Penny Nom. |
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Driving to school and back |
2009-05-17 |
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From marylyne:
suppose you are late for school and you drive from your house at a constant rate of 70 mph.when class is over, you drive home at a more leisurely 50mph. what is your average speed?
Answered by Penny Nom. |
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43200 cubic inches in gallons |
2009-05-17 |
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From Denise:
how many gallons are in a tank that has a volume of 43,200 cubic inches?
Answered by Penny Nom. |
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