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09142008, 05:48 PM  #11 (permalink) 
www.tituspb.com Join Date: Mar 2006 Location: The Group W Bench 
I thought this thread was going to be about needing help with a PB trigger. And I still hate math!
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09142008, 06:41 PM  #12 (permalink) 
The Furry Tailed One Join Date: Sep 2007 Location: Damn it's hot, Florida 
Thank you all for the help... I actually got through analytical geometry and I passed calculus this was all back in high school...thanks for the links as well I hope they work...My homework is due in 6 hours and 18 minutes...
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09142008, 09:55 PM  #13 (permalink) 
The Furry Tailed One Join Date: Sep 2007 Location: Damn it's hot, Florida 
Just a few left...Anybody?
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09142008, 10:14 PM  #14 (permalink) 
Bigger Balls Join Date: Sep 2006 Location: Atlanta, GA 
(I'm procrastinating my homework by doing yours... ) LarPreCalcAGA5 5.2.046.] Use the given function value(s) and trigonometric identities to find the indicated trigonometric functions. sec(θ) = 5, tan(θ) = 2√6 (a) csc(θ) = (b) cot(θ) = (c) cos(90° − θ) = (d) sin(θ) = EXAMPLE: Given sin(θ)=4/5 find the indicated trig. functions. Draw a right triangle on paper with the tip on the right and the 90* in the bottom right. Place θ in the bottom left corner. This is the triangle produced in the first quadrant of the circle. Now, we know that sin(θ) = Opp/Hyp. So, we know that the opposite side is equal to 4 and the hypotenuse is equal to 5. Using the Pythagorean Theorem we can find the length of the adjacent side. Now we can find all trig. functions for the triangle. cos(θ)=3/5 ; tan(θ)=4/3 ; csc(θ)=5/4 ; sec(θ)=5/3 ; cot(θ)=3/4 Note: Answers are not usually this clean. The 345 right triangle is a special case in which this exists. Given a calculator you can even solve for θ. If sin(θ)=4/5 then θ=sin^(1)(4/5) ~= 53 degrees. Note: sin^(1) is inverse sine.
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09142008, 10:34 PM  #15 (permalink) 
Bigger Balls Join Date: Sep 2006 Location: Atlanta, GA 
Find the radian measure of the central angle of a circle of radius r that intercepts an arc of length s. Radius r Arc Length s Central Angle 83 km 162 km You should know that for a slice of the circle, like a slice of cake, the radius is the distance from the center to the arc. If you cut your slice with angle θ and have a radius r, the length of the arc between your cuts is equal to θ in radians multiplied by the radius; S = θ*r. If you have your S and r values, then you can solve for θ by dividing both sides of the equation by r. Simplify the fraction if possible.
__________________ Last edited by Siress; 09142008 at 10:39 PM. 
09142008, 10:42 PM  #16 (permalink) 
more gooder 
t(angle)=S(arc length)/r ( radius) t=162/83 t=1.952 radians 180 degrees=Pi radians 1 radian = 180 degrees/pi 1.95 radians = 1.95 * 180 degrees/pi t=111.78 degrees
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09142008, 10:51 PM  #17 (permalink) 
more gooder 
That distance is 4042.18 because one is in the norther hemisphere, and one is in the southern. the equator is at 0 degrees. You have to add the angles together, not subtract them. Don't forget to convert the minutes to decimal...
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09142008, 10:55 PM  #18 (permalink)  
The Furry Tailed One Join Date: Sep 2007 Location: Damn it's hot, Florida  Quote:
Yes, I understand that...But, I don't understand how to figure it out with secant and tangent... And that is funny! Thank for pointing out one was north one was south...Owell I already submitted the answer. lets see...wait...secant hyp/opp which means the hyp is 5 and opposite side is 1 which means the adjacent side is sqrt (24) so that would mean all I have to do from there is plug them in?
__________________ MCB FeedBack Most people don't know that skittish is the proper spelling for "jittery". Don't believe me... Look it up.  
09142008, 10:58 PM  #19 (permalink) 
Bigger Balls Join Date: Sep 2006 Location: Atlanta, GA 
It's kind of neat switching between your questions and my own. Any way, last one I think? Find the distance between the cities. Assume that Earth is a sphere of radius 4000 miles and that the cities are on the same longitude (one city is due north of the other). City Latitude Johannesburg, South Africa 26° 8' S Jerusalem, Israel 31° 46' N Ok, this is our slice of pie from the cake. Southern angle of 26 degrees and 8 minutes, northern angle of 31 degrees and 46 minutes. The sum of these is our theta. So, theta is equal to 31 plus 26 degrees and 46 plus 8 minutes. For our formula of S = theta * r, theta must be in radians. You need to convert your minutes to degrees and from degrees to radians. Minutes are in base 60 and degrees are in base 10, so converting is as simple as dividing the amount of minutes by their base (60). Sum up all of your degree values and you have theta in degrees. To convert from degrees to radians, multiple by pi over 180 degrees. The degree units will cancel out and pi will remain; radians being in units of pi. Now you just multiply your theta radians by the radius and you have your distance.
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