Author 
Message 
jonos

Posted: Wed Feb 18, 2004 6:25 pm Post subject: cos and sin 


i have seen these used a lot, and if its not too much trouble, could someone please explain these and what they do. im only starting grade 10 math, so i don't know. 





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Paul

Posted: Wed Feb 18, 2004 6:54 pm Post subject: (No subject) 


They're used in trig, you can use them in solving for parts of a triangle if certain other parts are known. I think only in right angeled triangles:
sin(angle) = opposite / hypotenuse
cos(angle) = adjacent / hypotenuse
haven't reached that unit yet, remebered from some book 2 summers back... that I was made to study... 





Tony

Posted: Wed Feb 18, 2004 7:06 pm Post subject: (No subject) 


Sin/Cos/Tan are ratios formed between the sides of the triangle in relation to an angle. If you know an angle and 1 side, you can find all other sides using trig.
Sin/Cos/Tan functions are applied to the right angle triangle, but you can use special ratios in any triangle.
a^2 = b^2 + c^2  2bc CosA
where a,b,c are the sides and A is the angle opposite of the side a
also
SinA/a = SinB/b = SinC/b 
Tony's programming blog. DWITE  a programming contest. 




jonos

Posted: Wed Feb 18, 2004 7:27 pm Post subject: (No subject) 


thanks for explaining it, but is there any where where i could get a more simpler definition/use 





Tony





shorthair

Posted: Wed Feb 18, 2004 9:25 pm Post subject: (No subject) 


its hte final unit in math , it makes the course relaxing after quadratices, good way to end hte year / semester ... trignometry is fun and good for programming 





Tony

Posted: Wed Feb 18, 2004 9:55 pm Post subject: (No subject) 


trig is neccessary for programming
lol, quadratics... that's the easy stuff... just wait till calculus 
Tony's programming blog. DWITE  a programming contest. 




shorthair

Posted: Wed Feb 18, 2004 10:02 pm Post subject: (No subject) 


in in funtions and relations right now , caculus isnt that dificult ( begginers 0 i was looking at it online couple weeks ago the coursse in grade 12 dosent go very indepth 





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Tony

Posted: Wed Feb 18, 2004 10:07 pm Post subject: (No subject) 


well at first its advanced functions... you don't get into the real calculus for a while...
but apparently its really useful in physics pass highschool 
Tony's programming blog. DWITE  a programming contest. 




Catalyst

Posted: Wed Feb 18, 2004 10:08 pm Post subject: (No subject) 


calculus isnt that hard (it still is fairly hard tho) 





shorthair

Posted: Wed Feb 18, 2004 10:10 pm Post subject: (No subject) 


i quite like functions , i love number secuences aswell in math , the fibionacci geometric and arithmeic i have found very useful 





octopi

Posted: Thu Feb 19, 2004 12:45 am Post subject: (No subject) 


Calculus was hard.
Algebra is hard.
I love both of them
Data Management is a boring pain in the neck. 





Catalyst

Posted: Thu Feb 19, 2004 7:04 am Post subject: (No subject) 


well said 





AsianSensation

Posted: Thu Feb 19, 2004 7:51 am Post subject: (No subject) 


octopi wrote: Data Management is a boring pain in the neck.
that's why you take it in gr 11 so you won't be bored as much as you would in gr 12. But's Finite is a good course to take, very useful in solving problems. Yeah, I know, with computer science, you could just write up a program and do a probability question by repeatedly running that program, but the matrices and probablity theory you learn is not bad at all, and very very useful. 





apomb

Posted: Tue Feb 24, 2004 6:43 pm Post subject: (No subject) 


I was wondering if Geometry/Discrete Math is useful for programming ... and if it is / not ... what does it teach you ? 





