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Half Yearly Exams! (1 Viewer)
- Thread starter subjectiv
- Start date
SoulSearcher
Active Member
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- 2007
1/tan x = cot x, 1/sin x = cosec x and 1/cos x = sec x, thats pretty much it.basketcase89 said:
lol, good luck anyway.m0ofin said:
greycats
Mister Monday
wtf does all that mean :/ <3 general mathsSoulSearcher said:
FranzFerdinand
Member
i want my results now.
basketcase89
I've got a sunset
Yeah the textbook could have told me those ratios.
How do I apply them to mathematical problems?
How do I apply them to mathematical problems?
SoulSearcher
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Ok, say you have this question:
Solve cosec x = 2 for 0 < x < 360
now we know that cosec x = 1 / sin x
therefore 1/sin x = 2
multiply both sides by sin x, 1 = 2 sin x
therefore sin x = 1/2
therefore x = 30, 150, as the angle is positive only in the first and second quadrants.
More simply put, revert those trig functions to functions of sin, cos or tan ratios, then solve.
Solve cosec x = 2 for 0 < x < 360
now we know that cosec x = 1 / sin x
therefore 1/sin x = 2
multiply both sides by sin x, 1 = 2 sin x
therefore sin x = 1/2
therefore x = 30, 150, as the angle is positive only in the first and second quadrants.
More simply put, revert those trig functions to functions of sin, cos or tan ratios, then solve.
I had my half yearlies last week and this week. I stuffed maths up big time cause i had a mental blank during the exam so i got under 80 percent for sure. Agriculture and economics were pretty easy. I still have to do english, physics and chem which i need to cram for -_-.
SoulSearcher
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I would have if I paid the money.
FranzFerdinand
Member
ah. crap. forgot to pay my 4 bux for the maths comp :mad1:yoakim said:
yeah (it was wednesday) i did but there was some mix up with mine and i ended up getting a yr 12 answer sheet instead. grr.yoakim said:
there's also the maths competition this thursday. right on my day off as well.
did some stupid mistakes in my half yearlies...so painful! damn me and my mental blanks - i walk out of the hall to realise that i did something wrong.
only physics and maths 3u left...gotta do well in those to make up for everything else
Forbidden.
Banned
science owns ! everything is science .... matter, motion, you name it !airie said:I don't
Nesty
Proud TB =)
grr half yearlies last week and this.. eco and history exam tomorrow.. how fun
dun like weekends.. give me a false sense of security as tho i dun needa study.. this is crap
dun like weekends.. give me a false sense of security as tho i dun needa study.. this is crap
basketcase89
I've got a sunset
Yes. My school pays for us (although we have to pay it back later i.e. before the end of the year) so we don't have to worry about getting money in on time. I found the science competition quite difficult... some of the questions that were asked required knowledge from parts of the syllabus that my school hasn't yet covered.yoakim said:
FranzFerdinand
Member
unless it's an essay on the history of lead nitrate :rofl:subjectiv said:
/end lameness.
chocolate_lover
...
A bit late into this thread, but i have my half-yearlys in week 5ish.
Also, my school is doing a different science competition to most of u, the "Rio Tinto Science Competiton" AND i have to pay $4.40 for it!! But since im a good girl (lol!) ive paid for it.
Also, my school is doing a different science competition to most of u, the "Rio Tinto Science Competiton" AND i have to pay $4.40 for it!! But since im a good girl (lol!) ive paid for it.