yolo tengo
Active Member
- Joined
- Sep 2, 2022
- Messages
- 211
- Gender
- Female
- HSC
- 2024
Let me give you hints so you get this question by yourself. Note I skimmed over the Q, this isn't a sol but moreso a method of trying find sols by yourself.View attachment 38510
how do i do this question? i know i’m supposed to use the compound angle formula but like how…
idk how to use latexI encourage @synthesisFR @Pethmin or anyone else to post a solution here, I think a good way of improving in maths esp. in this forum is just trying to explain how things work.
Though I'd highly encourage @yolo tengo to retry the question and possibly find a sol by himself.
just use a latex generator or just type it without latex it doesn’t matter that muchidk how to use latex
Just tried like 9 times (i did this in du like last yr) but I think I've only learnt how to do it with the same trig function not two like the one yolo is stuck onI encourage @synthesisFR @Pethmin or anyone else to post a solution here, I think a good way of improving in maths esp. in this forum is just trying to explain how things work.
Though I'd highly encourage @yolo tengo to retry the question and possibly find a sol by himself.
yeha im stupid i forgot i could just use that identity idk why i derived itan alternative method of approaching this q rather than the more conventional (for hsc at least) method that has already been mentioned, is to note that arcsinx + arccosx = pi/2, then simply add the two equations together.
thanks bro also i'm a girlI encourage @synthesisFR @Pethmin or anyone else to post a solution here, I think a good way of improving in maths esp. in this forum is just trying to explain how things work.
Though I'd highly encourage @yolo tengo to retry the question and possibly find a sol by himself.
yea it's an established identity, just cos it's not on the ref sheet doesn't mean you can't, they omit a few anywayPs are u allowed to quote that identity? bc its not on the reference sheet
Yeah, its good to just memorise obscure identities such as these because it comes in handy if you can save time on questions such as these. I see a lot of exam markers do this where they have a conventional question but tweak it in a manner such that students who went the extra mile to learn an identity are rewarded.yea it's an established identity, just cos it's not on the ref sheet doesn't mean you can't, they omit a few anyway
ill do this question later, did too many inverse trig questions and my brain got friedYeah, its good to just memorise obscure identities such as these because it comes in handy if you can save time on questions such as these. I see a lot of exam markers do this where they have a conventional question but tweak it in a manner such that students who went the extra mile to learn an identity are rewarded.
I would also try learning about arctan(x) + arctan(1/x) identity and other stuff like that, being familiar with such trig relations will be sooo handy esp. for integration later on.
do u have like a formula list of what ur allowed bc sometimes i feel like i might lose marksYeah, its good to just memorise obscure identities such as these because it comes in handy if you can save time on questions such as these. I see a lot of exam markers do this where they have a conventional question but tweak it in a manner such that students who went the extra mile to learn an identity are rewarded.
I would also try learning about arctan(x) + arctan(1/x) identity and other stuff like that, being familiar with such trig relations will be sooo handy esp. for integration later on.
No the HSC reference sheet is good enough. You don't need to memorise obscure formulas, if you do go past them its good to just keep a memory of them just in case.do u have like a formula list of what ur allowed bc sometimes i feel like i might lose marks
for examples the area of a minor segment i always derive by doing sector - triangle but some ppl just memmorise the formula?
wat abt 4uNo the HSC reference sheet is good enough. You don't need to memorise obscure formulas, if you do go past them its good to just keep a memory of them just in case.
If you're doing proof I think you got to be thorough else for normal Qs im sure its fine. For secx, im pre sure u can just integrate it normally? I don't think you need to show that stepwat abt 4u
like integrating secx can i just state it or do i have to do times the top and bottom by secx + tanx and then rev chain it?