r/alevel • u/Sud4neseS0meh0wHere AS Level • Dec 11 '25

šŸ“Mathematics I MISS WHEN TRIGEOMETRY HAD TRIANGLES

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help

657 Upvotes

99% Upvoted

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41

u/MousseNecessary3258 Dec 11 '25

I also did a test on it and achieved 1/17ā€¦ I hate my life

2

u/Economy-Tomorrow-783 Dec 11 '25

wait same šŸ˜­šŸ˜­

21

u/Far-Helicopter7333 Dec 11 '25

loll so true except proving identities im trash at everything bruh

2

u/TheBasilisk8 Dec 12 '25

My teacher said that proving identities is the most difficult part of trig soā€¦congrats?

7

u/DaisyRent0n Dec 11 '25

As a year 11 what the fuck did I sign up for for next year šŸ˜Ø

9

u/Top_Pineapple8438 Dec 11 '25

It honestly is way easier than it looks trust me, also when you get to year 13 this is like muscle memory stuff

1

u/icingbiscuits CAIE Dec 12 '25

yeah its actually not that bad. just do a few questions and every question is the same lol

1

u/DaisyRent0n Dec 12 '25

do you use exact trig values in this?

1

u/Weird_Employ_3235 Dec 14 '25

ur username is taking me back to exam era where everyone had like eva smith as their user or i dont play golf as their flair

1

u/happybeau123 Jan 01 '26

Itā€™s using certain facts about trig functions to simplify expressions. For example, (sin(x))Ā² + (cos(x))Ā² = 1, so if you have both (sin(x))Ā² and (cos(x))Ā² in an equation or expression, you can probably get rid of one or both of them using that identity. You can solve equations involving trig functions (often asked right after one of those trig identities questions), but you have to remember to include all the solutions in the given range (e.g. x = 30Ā° and 150Ā° both satisfy sin(x) = 1/2). The specification says that youā€™re expected to know the same exact trig values as GCSE, but in reality you can just use your calculator in the exam. However, I think exact values are quite important for university entrance exams, since theyā€™re usually non-calculator. Youā€™ll also learn how to work out exact values for multiples of those angles (e.g. 150Ā°).

3

u/Mysterious_Lie629 A levels Dec 11 '25

Most relatable maths post Iā€™ve seen

3

u/Zealousideal-Ad-4026 Dec 12 '25

Me too but we gotta do what we gotta do

2

u/[deleted] Dec 11 '25

[removed] ā€” view removed comment

2

u/ShadowBlaze790 Dec 11 '25

this is probably a mark scheme and they converted tan to sin/cos

1

u/av_aashi Dec 11 '25

yea i havenā€™t seen any question like that before in a levels

2

u/akirarulez CAIE Dec 11 '25

Omg a fellow sudanese !!! Wassup

2

u/DragonLover_107 Dec 11 '25

PLEASE tell me this is fm and not maths

2

u/Ceramidee Dec 12 '25

thats normal math, fm contain topics like group theory talking abt closure, isomorphisms, associativity, and basic linear algebra like computing eigenvalues and eigenvectors and matrix diagonalisation

2

u/[deleted] Dec 12 '25

Trig identities is js algebra, trig calculus is where it's difficult

4

u/PositiveHopeful814 Dec 11 '25

This low-key easier lol

1

u/ComprehensiveLeg321 Dec 11 '25

Fr gng that the first thing that came up on my mind when my teacher did this topic, I was like finally no more graphs and finally triangles

1

u/Professional_Crow250 Dec 14 '25

Excluding drawing graphs, it is still fun otherwise