gilbert189 — 11/12/2022, 11:17:16 AM

my little brother has discovered the rule of cosines by himself

♥ 2 ↩ 0 💬 4 comments

comments

pkmnq:

now i have no excuse to be absolutely clueless about trigonometry

11/12/2022, 2:04:16 PM
lily:

wtf how

like the sine rule, that one’s easy, a over sin A is equal to b over sin B, etc

but the cosine rule, while it makes sense, is a lot more complicated than just 3 fractions equaling

11/12/2022, 12:10:39 PM
cst1229:

cosine rule: cosine(x) = sine(x + 90°), probably

11/13/2022, 7:51:23 PM
lily:

that’s not the one i was thinking of

11/13/2022, 9:59:57 PM