Trig: how do I even start?
Am I supposed to make A the subject? Is this about the compound angle formula to expand the cos part?
(edited 8 months ago)
Original post by Bookworm524
Am I supposed to make A the subject? Is this about the compound angle formula to expand the cos part?
Sure, since we have and this allows you to reduce the problem to only .
See if you can apply some trig identities thereafter to get rid of the cosine.
Original post by RDKGames
Sure, since we have and this allows you to reduce the problem to only .
Ooooh thanks! Silly me forgot triangles have total 180 degrees only
OK, so I put sin(A/2) as sin(90-(B-C)/2) and applied the compound angle formula. Oh and cos90 is zero
Wait now I ended up with cos((B-C)/2) = cos((B-C)/2)
Wait now I ended up with cos((B-C)/2) = cos((B-C)/2)
Hmmm
Original post by Bookworm524
Hmmm
Hmmm
Well that just looks confusing …. Here is how to start … i’m off to bed so good luck
Original post by RDKGames
Well that just looks confusing …. Here is how to start … i’m off to bed so good luck
thank you!!
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