Law of Sin by HP

08032018, 06:08 PM
Post: #3




RE: Law of Sin by HP
(08032018 05:59 PM)Albert Chan Wrote: I just peek at your link, A, B, C are sides, X, Y, Z angles. I'd say A² + B² = C² + 2AB cos(Z) Or C² = A² + B² – 2AB cos(Z) (08032018 05:59 PM)Albert Chan Wrote: So, for right angle Z, A^2 + B^2 = C^2, as expected That's also true for the correct formula. ;) Regarding the screenshot on the linked site: The formulas refer both to the law of cosines (the three equations at the top) and the law of sines (smaller, right of the triangle), but here sides and angles have been swapped. It should read sin(X)/A = sin(Y)/B = sin(Z)/C. So this looks like an error. Dieter 

« Next Oldest  Next Newest »

Messages In This Thread 
Law of Sin by HP  acoto  08032018, 05:46 PM
RE: Law of Sin by HP  Albert Chan  08032018, 05:59 PM
RE: Law of Sin by HP  Dieter  08032018 06:08 PM
RE: Law of Sin by HP  Albert Chan  08032018, 08:32 PM
RE: Law of Sin by HP  Albert Chan  08032018, 06:22 PM
RE: Law of Sin by HP  acoto  08032018, 07:40 PM
RE: Law of Sin by HP  acoto  08032018, 08:36 PM

User(s) browsing this thread: 1 Guest(s)