Question about Solve

08252015, 07:16 AM
(This post was last modified: 08252015 07:22 AM by salvomic.)
Post: #1




Question about Solve
hi,
an Italian student asked to me what's the best way to solve these equations in Solve: E1: A*(2*π*10)*COS(P)+11*A*SIN(P) = 0 E2: 11*A*COS(P)A*(2*π*10)*SIN(P) = 23 where A is amplitude, P phase, the rest 2*PI*frequency (here 10 Hz) I suggest only to set the Prime in DEG mode (he is to get something like 0.36 and 80°, he said). I get different values with different invite suggestion for A and P (but they are values MOD 360, I think), however also about 0 and about 99.93 (giving A=0.001); giving for A 2 and for P 0 I get about 0 and about 80 also... For examples the student got 20350160.0698 whit his tries: 20350160.0698 MOD 360 is about 280 (about 279.93), that's 36080... Whit my values (about 0.36 and 99.93) the equations are consistent but a negative amplitude hasn't a physic sense. But the guy is searching a general good solution if he doesn't know what invite values to give... Suggestions? Salvo ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

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Messages In This Thread 
Question about Solve  salvomic  08252015 07:16 AM
RE: Question about Solve  ww63  08252015, 10:27 AM
RE: Question about Solve  salvomic  08252015, 10:29 AM
RE: Question about Solve  roadrunner  08252015, 12:44 PM
RE: Question about Solve  salvomic  08252015, 12:47 PM
RE: Question about Solve  DrD  08252015, 02:00 PM
RE: Question about Solve  salvomic  08252015, 03:43 PM
RE: Question about Solve  DrD  08252015, 07:50 PM
RE: Question about Solve  salvomic  08252015, 07:52 PM

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