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Answer - trigonometric equation - toya29 - 10-14-2016 12:19 AM
Hi. When i try to solve a trigonometric equation. I'm not sure how to receive the answers in terms of pi and n. for example:
solve(sin(x)=0) = {0, pi}
but i want receive {n*pi}
My firmware is 10637 (29/08/2016)
thanks .
RE: Answer - trigonometric equation - Steve Keeley - 10-14-2016 04:47 AM
Go into settings and turn off "Principal:"
RE: Answer - trigonometric equation - compsystems - 10-14-2016 05:05 AM
CAS Settings: Principal Solution: [OFF]
solve( sin(x)= 0, x) ;
[enter] returns
{n_0*π} // ok
but
Ans[1]|(n_0 = 1) not evaluated, Why?
.
RE: Answer - trigonometric equation - Han - 10-14-2016 03:41 PM
(10-14-2016 05:05 AM)compsystems Wrote: CAS Settings: Principal OFF
solve( sin(x)= 0, x) ;
[enter] returns
{n_0*π} // ok
but
(Ans[1]|(n_0 = 1)) not evaluated, Why?
This may be due to the priority of the | (where) operator. The (literal) expression "Ans[1]" does not contain any references to n_0 so that substitution does nothing. After evaluation of Ans[1], you get the unevaluated result because the evaluation of n_0 = 1 happened before the evaluation of Ans[1].
There was an old thread discussing this a while back...
RE: Answer - trigonometric equation - parisse - 10-14-2016 05:03 PM
You don't need | in CAS,
s:=solve(sin(x)=0);
s(1)(n_1=1)