Re: [Maxima-discuss] how to get sec, csc, cot instead of reciprocals of cos, sin, tan

[Henry B. <hb...@pi...>]

Re: non-normalized:

For example, if you have a 2x2 orthogonal matrix -- e.g., matrix([cos(t),sin(t)][-sin(t),cos(t)]) --
then matrix([c,s],[-s,c]) will do most of what you want even if c^2+s^2 isn't equal to 1.

Any attempt to keep c,s normalized will blow up the symbolic calculation for not much benefit.

At 08:14 AM 3/11/2021, Raymond Toy wrote:
>>>>>> "Henry" == Henry Baker <hb...@pi...> writes:
>    Henry> Over the past 10 years, I've done a *lot* of manipulations
>    Henry> with sin/cos/tan and
>    Henry> trigexpand,trigreduce,exponentialize,rectform, etc.
>
>[snip]
>
>    Henry> 3. tan is often a 'shorthand' for a ratio of non-normalized
>    Henry>    sin's & cos's. If by converting to tan's, you can get rid
>
>What does "non-normalized" mean here?