how can I simplify sqrt(1-sin(x)*sin(x)) to |cos(x)|
Subject: how can I simplify sqrt(1-sin(x)*sin(x)) to |cos(x)|
From: Stavros Macrakis
Date: Fri, 22 Sep 2006 10:06:12 -0400
> I an new to maxiam, how can I simplify sqrt(1-sin(x)*sin(x)) to |cos(x)|
Unfortunately, there is no completely automatic way to do this, but
here are a couple of approaches.
expr: sqrt(1-sin(x)*sin(x))$
substpart(trigsimp(piece),expr,1);
Simplifies the part within the sqrt.
substpart(trigrat(piece),expr,1);
Simplifies the part within the sqrt.
trigrat(radcan(exponentialize(expr)));
Convert to exponential form, simplify the exponentials, and
convert to trigonometric form.
There are other approaches to try in other cases as well....
-s