[CAS] ABS EXPAND new cmd - Printable Version +- HP Forums ( https://www.hpmuseum.org/forum)+-- Forum: HP Calculators (and very old HP Computers) ( /forum-3.html)+--- Forum: HP Prime ( /forum-5.html)+--- Thread: [CAS] ABS EXPAND new cmd ( /thread-7989.html) |

[CAS] ABS EXPAND new cmd - compsystems - 03-21-2017 05:03 AM
solve((r^2) = ((r*sin(x)-4)^2),r); returns { (4/(sin(x)-1)), (4/(sin(x)+1)) } Early transcendentals by Dennis G. Zill and others ... book show r^2 = (r*sin(x)-4)^2 √(r^2) = √((r*sin(x)-4)^2) r = +(r*sin(x)-4) or r = -(r*sin(x)-4) r-r*sin(x) = -4 or r+r*sin(x) = -4 r*(1-sin(x)) = -4 or r*(1+sin(x)) = -4 r = -4/(1-sin(x)) or r = -4/(1+sin(x)) You can see the importance ABS EXPAND command, which is available in the CLASPAD400 And I wish please, that Bernard can also include him in the xCAS. |