HP-71B Enhanced Math LEX

[J-F Garnier]

(01-10-2020 05:01 PM)Albert Chan Wrote:  >SINH(ASINH((.5,0))
ERR:Invalid Expr
>SIN(ASIN((.5,0))
ERR:Invalid Expr

There is a missing closing ) in each of your expressions :-)

Quote:>DEGREES
>ASIN(.5)
30
>ASIN((.5,0))
(.523598775598,-0)
>SIN(RES)
(.5,-0)

Trig/hyperb/log/exp functions with complex arguments always use radians as unit.
This is consistent with other HP calculators/computers.
Only the ARG , POLAR and RECT functions are using the current angle mode.

Thanks for your feedback !

J-F