HP 49g Graphing Calculator - Manual (Page 124)

Exponential and trigonometric expressions
Wlien working with expressions involving exponential and trigonometric
functions, you often need to simplify them before you use FACTOR or
EXPAND. The following commands, from the exponential and
linearization category, simplify trigonometric and exponential
expressions. At the beguming of each description, the keys you use to
access the command list are displayed.
EXPLN Exp and Lin command list—
Applies Euler identity. The
example at the right shows
the result of applying the
command to sin(x).
R«i fiVZ HEK C= 'S'
iHdHEJ
: expln ( sini : x »
EXPC i 'X)-
HALFTAN Trigonometry commaird
list—(i
LIN
Replaces sin(a:), cos(a’), and tan(a:) temis with terms that
use tan-.
2
Exp and Lin command list—0@H)
Performs Euler identities, then Imearizes expressions by
applying the following substitutions:
RSD KVZ HEK C=
iHdHEI
; lin ( sind :»
-(•l-.EXPi: i .x)|+-|-'EXP(-i: i .X»
e ■ e e
, ^ «A-
(e ) e
The example at the right
shows the result of applying
the command to sin(a:).
LNCOLLECT Exp and Lin conunand list—0 ®N)
Simplifies an expression by collecting teians involving
natiual logarithms.
SINCOS Trigonometry command list—0iT0
Converts exponential and natural logarithmic
expressions to trigonometric expressions.
Page 5-14 Working with expressions