HP 40gs - Manual (Page 221)

Computer Algebra System (CAS) 14-39
Typing:
ACOS2S(ACOS(X) + ASIN(X))
gives, when simplified:
ASIN2C Transform the arcsin into arccos
ASIN2C has as a trigonometric expression as an
argument.
ASIN2C transforms the expression by replacing arcsin(x)
with − arccos(x).
Typing:
ASIN2C(ACOS(X) + ASIN(X))
gives, when simplified:
ASIN2T Transform the arccos into arctan
ASIN2T has a trigonometric expression as an argument.
ASIN2T transforms the expression by replacing arcsin(x)
with
Typing:
ASIN2T(ASIN(X))
gives:
ATAN2S Transform the arctan into arcsin
ATAN2S has a trigonometric expression as an argument.
ATAN2S transforms the expression by replacing
arctan(x) with .
π
2
---
π
2
-----
π
2
-----
arc
x
1 x
2
–
------------------
⎝ ⎠
⎜ ⎟
⎛ ⎞
tan
x
1 x
2
–
------------------
⎝ ⎠
⎜ ⎟
⎛ ⎞
atan
arc
x
1 x
2
+
------------------
⎝ ⎠
⎜ ⎟
⎛ ⎞
sin
hp40g+.book Page 39 Friday, December 9, 2005 1:03 AM