HP 40gs User Manual page 221

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