9.2.12 Transforming arctan into arccos
The atan2acos command
transforms any atans in an expression to acoss, using the identity
| arctan(x)= | | −arcsin | ⎛
⎜
⎜
⎜
⎜
⎝ | | ⎞
⎟
⎟
⎟
⎟
⎠ | . |
-
atan2acos takes
expr, an expression containing inverse trigonometric functions.
- atan2acos(expr) returns
expr with any atans replaced by the appropriate
acoss.
Example
|
| |
| | −arccos | ⎛
⎜
⎜
⎜
⎜
⎝ | | ⎞
⎟
⎟
⎟
⎟
⎠ |
| | | | | | | | | | |
|