Casio FX-300ES PLUS

0.707106781230 15
press after the argument to close the parentheses may cause
unwanted values or expressions to be included as part of the argument.
Example: (sin 30) + 15 (Angle Unit: Deg)
Older (S-V.P.A.M.) Model: 30 15 15.5
Natural Textbook Display Model:
(LineIO) 30 15 15.5
Failure to press here as shown below will result in calculation of sin
45.
63