HP HP-20S - Trigonometric Modes and Functions; Changing the Trigonometric Mode

Pressing (][] displays the value of =. Although the dis-
played value is rounded to the current display format, the
12-digit value is actually used.
Example: Surface Area of a Sphere. Find the surface area of a
sphere with radius=4.5 inches (surface area = 47r?).
Keys: Display: Description:
4 (x](e] 3.1416 Displays .
459 =] 20.2500 Displays 4.52.
(=) 254.4690 Surface area in square
inches.
Trigonometric Modes and Functions
Changing the Trigonometric Mode
The trigonometric mode determines how numbers are in-
terpreted when using the trigonometric and coordinate
conversion functions.
34 3: Numeric Functions