Trigonometric Operations - HP -11C Owner's Handbook Manual

Section 3: Numeric Functions 45
Trigonometric Operations
The six basic trigonometric functions operate in the trigonometric
mode you select.
Trigonometric Modes. Selecting a specific trig mode does not
convert any number already in the calculator to that mode.
Selecting a specific trig mode is simply telling the calculator what
unit of measure (degree, radian, or grad) to use when executing a
trig function.
Pressing selects the Degree trig mode. No annunciator
appears in the display.
Pressing selects the Radian trig mode. While mode is
set, the RAD annunciator appears in the display.
(9][RAD] 0.0000
RAD
Pressing (9] selects the Grad trig mode. While mode is
set, the GRAD annunciator appears in the display.
(9](GRD] 0.0000
GRAD
The calculator is always set to one of the three trig modes.
Continuous Memory maintains the last trig mode selected, even
when the calculator is turned off, then on again. If a power loss
occurs, or if you reset Continuous Memory (refer to page 20), the
calculator will automatically reset to mode.
Trigonometric Functions.
Pressing Calculates
sine
(9][SIN arc sine
cosine
(g][cos arc cosine
tangent
(9][TAN arc tangent