HP 15c - Manual (Page 268)

268 Function Summary and Index
Trigonometry
D Sets decimal
Degrees mode for
trigonometric
functions—indicated by
absence of GRAD or
RAD annunciator (page
26). Not operative for
complex trigonometry.
R Sets Radians
mode for trigonometric
functions—indicated by
RAD annunciator (page
26).
g Sets Grads mode
for trigonometric
functions—indicated by
GRAD annunciator
(page 26) Not operative
for complex
trigonometry.
[, \, ]
Compute sine, cosine,
or tangent, respectively,
of number in display
(X-register) (page 26).
, , {, /
Compute arc sine, arc
cosine, or arc tangent,
respectively, of number
in display (X-register)
(page 26).