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b. Inverse Trigonometric Functions and Second Function
The yellow key in the upper left of the calculator marked " 2nd F " must be used to designate the
material appearing in orange above each key. When this key is pressed, the designation " 2nd F " will
appear in the upper part of the display. If you press this key in error, press it a second time and the
" 2nd F " designation will disappear.
Put the angular mode at " D EG "
Key in: (2nd F) Sin-1 .5 C=D
Answer:
30
(Remember to use the second function key to get the inverse)
Put the angular mode at " R A D "
Key in: (2nd F) Cos"1
GED
1
C=D
Answer:
3.141592654 (Value of
n )
13
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