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Trig Examples
(Cont’d)
Example 2 — Sin A:
Solve angle A of the offset below, if the two known sides are:
Side a = 8 Inches
Side c = 25 Inches
In this case, use the trigonometry formula:
Sin = Opposite/Hypotenuse or Sin A = a/c
a) Longhand/Use Sine Formula:
KEYSTROKE
DISPLAY
o o
0.
8 ÷ 2 5 = Ç S
18.66292°
(18.7°)
b) Use Pythagorean Theorem Keys:
KEYSTROKE
DISPLAY
o o
0.
8 r
Y 8.
2 5 d
R 25.
p
/
_Ø 18.66292°
(18.7°)
