Texas Instruments solar TI-36X - Page 23

21
Ti36eng1.doc TI-36X II Manual Linda Bower Revised:
01/10/03 10:47 AM Printed: 01/10/03 10:47 AM Page 21 of
48
³
Problem
Find angle
a in the right triangle below. Then find the
length of the hypotenuse
h and angle b. Measurements
of length and height are in meters. Round off results to
one decimal place.
Remember 3/7=tan
a , so a =tan
L
1
(3/7). Then 3/ h =sin a ,
so
h =3/sin a . Then 7/h=sin b, so b=sin
L
1
(7/h).
%t
1
e!
3
=
7
O
V
tan
-1
(3
ñ
7)
ß
23.2
FIX DEG
e%uOV
sin(Ans)
ß
0.4
FIX DEG
3
=%uV
3
ñ
Ans
ß
7.6
FIX DEG
e"
7
=%uOV
sin
-1
(7
ñ
Ans)
ß
66.8
FIX DEG
Angle a is about 23.2 degrees. The hypotenuse h is
about 7.6 meters. Angle
b is about 66.8 degrees.
3
a
b
h
7