Texas Instruments solar TI-36X User Manual
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
L1
(3/7). Then 3/h=sin a,
so h=3/sin a. Then 7/h=sin b, so b=sin
L1
(7/h).
% t 1 e ! 3 = 7 O
V
tan
-1
(3
с7)
Я
23.2
.1:
,-/
e % u O V
sin(Ans)
ß
0.4
.1:
,-/
3
= % u V
3
ñAns
ß
7.6
.1:
,-/
e " 7 = % u O V
sin
-1
(7
ñAns)
ß
66.8
.1:
,-/
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