Texas Instruments solar TI-36X - 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