Orion TI-
30XS MultiView™ User’s Guide - User guide
Version 1.0
Orbit Research
Confidential and Proprietary Information
26
Problem
Find angle A of the right triangle below. Then calculate angle B and the length of
the hypotenuse c. Lengths are in meters. Round results to one decimal place.
The right triangle ABC has a right angle labeled C, positioned at the lower-left
side of the triangle. Angle A is at the top-left and angle B at the lower-right side.
The lengths of the sides are AC=3, CB=7, and AB=lower case c.
Reminder:
tan A = 7/3 therefore
m
∠
A = tan
-1
(7/3)
m
∠
A +
m
∠
B + 90° = 180°
therefore
m
∠
B = 90° −
m
∠
A
c = √3
2
+7
2
mode, down arrow, down arrow, right arrow, right arrow,
enter
Result = 1
clear, 2nd, [tan
-1
]
,
7
,
n/d
,
3
,
right arrow, ), enter
Result =
66.8
90
,
−, 2nd, [ans], enter
Result = 23.2
2nd, [√]
,
3
,
x
2
, +
,
7
,
x
2
, enter
Result = √58
[left-right arrow]
Result = 7.6
To one decimal place, the measure of angle A is 66.8°, the measure of angle B is
23.2°, and the length of the hypotenuse is 7.6 meters.
3.19 Hyperbolics
2nd [hyp]
2nd [hyp]
displays the
HYP
indicator and accesses the hyperbolic function of the
next trigonometry key that you press. Angle modes do not affect hyperbolic
calculations.
