% B
% B displays a menu of all supported trigonometric functions (sin, cos, tan, sin-1, cos-1, tan-1). Select the trigonometric function from the menu and then enter the value. Set the desired Angle mode before starting trigonometric calculations.
Example Degree mode
|
Tan |
q < $ $ < - % B 3 45 E < |
|
|
Tan-1 |
% B 6 1 E < |
|
|
Cos |
5 V % B 2 60 E < |
|
Example Radian mode
|
Tan |
q " < - % B 3 g P 4 " E < |
|
|
Tan-1 |
% B 6 1 E < |
|
|
|
r |
|
|
Cos |
5 V % B 2 g P 4 " E < |
|
³ 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.
Reminder:
|
tan A = |
|
|
m±A + m±B + 90Ä = 180Ä therefore m±B = 90Ä - m±A
c = |
|
therefore 
|
q < $ $ " " < - % B 6 7 P 3 " E < |
|
|
90 U % i < |
|
|
b 3 F T 7 F < |
|
To one decimal place, the measure of angle A is 66.8Ä, the measure of angle B is 23.2Ä, and the length of the hypotenuse is 7.6 meters.