Trigonometry
X Y Z (multi-tap keys)
Pressing one of these multi-tap keys repeatedly lets you access the corresponding trigonometric or inverse trigonometric function. Set the Angle mode - Degree or Radian - before your calculation.
Example in Degree Mode
|
tan |
- q < - Z 45 ) < |
|
|
tan-1 |
- Z Z 1 ) < |
|
|
cos |
- 5 V Y 60 ) < |
|
Example in Radian Mode
|
tan |
- q " < - Z g P 4 " ) < |
|
|
tan-1 |
- Z Z 1 ) < |
|
|
|
r |
|
|
cos |
- 5 V Y g P 4 " ) < |
|
|
|
- r |
|
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 = |
|
therefore m±A = tan-1 |
|
|
m±A + m±B + 90¡ = 180¡ therefore m±B = 90¡ - m±A
c = |
|
Note: Set mode to DEGREE and fix 1 decimal place for the calculations.
|
q < $ $ " " < |
|
|
- Z Z 7 P 3 " ) < |
|
|
90 U % i < |
|
|
% b 3 F T 7 F < |
|
|
r |
|
|
q < $ $ " " < |
|
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.