HP 49g+ User Manual
Page 244
Page 7-14
5
[ a ]
a:5 is listed in the top left corner of the display.
3
[ b ]
b:3 is listed in the top left corner of the display.
5
[ c ]
c:5 is listed in the top left corner of the display.
To solve for the angles use:
„
[
α ]
Calculator reports
Solving for α
, and shows the result
α:
72.5423968763
.
Note: If you get a value that is larger than 180, try the following:
10
[
α ]
Re-initialize a to a smaller value.
„
[
α ]
Calculator reports
Solving for α
Next, we calculate the other two values:
„
[
β ]
The result is
β:
34.9152062474 .
„
[
γ ]
The result is
γ:
72.5423968763
.
You should have the values of the three angles listed in stack levels 3 through
1. Press + twice to check that they add indeed to 180
o
.
Press L to move to the next variables menu. To calculate the area use:
„
[
A ]. The calculator first solves for all the other variables, and then
finds the area as A:
7.15454401063.
Note: When a solution is found, the calculator reports the conditions for the
solution as either Zero, or
Sign Reversal
. Other messages may occur if the
calculator has difficulties finding a solution.
Pressing
„@@ALL@@ will solve for all the variables, temporarily showing the
intermediate results. Press ‚
@@ALL@@ to see the solutions: