Texas Instruments MathPrint TI-30X Pro - Page 29

cos
-
5 V Y g P 4 " )
<
- r
³ Problem
Find angle A of the right triangle below. Then calculate angle B and the length of the
hypotenuse c. Lengths are in metres. Round results to one decimal place.
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 + 7
2 2
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 <
Math Functions 25