Section 5.5 – Right Triangle Trigonometry

a b c a b c 2 Decimal Places Nearest minute

a b c OPP ADJ HYP a b c OPP ADJ HYP SOH - CAH - TOA

Sides in A, B, C 2 Decimal Places Angles in D, E, F Nearest Minute

a b c 10 6 STO ALPHA A 8 STO ALPHA B 90 STO ALPHA F ALPHA A + B ENTER 10 STO ALPHA C

a b c opp adj 10 2nd tan ( A ENTER B 2nd angle 4 ENTER STO Alpha D ENTER

a b c 10 180 - ENTER ALPHA D F 2nd angle 4 ENTER

a b c 7.13 STO ALPHA B 11.77 C 90 F ALPHA C - B ENTER STO ALPHA A

a b c opp hyp 2nd sin ( B ENTER C 2nd angle 4 ENTER STO Alpha E ENTER

a b c 180 - ENTER ALPHA E F 2nd angle 4 ENTER

a b c 8.12 STO ALPHA A 71 2ND ANGLE 1 90 F 29 2 E 180 - ENTER ALPHA E F 2nd angle 4 ENTER STO Alpha D ENTER

a b c opp adj tan ENTER ALPHA A D STO Alpha B ENTER

a b c ALPHA A + B ENTER

a b c 4.71 STO ALPHA B 38 2ND ANGLE 1 90 F 29 2 E 180 - ENTER ALPHA E F 2nd angle 4 ENTER STO Alpha D ENTER

a b c opp adj tan ENTER ALPHA B D STO Alpha A ENTER

a b c ALPHA A + B ENTER