Below are the values you can enter on a TI-30 Calculator to solve right triangles. The chart will work with other calculators but you may have to change the order you enter the data. For example in item #1 below you might enter OPP/HYP = SIN INV. If you need to solve right triangles on a regular basis you will appreciate this memory jogger and eliminate mistakes.
Trigonometry - Right Triangle Cheat Sheet Table.
|
TO FIND |
KNOWN |
ENTER ON TI-30 Calculator |
|
ANG |
HYP & OPP |
OPP/HYP = INV SIN |
|
ANG |
HYP & ADJ |
ADJ/HYP = INV COS |
|
ANG |
OPP & ADJ |
OPP/ADJ = INV TAN |
|
OPP |
ANG & HYP |
ANG SIN * HYP = |
|
OPP |
ANG & ADJ |
ANG TAN * ADJ |
|
OPP |
HYP & ADJ |
HYP (X SQUARED) - ADJ (X SQUARED) = (SQUARE ROOT OF X) |
|
ADJ |
ANG & HYP |
ANG COS * HYP = |
|
ADJ |
ANG & OPP |
OPP/ANG TAN = |
|
ADJ |
HYP & OPP |
HYP (X SQUARED) - OPP (X SQUARED) = (SQUARE ROOT OF X) |
|
HYP |
ANG & OPP |
OPP/ANG SIN = |
|
HYP |
ANG & ADJ |
ADJ/ANG COS = |
|
HYP |
OPP & ADJ |
OPP (X SQUARED) + ADJ (X SQUARED) = (SQUARE ROOT OF X) |