Trigonometry - general physics 1

General Physics 1
Trigonometry
2 GENERAL TYPES OF TRIANGLE EXAMPLES:

1. Right triangle
90 degrees
Pythagorean theorem - law of sine and
cosine
2. Oblique triangle
non-right

PARTS OF A RIGHT TRIANGLE

Pythagorean formula:
hypotenuse 2
c 2 = a2 t b
hy
po
ten
opposite side




us
e(
lo n
ge
st
s id
e)

adjacent with respect to the origin

right angle



SOH CAH TOA PRINCIPLE

SOH - CAH - TOA
CHO - SHA - COA


s sine
d iu
ra


cosine unit circle
r=1




1. sine - is the ratio of 2. cosine - counterpart of
the opposite sinus
sinus x
y width/opposite of height
height cosine = adjacent
sine = opposite
hypotenuse
hypotenuse