PHED-2116EL Study Guide - Midterm Guide: Hypotenuse
25 Jun 2018
School
Department
Course
Professor
SOHCAHTOA
q
cosθ = adjacent / hypotenuse
sinθ = opposite / hypotenuse
tanθ = opposite / adjacent
adjacent
opposite
θ = cos-1(adjacent / hypotenuse)
θ = sin-1(opposite / hypotenuse)
θ = tan-1(opposite / adjacent)
OR
Abccba cos*2
222
Baccab cos*2
222
Cabbac cos*2
222
If any of the angles A,B or C are right
angles (90˚) the the equation is
simplified to
222
cba
Figure 1: Law of cosines
A
C
B
b
c
a
d = Sf -Si
∆t = tf -ti
∆d = df -di
∆v = vf -vi
v = ∆d/∆t
a = ∆v/ t
Constant velocity
Sf = Si + vi∆t
d = vi∆t
Constant acceleration
vf = vi + at
vave = (vf + vi ) / 2
d = vit + ½at2 à Sf = Si + vit + ½at2
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