An Inspector Calls fully annotated Grade 9 analysis line by Line

Sine and Cosine Rule
Trigonometry
up to now has mainly to right angled triangles
However it can be used on triangles that are not rightangled using 2
important rules

Sine Rule Cosine Rule
C
Capital Angles
lowercase sides opposite
angles
b a
7




A Y B
sine Rolen
C
SinA Sin B h
B a

b sint h a sinB

b n
a a sin B b sin A
SinA InB
ggg
7 MEAN

g C p
b signB since
a c
sinA sinB sine
or Sint

, Sine and Cosine Values
Sine 00 0 sine 90 1
Cosine00 1 Cosine 900 0

tangent 0 0 900 Math Error
Tangent


558 5 sin 45 Sin 600
Cos 300 Cos 450 Cos 600 I
at I
tan 300 I tan ago tan 600 3
OSH ACH JA
Joo
Tso
2 2
1 My
B A

1600 450C
1
2 10

453 6 HE
60 x
Sin Go
4
H
90
601
A