1. A) 3. f-1-10 ) : 12.03.

21

=3 .

[41-101--48]
=3 -

¢-40) -

C-2) ]
=3 .
38
=
114

2. A) flkt-2.KZ -111k
b) -5=210 -111K
0=210 -111K-15
0=(214-1111515)
k= Yz -5 -

sequences
Arithmetic :

sn=n¥ geometric
:

common difference :d=tn tut -

or r=

general
:
tn=a+cn Dd -

Sn
-

É tu
-

- arm

sn=aY"- or sn=9I¥_
ex . ✗ -1273×-172×+1 ,
if the sequence is artnmetic

determine .
ex .

geometric sequence :
-4=-17 -4=1421-9, ,
ts= ?
3×-1-(4-12)=2×+1-(3×-1)
L¥= f- r3→ ¥g=r3 Y → =r
- -

>
-

11=5/3
hirer -
r
Ñ÷=r -15=-7-1 . -

4- = I

e. X .
-13=12 , -18=-18
How many terms in the
-15=1
determine the 5th term ex .

sequence
12 -_
At 2d A) -3 2,7 ,
. . .
422
,

-18=9+701 1-5=0 ¥¥
D= -6 422=-3-1 In -

1) (5)
425=57-5
n=86
22 23
321£
-1
b) 24,8 , ,
. . .
ta=arn
¥ ,¥ 2549
""

(25119--212)
-1-11
295 =
zn
295=2 "
n=98
Trigonometry
of all triangle 180°
sum angles in a
•

of -1 b2=(2
Atb =D
au
✗ job
Atb -15-180
Ñ+=l80 A-
hypotenuse
f-
opposite
h
r j a- adjacent
>
i r

tangent sine cosine

tano-a-sino-n-coso-ane.se
.

a
B
find
length of AB
OPP

a
135
12
'
°

A
tan -65 )=F¥
b
tank 5) 12=1-13
•

adj AB= 8.4

SOHCAHTOA
d. *
angle
SOH →
sinful sinx
Sino
CAH →
costa
TOA →
tanta