Maths

Question 1

Sin*

Answer 1

opp/hyp

Question 2

Cos*

Answer 2

adj/hyp

Question 3

Tan*

Answer 3

opp/adj

Question 4

Simple interest

Answer 4

I=PRT/100

Question 5

Compound interest annually

Answer 5

t

A=P(1+r)

Question 6

Compound interest n times a year

Answer 6

nt

A=P(1+r/n)

Question 7

Area of triangle

Answer 7

A=0.5 x base x height

Question 8

Area of circle

Answer 8

2

A=Pi x r

Question 9

Area of a Parallelogram

Answer 9

A= base x height

Question 10

Area of a trapezium

Answer 10

A= 0.5 x (a+b) x height

Question 11

Volume of prisms

Answer 11

V= area of base x height

Question 12

Volume of pyramid

Answer 12

V= 1/3 x area of base x height

Question 13

Curved surface of cylinders

Answer 13

= 2 x pi x r x h

Question 14

Total surface of cylinders

Answer 14

2

= 2 x Pi x r x h + 2 x Pi x r

Question 15

Volume of cylinders

Answer 15

2

V= Pi x r x h

Question 16

Curved surface of a cone

Answer 16

= Pi x r x s

Question 17

TSA of a cone

Answer 17

2

= Pi x r x s + Pi x r

Question 18

Volume of cone

Answer 18

2

V= 1/3 x Pi x r x h

Question 19

TSA of sphere

Answer 19

2

= 4 x Pi x r

Question 20

Volume of sphere

Answer 20

3

V= 4/3 x Pi x r

Question 21

Gradient

Answer 21

Y  — Y
        2      1
=   ———————
      X   — X
        2        1

Question 22

Distance

Answer 22

= square root of
2 2
(Y — Y ) + (X — X)
2 1 2 1

Question 23

Midpoint

Answer 23

X + X Y + Y
1 2 1 2
= ——————— , ——————
2 2

Question 24

Equation for functions & graphs

Answer 24

Y= MX + C

Question 25

2nd Equation for functions & graphs

Answer 25

-b
= ———
2a

Question 26

Index law 1

Answer 26

m n m+n

a x a = a

Question 27

Index law 2

Answer 27

( m ) n mxn

( a ) = a

Question 28

Index law 3

Answer 28

n n n

(ab) = a b

Question 29

Index law 4

Answer 29

-n 1
a = ———-
n
a

Question 30

Index law 5 , 0 law

Answer 30

0

a = 1

Question 31

Pythagoras’s theorem

Answer 31

2 2 2

c = a + b