Externals
What are the three rules?
Chain, Quotient and Product
How many equations do we need to have planes intersecting?
3
Who gave Mrs Lloyd her new watch?
Her daughter (for mothers day)
What does sin equal?
Opposite over Hypotenuse
What brand are Mrs Lloyds boots?
R.M Williams
Differentiate: f(x)=x2
2x
A rectangle’s length and width add up to 20 meters. The area is 96 square meters. What are its dimensions?
Length = 12 m, Width = 8 m (or vice versa)
What is Mrs Lloyds favourite sport?
Netball
TRUE OR FALSE
sin2x+cos2x = 1
TRUE
How many friends do you need?
ONE
Differentiate:
f(x)=x2+3x+Netflix
f′(x)=2x+3
(Netflix is a constant — and like all constants, it disappears when things get serious.)
Two numbers multiply to 24. The sum of their squares is 58. What are the numbers?
x≈6.73,y≈3.57
Where is Mrs Lloyd from?
Somwhere around Gore
What is the easiest way to solve trig equations?
By just using the triangles of course
What does a sine wave say when life knocks it down?
“Don’t worry, I’ll be positive again soon.”
Which rule would you use for a fraction?
Quotient Rule
x+y=4
x2+y2=10
FIND XY
xy=3
What was one thing Mrs Lloyd studied at university?
Botany, Zoology and Maths
In which quadrant is tan positive?
3rd
Why was 6 afraid of 7?
Because 7,8,9
Differentiate the following function using the product rule:
f(x)=(x2+1)(lnx)
2xlnx+x+x/1
The sum of two numbers is 15. When one number is squared and added to twice the other number, the result is 54. Find the two numbers.
The two numbers are either (6,9)(6, 9)(6,9) or (−4,19)(-4, 19)(−4,19).
Harriet and Elizabeth
2cos2(x)−1=0
=±1/(square root of two) ⇒x=45∘,135∘,225∘,315∘
What came first - Dishwashers or Mrs Lloyd
Dishwashers! Invented 90 years ago :)