Level 8 Facts to memorise

Level 8 Facts to memorise - flashcards

Level 8 Facts to memorise

What does anything to the power of zero equal1
eg
50 = 1
h0 = 1
What does a number to the power of 1 equal?the number
eg
51 = 5
What does a negative power equal?The reciprocal.
ie turn it upsiode down.
What does 'power of a half' mean?square root
What does power of one third equal?cube root
What does power of one quarter equal?4th root
What is 'the difference of 2 squares'?a2 - b2 = (a+b)(a-b)
How do you solve a quadratic graphically?Draw the graph.
Write down the x values where the curve crosses the x axis.
What is the formula for perpendicular gradients?m1.m2 = -1
where the gradient of one line = m1 and the gradient of the other line = m2.
What is the gradient formula for parallel lines?m1 = m2
where m1 and m2 are the gradients of the two lines.
How do you prove that 2 triangles are congruent?SSS, SAS, ASA, AAS or RHS
What are congruent shapes?shapes that are identical in shape and size.
What is the formula for the Sin of angle 'a'?Sin(a) = Opp/Hyp
NB
   O
S H
What is the formula for the Cos of angle 'a'?Cos(a) = Adj/Hyp
NB
   A
   C   H
What is the formula for the Tan of angle 'a'?Tan(a) = Opp/Adj
NB
   O
   T   A

What is the made up word to help you remember the three trigonometric facts?

SOHCAHTOA

NB remember it as:

 O      A      O
S   H   C H T A
What is the formula for P(A or B)?P(A) + P(B)
What is the formula for P(A and B)P(A) x P(B)