no cal paper prep

Question 1

note: don’t skip steps

Question 2

when multiplying decimal by decimal, what is ans
(same thing for squaring)

Answer 2

-ans is lower than both individual numbers
eg. 0.2 x 0.3 = 0.06 (10 dp 10 dp = 100 dp

Question 3

12, 13, 14, 15 squared

Answer 3

144,169, 196, 225

Question 4

rules for surds

Answer 4

-simplify surds as much as possible
-always factorize surds if possible by making them a square number x something, then put the root number| surd
-if denominator has a surd, rationalize by multiplying fraction with the denominator surd/ denominator surd
-you can only multiply & divide surds with surds
-if you have a surd x number = number| surd

Question 5

unit circle:
-45, 45, 90 (isosceles triangle)
-hypotenuses is √2 ,rest is 1

Answer 5

SOH CAH TOA
-sin 45 = √2/ 2
-cos 45 = √2/ 2
-tan 45 = 1/1

Question 6

unit circle:
-30, 60, 90 (isosceles triangle)
-hypotenuse is 2, rest is 1 or √3

Answer 6

SOH CAH TOA
-sin 30 = 1/2
-cos 30 = √3/ 2
-tan 30 = √3/ 3
-sin 60 = √3/ 2
-cos 60 = 1/2
-tan 60 = √3