Memory

Question 1

The CosSin rule?

Answer 1

a ² = b ² + c ² - 2bcCosA

Question 2

The Quadratic Formula?

Answer 2

x= -b ± √b ² - 4ac
——————
2a

Question 3

What formula would you use to find the area of a non- right angled triangle?

Answer 3

1/2 abSinC

Question 4

What are all the cos values?
(0-90)

Answer 4

Cos0- 1

Cos30- √3 / 2

Cos45- √2 / 2

Cos60- 1 / 2

Cos90- 0

Question 5

What are all the Sin values?
(0-90)

Answer 5

Sin0- 0

Sin30- 1 / 2

Sin 45- √2 / 2

Sin60- √3 / 2

Sin90- 1

Question 6

Volume of a pyramid?

Answer 6

1 / 3 x Base area x Height

Question 7

Trigonometry does not work on what type of triangle?

Answer 7

Trigonometry does not work on right angled triangles.

Instead use the sin rule or 1/2abSinC

Question 8

What do the following symbols mean in Venn diagrams?

• U

• ∩

• ’

• ξ

Answer 8

• Union (U): All elements in either set or both sets.

• Intersection (∩): All elements in both sets.

• Complement (’): All elements not in the set.

• Universal Set (ξ): The set of all possible elements.

Question 9

What are all the Tan values?
(0-60)

Answer 9

Tan0- 0

Tan30- 1/ √3

Tan45- 1

Tan60- √3