Module 7 Unit 1

Question 1

What are the six trigonometry ratios

Answer 1

Sin(op/hyp), cosec(hyp/op), tan(op/adj), cot(adj/op), cos(adj/hyp), sec(hyp/adj)

Question 2

What is the importance of the unit circle and it’s four quadrants

Answer 2

The unit circle is a circle placed on a coordinate system of axis and a radius of one. When a coordinate on the circumference is placed it forms a right triangle. The four quadrants show us where the trig values will be negative and positive

Question 3

Which mnemonic is used to remember the signs of the functions

Answer 3

A.S.T.C
all functions
Sec & cosec
Tan & cot
Cos & sec

Question 4

How is right angled triangles solved with trigonometric functions

Answer 4

When working with trigonometric functions there are three variables as long as you have 2 you can simply solve for X

Question 5

How do you solve unkown height questions with trig

Answer 5

Unkown height questions are simply trig functions where the missing variable is the unkown height

Question 6

What is meant by a co-function

Answer 6

A co-function is simply the inverse of its function e.g. cosec is simply the inverse of sin

Question 7

What is meant by a vertice

Answer 7

A vertice is the corner of a triangle

Question 8

What is the importance of a reference angle

Answer 8

A reference angle Is the angle that you choose to define the ratios in a triangle. This defines which sides are op and which side is adj