Measurement and Trigonometry

Question 1

angle of depression

Answer 1

angle looking down

Question 2

angle of elevation

Answer 2

looking up

Question 3

angle of inclination

Answer 3

used when dealing with ramps or slopes = angle of elevation

Question 4

the point (x,y) on the terminal ray

Answer 4

R= squre root of x² + y²

Question 5

reference angle

Answer 5

actual angle between the terminal ray and the x axis (can be found by subtracting angle from 180)

Question 6

sin angle =

Answer 6

x/R or x/1

Question 7

cos angle =

Answer 7

y/R or y/1

Question 8

Sine Law

Question 9

Cosine Law