Answer:
option c pair of linear equations in two variables
Answer:
Step-by-step explanation:
trig reminder
Use SOH CAH TOA to recall how the trig functions fit on a triangle
SOH: Sin(Ф)= Opp / Hyp
CAH: Cos(Ф)= Adj / Hyp
TOA: Tan(Ф) = Opp / Adj
Sin(0) = [tex]\sqrt{0}[/tex]/2 =0
Sin(30)= [tex]\sqrt{1}[/tex]/2 = 1/2
Sing(45) =[tex]\sqrt{2}[/tex] /2 =[tex]\sqrt{2}[/tex] /2
Sin(60)=[tex]\sqrt{3}[/tex]/2 =[tex]\sqrt{3}[/tex]/2
Sin(90)=[tex]\sqrt{4}[/tex]/2 = 1
Cos is exactly the same but counts backwards from 90°
Cos(90) = [tex]\sqrt{0}[/tex]/2 =0
Cos(60) = [tex]\sqrt{1}[/tex]/2 = 1/2
Cos(45) =[tex]\sqrt{2}[/tex] /2 =[tex]\sqrt{2}[/tex] /2
Cos(30) = [tex]\sqrt{3}[/tex]/2 =[tex]\sqrt{3}[/tex]/2
Cos(0) =[tex]\sqrt{4}[/tex]/2 = 1
