Respuesta :

MisterBrian

Answer:

4:5

Step-by-step explanation:

Cos ∅ is a trigonometrical ratio between base and hypotenuse.

  • Here,base refers to the side on which theta resides.
  • Hypotenuse is the side opposite to 90°

Clearly if we consider theta as S, then S resides on RS,and the side opposite to 90° is DS.

So,

  • RS = 12 = base
  • DS = 15 = hypotenuse

Hence

  • cos∅ = RS/DS = 12/15= 4/5 = 4:5

Answer:

Cosθ = 12/15, θ = 36.9°

Step-by-step explanation:

SOH CAH TOA

Cosθ = [tex]\frac{Adj}{Hyp}[/tex]

Cosθ =[tex]\frac{12}{15}[/tex]

θ= Arccos(12/15)

θ=36.9°

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