Respuesta :

Answer:

A. √ 2

Step-by-step explanation:

cos(x) = adj/hyp

cos(45) = √ 2/1

cos(45) = √ 2

Answer:

B. 1/√2

Step-by-step explanation:

Soh Cah Toa

cos is adjacent over hypotenuse so from either 45° degree angle it is 1/√2