Respuesta :
Answer:
Cos(315) = 0.711.
Step-by-step explanation:
Given : cosine 315º.
To find : Round your answers to the nearest hundredth.
Solution : We have given that cosine 315º.
Cos x = Sin (90- x).
Then
Cos ( 315) = Sin(90 -315)
Cos(315) = Sin (-225)
By the property Sin(-x) = -Sin(x)
Cos(315) = -Sin (225)
Cos (315) = [tex]\frac{\sqrt{2}}{2}[/tex]
Cos(315) = 0.70711.
Therefore,Cos(315) = 0.711.
