Find the cosine 315º. Round your answers to the nearest hundredth if necessary. 0 0.71 1 –0.78
2 answers:
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) =
Cos(315) = 0.70711.
Therefore,Cos(315) = 0.711.
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