Explicación paso a paso:
Cos135=Cos(90+45)
Cos135=Cos90.Cos45-Sen90.Sen45
Cos135= 0.Cos45-1.√2/2
Cos135=-Sen45= -√2 / 2
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Explicación paso a paso:
Cos135=Cos(90+45)
Cos135=Cos90.Cos45-Sen90.Sen45
Cos135= 0.Cos45-1.√2/2
Cos135=-Sen45= -√2 / 2