Respuesta :

cosine is the x value out of the radius. cosine0=1, cos180=-1
so in this case, y=180= π in radian
abidemiokin

The angle y whose cosine is -1 is π

How to find the cosine of an angle

From the information, the angle y whose cosine is−1 and which is in the interval [0, π] can be written as:

  • cos y = -1

Determine the value of y

cos y = -1

Take the sin invers of both sides

arccos y = arccos(-1)

y = arccos (-1)

y = 180 degrees = π

Hence the angle y whose cosine is -1 is π

Learn more on cosine of angles here: https://brainly.com/question/26407253

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