CPM Homework Help : A2C Problem 12-133

Answer (a):

Answer (b):

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Hint (c):

Where is this angle on the unit circle?

Hint (d):

Where is this angle on the unit circle?

Hint (e):

Where is this angle on the unit circle?

Hint (f):

Where is this angle on the unit circle?

Hint (g):

What special points do all of these values correspond to?