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Mathematics 20 Online
OpenStudy (anonymous):

Question will be posted shortly.

OpenStudy (anonymous):

OpenStudy (loser66):

this is the link and attachment is the part you need. just switch a little bit and don't forget sin(-x) =- sin (x) . that explains the minus sign in the front of the proof

OpenStudy (anonymous):

Thank you so much!

OpenStudy (loser66):

np

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