Can someone help me with this please?

label Mathematics
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schedule 1 Day
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May 6th, 2015

Sin A = Cos (90-A), Cos A = Sin C

Please let me know if you have any questions and best me if you are satisfactory.

May 6th, 2015

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May 6th, 2015
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May 6th, 2015
Jun 28th, 2017
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