MAT244--2019F > Term Test 1

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Victor Ivrii:
You may post solutions to Test 1. All solutions posted before this announcement were removed (all of them seem to be  prepared in advance).
One user who was too smart for his/her own good (posted several times something like a single digit to stake out the lot) got a posting ban.

Please type sin, cos, log, ...  as \sin, \cos , \log , ... to produce $\sin (x)$,... (upright and with a proper horizontal spacing)