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#419 [
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cosX+sinX=ã2{(1/ã2)cosX+1/ã2)sinX}
=ã2{cos(ƒÎ/4)cosX+sin(ƒÎ/4)sinX}
=ã2sin{X+(ƒÎ/4)}
:11/02/13 22:57
:SH06B
:gg66/HCI
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