Mathematics, 22.12.2020 02:00, hanjonez

PLEASE HELP ASAP!! a coil of wire rotating in a magnetic field induces a voltage e=20sin(πt/4 - π/2). Use an identity to express this in terms of cos πt/4. (Please show your work as well)

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PLEASE HELP ASAP!! a coil of wire rotating in a magnetic field induces a voltage e=20sin(πt/4 - π/2...