∫OE∠ BOC ∴∠COE=∠BOE.

* Equal share ∠AOC ∴∠AOF=∠COF

∴∠COF=∠EOF+∠BOE

∠EOF=(90 -∠AOF)+∠BOE

=(90-∞COF)+∞BOE

=(90 -∠EOF-∠BOE)+∠BOE

=90 -∠EOF

∴2∠EOF=90

∴∠EOF=45