I'm a 50+ year old American, of british decent... I never managed to remember the 'american' mnemomic, but my dad taught me one the used to use in England aroun

I'm a 50+ year old American, of british decent... I never managed to remember the 'american' mnemomic, but my dad taught me one the used to use in England around WWII: Percy has a bald head, poor boy Perpendicular/hypotanuse = Sin Base / Hypotanuse: CoSin Perpendicular / Base: Tan edit: try to fix the HN god awful formatting