Keep a digital copy of the manual on your phone. Practice the programming examples weekly. And before your next HKDSE mock exam, do a full memory reset.
Use sin , cos , tan , and their inverses ( SHIFT + function). casio fx-50fh ii user manual
? → A : ? → B : ? → C : (B² - 4AC) → D : (-B + √D) ÷ (2A) → X ◢ (-B - √D) ÷ (2A) → Y Keep a digital copy of the manual on your phone