CIE A Level Maths: Pure 3復(fù)習(xí)筆記3.2.2 Double Angle Formulae

Category: A-level課程, 教材筆記, 福利干貨 Date: 2022年8月19日下午3:48

Double Angle Formulae

What are the double angle formulae?

The?double angle formulae?are derived from the 'A+B' versions of the?compound angle formulae:

Double Angle Forms Illustr 1_sin, A Level & AS Maths: Pure revision notes ? Double Angle Forms Illustr 2_cos, A Level & AS Maths: Pure revision notes ? Double Angle Forms Illustr 3_tan, A Level & AS Maths: Pure revision notes

Exam Tip

The double angle formulae can be found in the formulae booklet – make sure you know where to find them.
Look out for problems containing sinAcosA or an equation that contains both a double angle and a single angle.