Deriving the double angle formulae (Example 24 to 26)

KSSM ADDITIONAL MATHEMATICS FORM 5 CHAPTER 6: Trigonometric Functions 6.5 Addition Formulae and Double Angle Formulae Deriving the double angle formulae Example 24 to 26

0:00 Title 0:05 Example 24 0:50 Example 25 1:44 Example 26

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