Analysis and Approaches HL Practice Paper Book | Page 23

www . seprodstore . com 11 � Trigonometric identities : 1 . sin tan cos � � � � 2 . 2 2 sin cos 1 � � � � � Double angle formula : 1 . sin 2 2sin cos � � � � 2 . 2 2 2 2 cos 2 2cos 1 1 2sin cos sin � � � � � � � � � � � � ASTC diagram y x 13 ^Trigonometry