Analysis and Approaches for IBDP Maths Ebook 1 | Page 92

Your Practice Set – Analysis and Approaches for IBDP Mathematics
Chapter
10
Trigonometry
SUMMARY POINTs
�
�
�
Trigonometric identities:
1.
2.
sin�
tan�
�
cos�
2 2
sin � �cos � � 1
Double angle formula:
3. sin 2� � 2sin� cos�
4.
cos 2 2cos 1 1 2sin cos sin
2 2 2 2
� � � � � � � � � � �
2 tan�
5. tan 2�
�
2
1 � tan �
ASTC diagram
S (90� ��
�180 �)
sin�
� 0
cos�
� 0
tan�
� 0
T (180� ��
� 270 �)
sin�
� 0
cos�
� 0
tan�
� 0
y
A (0� � � � 90 �)
sin�
� 0
cos�
� 0
tan�
� 0
C (270� ��
�360 �)
sin�
� 0
cos�
� 0
tan�
� 0
x
84
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