Analysis and Approaches for IBDP Maths Ebook 2 | Page 69

Exercise 20
1. Given that π π
2 ��
� and 2
sin� � , find the exact value of sec4� .
3
[4]
2. Given that
3π
π ��
� and
2
3
cos� �� , find the value of tan 2� .
5
[4]
3. Given that
3
cos�
�sin�
� , find the value of sec4� .
2
[6]
4. Given that
(sec� � tan �) � � 2sec� tan�
and
2
2 3
3π
π ��
� , find the value of cot 2� .
2
[6]
7
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