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�� 573.�) (1+sin� )(1-sin� )�) (cos�-1)(1+cos� )�) cos^2�-sin^2�+1�) 1+...

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573.

�) (1+sin� )(1-sin� )

�) (cos�-1)(1+cos� )

�) cos^2�-sin^2�+1

�) 1+ sin^2�-cos^2�

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