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2. Given cos ( 7 12) determine an equivalent expression in terms of the related acute angle. a) − ( 6 ) b) −cos ( 5 12) c) − cos ( 12) d) − cos ( 4 )

3) Determine an equivalent expression in terms of the related acute angle for cos ( 17 12 ). a) − ( 6 ) b) −cos ( 5 12) c) − cos ( 12) d) − cos ( 4 )

2 Given cos 7 12 determine an equivalent expression in terms of the related acute angle a 6 b cos 5 12 c cos 12 d cos 4 3 Determine an equivalent expression in class=

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