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# sin? ( 75 0) Sin (450 ) cos* (360) sin? (450 + 30) Sin ( 45 ) (053/ 20) [ sin (459) cos ( 30) + (os 145 ) sin(30. Sin( 45

Find the exact value of the following:

a)

These are my attempts. Please show all work.

- Attachment 1
- Attachment 2