Why was the mathematician late for work? Use double angle identities to simplify each expression. Write the letter that corresponds to each answer in the space below matching the question number. sin 20 6. (sin + cos 0) 2 2 sin 0 sin 20 2. sin 20 sec 7. 2 sin e 2 tan 8 3. 2 sin 6+ cos 28 8. 1+ tan Answer Letter 2 sin 9 B cote sir. 28 +1 2 tan 9 1 cos 29 sin 0 sin 20 Cose 9. (cos + sin 6)(cos 8 - sin 8) tan e 2 sin 28 5. sin 20 10. (tan 28) (1-tan ) 2tan 0 cos28 EHK MORSTU 6 1 8 9 9 10 8 6 1 7 6 9 3 2 5 4