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1 - 8 Simplify and find the exact value: 1. tan100 + tan 80 cos50 cos10 - sin50 sin10 2. 1- tan 100 tan 80

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1 - 8 Simplify and find the exact value: 1. tan100 + tan 80 cos50 cos10 - sin50 sin10 2. 1- tan 100 tan 80 5TT sin- 5TT tan 80 - tan 35 3. 12 COS-+ COS 12 12 12 4. 1 + tar 80 tan 35 5. 3 COS - - COS-2 4T sin T 6. cos -cos 12 12 - sin 12 12 7. sin76 cos310 - cos76 sin310 8. cos40 cos50 - sin40 sin50 9 -16 Determine the exact value, simplifying completely. 9. sin2850 10. tan 750 5 TT 11. tan - 12 . 12. COs 1050 11TT 13 sin- 12 14. COs 150 15. Sin150 16. tan 165 0

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