In Exercises 13-24, find the exact value of each expression. 13. sin(45° – 30°) 14. sin(60° – 45°) 15. sin 105° 16. sin 75° 17. cos(135° + 30°) 18. cos(240° + 45°) 19. cos 75° 20. cos 105° 21. tan 22. tan .3 4 4 23. tan 3 24. tan 3 4 4

Q: 10. Sec -405 degrees 12. Cot -90 degrees 14. cos 360 degrees  16. sin -225 degrees

A: 10)

Q: tan (-14) 3.

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Q: 9) cos e 270

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A: Formula:   .

Q: tan 60° cos 629 sin 26°

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A:

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Q: Determine if true sin 60°cos 45° +cos 60° sin 45° = sin 105

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Q: c) cos (315 °) d) sin (-30°) e) cos (330°) f) tan (150°) g) sin (225°) h) cos (210°)

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