49-58 - Value of Expressions Find the exact value of the expression. 49. cos 15° 50. sin 12 51. tan 8 52. 2 sin cos 12 53. sin 5° cos 40° + cos 5° sin 40° tan 66° - tan 6° 54. 1+ tan 66° tan 6° 55. сos" sin 8 56. cos 12 sin 2 57. cos 37.5° cos 7.5" 58. cos 67.5° + cos 22.5°

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