+ sin π = 1 + 1 = 3 3 2 2 2 = sin 50º π cos (50°+ sin 360°) − π = ⋅ − ⋅ = − 3sin 45º 4 tan 3 2 4 3 3 2 11. = sin 50º 4 3 sin 50º 6 2 3 2 3 = 1 12. 26. 3 = 2 + 3 (−20°) ⋅ ⋅ tan 20º cos csc 20° 4 cos 60º +3 tan π = 4 ⋅ 1 + 3 3 ⋅ 2 = 1 = sin 20° ⋅ cos 20° 1 6 cos 3π + 2 tan ⎛ − π ⎞ = 6 ⎛ − 2 ⎞ + 2 13. (− ) ⋅ sin 20° 3 cos 20° 3 4 ⎝ 3 ⎠ ⎝ 2 ⎠ (−40º ) = −3 2 − 2 3 ⋅ csc 40° = − sin 40° ⋅ csc 40° 27. = − sin 40° ⋅ 1 (0) − = ⎞ − = 3sin 2π 4 cos 5π 3⎛ 3 4 3 sin 40º 14. = −1 sin 3 3 2 ⎝ 2 ⎠ 2 −20º =− ⋅ = −1 cot 20º tan 20º 1 tan 15. π ⎞ − cot ⎛ − 5π ⎞ = sec π + cot 5π = 2 + 1 = 3 tan 20º ( ) 28. sec ⎛ − ⎜ 3 ⎟ ⎜ 4 ⎟ 3 4 ⎝ ⎠ ⎝ ⎠
cos π + sin π = 1 + 1 = 3 3 2 2 2 = sin 50º sin (50°+ 360°) 11. 3sin 45º − 4 tan π = 3 ⋅ 2 − 4 ⋅ 3 = 3 2 − 4 3 6 2 3 2 3 = sin 50º sin 50º = 1 12. 4 cos 60º +3 tan π = 4 ⋅ 1 + 3 ⋅ 3 = 2 + 3 3 26. tan 20º ⋅ cos (−20°) ⋅ csc 20° 13. 3 2 6 cos 3π + 2 tan ⎛ − π ⎞ = 6 ⎛ − 2 ⎞ + 2 (− 3 ) = sin 20° ⋅ cos 20° ⋅ cos 20° = 1 1 sin 20° 4 ⎝ 3 ⎠ ⎝ 2 ⎠ 14. = −3 2 − 2 3 3sin 2π − 4 cos 5π = 3⎛ 3 ⎞ − 4 (0) = 3 3 27. sin (−40º ) ⋅ csc 40° = − sin 40° ⋅ csc 40° = − sin 40° ⋅ 1 sin 40º = −1 3 2 ⎝ 2 ⎠ 2 tan −20º cot 20º =− tan 20º ⋅ 1 = −1 15. sec ⎛ − π ⎞ − cot ⎛ − 5π ⎞ = sec π + cot 5π = 2 + 1 = 3 28. ( ) tan 20º ⎜ 3 ⎟ ⎜ 4 ⎟ 3 4 ⎝ ⎠ ⎝ ⎠
62514-0132318806_ISM_02-1.docx