68. Set the calculator to degree mode: ≈ cos14º 0.97 . ≈ 75. Set the calculator to radian mode: tan 5π 3.73 . 12 69. Set the calculator to degree mode: Set the calculator to radian mode: 76. tan 21º ≈ 0.38 π . 1 ≈ 5.67. π = cot 18 tan 18 Set the calculator to degree mode: 70. 77. Set the calculator to radian mode: cot 70º = 1 ≈ 0.36 . tan 70º sec π = 1 ≈ 1.04. 12 cos π 12 71. Set the calculator to degree mode: csc 55º = 1 ≈ 1.22 . sin 55º sec 41º = 1 ≈ 1.33 . cos 41º 78. Set the calculator to radian mode: csc 5π = 1 ≈ 1.07. 13 sin 5π 13 72. Set the calculator to degree mode: 79. Set the calculator to radian mode: sin 1 ≈ 0.84 . 73. Set the calculator to radian mode: sin π ≈ 0.31 . 10 80. Set the calculator to radian mode: tan 1 ≈ 1.56 . π ≈ 74. Set the calculator to radian mode: cos 0.92 . 8 81. Set the calculator to degree mode: sin 1º ≈ 0.02 .
68. Set the calculator to degree mode: cos14º ≈ 0.97 . 75. Set the calculator to radian mode: tan 5π ≈ 3.73 . 12 69. Set the calculator to degree mode: 76. Set the calculator to radian mode: tan 21º ≈ 0.38 . cot π = 1 ≈ 5.67. π 18 tan 18 70. Set the calculator to degree mode: cot 70º = 1 ≈ 0.36 . tan 70º 77. Set the calculator to radian mode: sec π = 1 ≈ 1.04. 12 cos π 12 71. Set the calculator to degree mode: sec 41º = 1 ≈ 1.33 . cos 41º 72. Set the calculator to degree mode: csc 55º = 1 ≈ 1.22 . sin 55º 78. Set the calculator to radian mode: csc 5π = 1 ≈ 1.07. 13 sin 5π 13 79. Set the calculator to radian mode: sin 1 ≈ 0.84 . 73. Set the calculator to radian mode: sin π ≈ 0.31 . 10 80. Set the calculator to radian mode: tan 1 ≈ 1.56 . 74. Set the calculator to radian mode: cos π ≈ 0.92 . 8 81. Set the calculator to degree mode: sin 1º ≈ 0.02 .