In Problems 71-80, solve each equation on the interval 0s0< 2m. 71. cos (20) + 6 sin e = 4 72. cos (20) = 2 – 2 sin? e 73. cos (20) = cos e 74. sin (20) = cos e 75. sin (20) + sin (40) = 0 76. cos (20) + cos ( 40) = 0 77. 3 - sin 0 = cos (20) 78. cos (20) + 5 cos 0 + 3 = 0 79. tan (20) + 2 sin 0 = 0 80. tan (20) + 2 cos 0 = 0 Mixed Practice

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