найти значение выражения (20 cos 228-sin42)/4 sin 498-sin 138
(20 cos 228-sin42)/4 sin 498-sin 138 =(-14.06)/2.44=(-5.77)
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(20 cos 228-sin42)/4 sin 498-sin 138 =(-14.06)/2.44=(-5.77)