Mathematics, 22.06.2019 11:30 ishmael9332

We have two angles, α and β. we know that -90°< α< β< 90° and that sen(180°+β)> 0. which expression is positive? a)sen α + sen β b)cos α - cos β c)cos α - tan β d) - cos β - tan β can someone show the solution step by step?

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We have two angles, α and β. we know that -90°< α< β< 90° and that sen(180°+β)> 0. whic...