①sin(-π/4)②sin13/6π③cos5/4π④tan(-7/4π)⑤-cos(-300°)⑥sin495°

来源：学生作业帮助网 编辑：作业帮 时间：2024/06/03 16:45:51

①sin(-π/4)②sin13/6π③cos5/4π④tan(-7/4π)⑤-cos(-300°)⑥sin495°

①-√2/2②1/2③同① ④1⑤√3/3⑥同①