(Sina²)²-(Cosa²)²=Sina²-Cosa²详细解释,为什么它两等于呢?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 05:29:04
![(Sina²)²-(Cosa²)²=Sina²-Cosa²详细解释,为什么它两等于呢?](/uploads/image/z/14897577-57-7.jpg?t=%28Sina%26%23178%3B%29%26%23178%3B%EF%BC%8D%28Cosa%26%23178%3B%29%26%23178%3B%3DSina%26%23178%3B%EF%BC%8DCosa%26%23178%3B%E8%AF%A6%E7%BB%86%E8%A7%A3%E9%87%8A%2C%E4%B8%BA%E4%BB%80%E4%B9%88%E5%AE%83%E4%B8%A4%E7%AD%89%E4%BA%8E%E5%91%A2%3F)
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(Sina²)²-(Cosa²)²=Sina²-Cosa²详细解释,为什么它两等于呢?
(Sina²)²-(Cosa²)²=Sina²-Cosa²详细解释,为什么它两等于呢?
(Sina²)²-(Cosa²)²=Sina²-Cosa²详细解释,为什么它两等于呢?
左边=(Sina²+Cosa²)(Sina²-Cosa²)
而Sina²+Cosa²=1,所以左右相等