化简【cos(a +2π ) * tan(a +π )】/sin (a -2π)的值为 很急,会的帮个忙,谢谢
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化简【cos(a+2π)*tan(a+π)】/sin(a-2π)的值为很急,会的帮个忙,谢谢化简【cos(a+2π)*tan(a+π)】/sin(a-2π)的值为很急,会的帮个忙,谢谢化简【cos(a
化简【cos(a +2π ) * tan(a +π )】/sin (a -2π)的值为 很急,会的帮个忙,谢谢
化简【cos(a +2π ) * tan(a +π )】/sin (a -2π)的值为 很急,会的帮个忙,谢谢
化简【cos(a +2π ) * tan(a +π )】/sin (a -2π)的值为 很急,会的帮个忙,谢谢
【cos(a +2π ) * tan(a +π )】/sin (a -2π)
=cos(a)tan(a)/sin (a)
=cos(a)sin(a)/sin (a)cos(a)
=1