12/08/29 01:01:27.97
>>3
> sin(a±b)=sin(a)cos(b)±cos(a)sin(b) [加法定理]
> cos(a±b)=cos(a)cos(b)干sin(a)sin(b)
12/08/29 01:01:27.97
>>3
> sin(a±b)=sin(a)cos(b)±cos(a)sin(b) [加法定理]
> cos(a±b)=cos(a)cos(b)干sin(a)sin(b)
12/08/29 01:01:27.97
>>3
> sin(a±b)=sin(a)cos(b)±cos(a)sin(b) [加法定理]
> cos(a±b)=cos(a)cos(b)干sin(a)sin(b)