sin3(-α)cos(2π+α)tan(-α-π)化简

问题描述:

sin3(-α)cos(2π+α)tan(-α-π)化简

sin3(-α)cos(2π+α)tan(-α-π)
=-sin3a*cosa*(-tana)
=sin3a*sina
=

sin3(-α)cos(2π+α)tan(-α-π)
=-sin3acosa-tana
=sin3acosatana
=sin3asina