化简1+tanα×tan(α/2)
问题描述:
化简1+tanα×tan(α/2)
答
1+tanα×tan(α/2)
= (cosαcos(α/2) + sinαsin(α/2))/cosαcos(α/2)
= (cos(α-α/2))/cosαcos(α/2)
= cos(α/2)/cosαcos(α/2)
= 1/cosα