What follows is a last-minute addendum to Section 2.2.2, as this book goes to press. ** Trig** is an option for the algebraic transformation functions (introduced in Section 2.2.1) except

`ComplexExpand`

`PowerExpand`

`Trig -> True`

`Trig -> False`

`Trig -> False`

`Simplify`

`FullSimplify`

`Trig -> True`

`Apart`

In[1]:=Apart[2 (Cos[α]- Cos[β]) Csc[α] Csc[β]]Out[1]= 2(Cos[α]- Cos[β]) Csc[α] Csc[β]]

With ** Trig -> True, Apart** rewrites the trigonometric expression: ...

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