Question

How do you multiply and simplify `cosysiny(secy+cscy)`?

Answer 1

This expression simplifies to `siny + cosy`.

Explanation:

`=cosysiny(1/cosy + 1/siny)`

`=cosysiny(siny/(cosysiny) + cosy/(cosysiny))`

`=cosysiny((siny + cosy)/(cosysiny))`

`=siny + cosy`

Hopefully this helps!