Question

How do you simplify `cos35sin55 + cos55sin35`?

Answer 1

1

Explanation:

`cos35sin55 + cos55sin35`

`=sin55cos35 + cos55sin35`

Applying formula `SinAcosB+CosA sinB= sin(A+B)`

we get

`=sin55cos35 + cos55sin35=sin(55+35)=sin90=1`