Question

Find the exact value of each expression.

sin 36° cos 9° + cos 36° sin 9°

Answer 1

sin(36+9)=sin(45)

Answer 2

\[
\sin(45)=\frac{\sqrt 2}{2}
\]

Answer 3

sin(a+b)= sin(a)cos(b) + sin(b)cos(a)

Answer 4

Thank you! :)