Question

Evaluate sin16° cos29° + cos16° sin29°

Answer 1

This is what it is about:

http://www.youtube.com/watch?v=zw0waJCEc-w

sin 45 = (1/2)sqrt 2

Answer 2

Did you notice 16+29 = 45 ?
so
sin16° cos29° + cos16° sin29°
= sin(16+29)
= sin 45
= 1/√2 or √2/2