The entire bellwork is no calculator
Using cofunctions:
cos33°=
cot18°=
cos 74° = cos 60° cos 14° +sin 60° sin 14°
True
False
cos 70° sin 200° + sin 70° cos 200° = -1
Problems 5 and 6:
Using this information, find each of the following:
sin(s+t)=
cos(s-t)=