4.3 Opener

The entire bellwork is no calculator

1

Using cofunctions:
cos33°=

1

Using cofunctions:
cot18°=

1

cos 74° = cos 60° cos 14° +sin 60° sin 14°

True

False

1

cos 70° sin 200° + sin 70° cos 200° = -1

True

False

Problems 5 and 6:

Using this information, find each of the following:

1

sin(s+t)=

1

Using cofunctions:
cos33°=

Using cofunctions:
cot18°=

4.3 Opener

Using cofunctions:
cos33°=

Using cofunctions:
cot18°=

cos 74° = cos 60° cos 14° +sin 60° sin 14°

cos 70° sin 200° + sin 70° cos 200° = -1

sin(s+t)=

cos(s-t)=

cos 74° = cos 60° cos 14° +sin 60° sin 14°

cos 70° sin 200° + sin 70° cos 200° = -1

sin(s+t)=

cos(s-t)=

4.3 Opener

Using cofunctions: cos33°=

Using cofunctions: cot18°=

4.3 Opener

Using cofunctions: cos33°=

Using cofunctions: cot18°=

cos 74° = cos 60° cos 14° +sin 60° sin 14°

cos 70° sin 200° + sin 70° cos 200° = -1

sin(s+t)=

cos(s-t)=

cos 74° = cos 60° cos 14° +sin 60° sin 14°

cos 70° sin 200° + sin 70° cos 200° = -1

sin(s+t)=

cos(s-t)=

Using cofunctions:
cos33°=

Using cofunctions:
cot18°=

Using cofunctions:
cos33°=

Using cofunctions:
cot18°=