Find the value of the following:

2 sin 45° . cos 45°

2

Find the value of the following:

cos 45° cos 60° – sin 45° sin 60°

3

Find the value of the following:

sin²30° + 2 cos²45° + 3 tan²60°

4

Find the value of the following:

3 sin 60° – 4 sin³60°

5

Find the value of the following: