math home work with show work i need it in 13 hours

Math 1720 Section 003 (2014S) (HW 7.4B) Date: __________________________________

Name__________________________ Class ID:________________________________

Please write neatly and show all work.

1. Find Exact Values of: a) cos

2 (75°)- sin

2 (75°)

b) 1- 2sin 2 ( )

8

π−

c) 2cos 2 (22.5°) – 1

d) 2sin ) 12

( π

cos ) 12

( π

e) )15(tan1

)15tan(2 2

°−−

°−

f) ) 8

tan( π

2. Verify the following identity: x xx

sin1) 2

cos 2

(sin 2

+=+

3. Work 7.4 Excises: 7, 11, 13, 15, 17, 18, 19, 21, 57, 59, 65, 67