Answer:
hints to solve each. partial answer due to lack of time, hope it helps!
Step-by-step explanation:
1)
a) solve ():
5
+ 7
- 9
- 6
+ 12
- 10
=
. (5 +7-9-6+12-10)
b) use
= 

c) use
= 
= 2
use
= 
= 2
2)
a) use
= 

use
= 
= 2
Answer is A
8-4/4-2 = 4/2 = 2
This is what I got - csc pi/2 - 1 ( on 29 ) and cot pi/4+1 ( on 27 )