Answer:

Step-by-step explanation:

Double negative = Positive:

Apply negative exponent formula:

Multiply:

Apply exponent rule: 
Thus, 
Simplify:

Answer:
<h2> I am not so good at drawing .</h2><h3>BE = 3.6</h3>
Cos ( 390)
- 4 cot (-45)
Csc (60)
Hope this helps