As theta increases from -theta/2 to 0 radians, the value of cos theta will
1. decrease form 1 to 0
2. decrease from 0 to -1
3. increase from -1 to 0
4. increase from 0 to 1

Step-by-step explanation:

By trigonometric conversion,

Cos -90° = 0

Cos -60° = 0.5

Cos -30° = 0.866

Cos 0° = 1

From the above values, Cos -90° to Cos 0° = 0 to 1

As theta increases from to 0, the value of cos theta will increase from 0 to 1 (Option 4)

just needed some points but try socratic

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)