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2.  

3. -0.28

4. a.

b.

Step-by-step explanation:

2. Given that  

⇒ or  

Since x belongs to [0,2π).

Therefore, (Answer)

3. Given that,  

⇒ Degrees  

{Since is in first quadrant}

So, (Answer)

4. a. Given

b. (Answer)

(23*2)-12=x     x=34

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)