Pi/6 is the reference angle for:

3pi/6

5pi/6

13pi/6

8pi/6

Step by step

Remember, a reference angle is a positive acute angle that represents an angle θ of any measurement.

a)

, then its reference angle is

b)

is in the second cuadrant, then its reference angle is

c)

, then it is in the first cuadrant and the reference angle is .

d)

and it is in the third cuadrant, then its reference angle is

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4