Reference angle

Question

225 degree has reference angle of what degrees

338 degrees has reference angle of what degrees?

-140 degree has reference angle of what degree?

Answer 1

(1)

The standard angle is .

Reference angle:

If be an angle in standard position, its reference angle is the acute angle formed by the

terminal side of , and the horizontal axis.

if in Third quadrant then .

The reference angle is

Answer 2

(2)

The standard angle is .

Reference angle:

If be an angle in standard position, its reference angle is the acute angle formed by the

terminal side of , and the horizontal axis.

if in Fourth quadrant then .

The reference angle is

Answer 3

(3)

The standard angle is .

Reference angle:

If be an angle in standard position, its reference angle is the acute angle formed by the

terminal side of , and the horizontal axis.

if in First quadrant then .

The reference angle is