Question

can anyone help me with finding reference angles?

Answer 1

Assume angle A is postive and less than 360 o (2Pi), we have 4 possible cases:

1. If angle A is in quadrant I then the reference angle
A r = A.

2. If angle A is in quadrant II then the reference angle
A r = 180 o - A if A is given degrees
and
A r = Pi - A if A is given in radians.

3. If angle A is in quadrant III then the reference angle
A r = A - 180 o if A is given degrees
and
A r = A - Pi if A is given in radians.

4. If angle A is in quadrant IV then the reference angle
A r = 360 o - A if A is given degrees
and
A r = 2Pi - A if A is given in radians.

Answer 2

any questions?

Answer 3

no, thanks for your response

:)