Question

what is the reference angle of 5pi/4?

Answer 1

http://www.algebra.com/algebra/homework/Trigonometry-basics.faq.question.286551.html

:)

Answer 2

The reference angle is the angle used to find the trig value when you draw the triangle in the correct quadrant.

3pi/4 and 7pi/4 and 5pi/4 all use 45 degree reference angles

11pi/3 uses a reference angle of 60 degrees.

Hope this helps..

Answer 3

... you could also used even multiples of \(\pi/4\) such as \(2 \pi/4=\pi/2~or~90°\), \(4 \pi/4=\pi=180°\), \(6 \pi/4=3 \pi/2=270°\) and \(8 \pi/4=2 \pi=360°\)... this will further help to locate the quadrant of \(5 \pi/4\)...

Answer 4

The reference angle is the angle to the nearest x-axis.