Question

Which equation can be used to determine the reference angle r if 7pi/12?

Answer 1

Answer:

Step-by-step explanation:

Alright, lets get started.

Please refer the diagram I have attached.

If we draw the given angle $\frac{7\pi }{12}$, the terminal side will be in second quadrant.

So the reference angle will be the angle between x axis and the terminal side of given angle.

For this, we have to subtract it from $\pi$

So the reference angle will be : $\pi-\frac{7\pi}{12}$

making common denominator

reference angle = $\frac{12\pi}{12}-\frac{7\pi}{12}$

reference angle = $\frac{5\pi}{12}$    :   Answer

Hope it will help :)

Answer 2

7pi/12 > pi/2, This means it is in 2nd quadrant.
For angles in 2nd quadrant, subtract from pi to get reference angle.

pi - 7pi/12 = 5pi/12