What statement explain whether haruto is correct

"Haruto is correct because the angle is coterminal with 3pi/4 and the reference angle is pi/4."

Step-by-step explanation:

Coterminal angle:

Coterminal Angles are angles who share the same initial side and terminal sides. Finding coterminal angles is as simple as adding or subtracting 360° or 2π to each angle, depending on whether the given angle is in degrees or radians.

Finding if 3pi/4 is coterminal with 19pi/4:

19pi/4

= 16pi/4  +  3pi/4

= 4pi  +  3pi/4

= 2(2pi)   +   3pi/4

= 2(360°) + 3pi/4

= 3pi/4

Hence they are coterminal.

Reference angle:

The smallest angle that the terminal side makes with x-axis.

3pi/4 falls in second quadrant.

In 2nd quadrant, reference angle is given as = pi - 3pi/4

reference angle = pi/4.

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