#1**+1 **

\(s = 90^{\circ} - u\\ u = 90^{\circ} - s\\ t = 90^{\circ} - q\\ q = 90^{\circ} - t\\ p = 90^{\circ} - r\\ r = 90^{\circ} - p\\\)

Actually, by the properties of rectangle:

\(q = r = u = 90^{\circ} - t = 90^{\circ} - p = 90^{\circ} - s\).

\(\text{Therefore the following are true:}\\ \cos p = \sin u\\ \cos t = \sin u\\ \cos p = \sin q\\ \cos q = \sin t\\ \)

.MaxWong Mar 12, 2019

#1**+1 **

Best Answer

\(s = 90^{\circ} - u\\ u = 90^{\circ} - s\\ t = 90^{\circ} - q\\ q = 90^{\circ} - t\\ p = 90^{\circ} - r\\ r = 90^{\circ} - p\\\)

Actually, by the properties of rectangle:

\(q = r = u = 90^{\circ} - t = 90^{\circ} - p = 90^{\circ} - s\).

\(\text{Therefore the following are true:}\\ \cos p = \sin u\\ \cos t = \sin u\\ \cos p = \sin q\\ \cos q = \sin t\\ \)

MaxWong Mar 12, 2019