In the diagram above, WZY is a straight line.
and WZ = XZ = 30 cm. Find the length of XY.
In the diagram above, PQS is a right angle triangle. Given that SR = 6cm, PQ = 12 cm and 5SR = 2PS. Find the value of cos α and tan β.
In the diagram above, ADC is a straight line, if
. Find the distance of AC.