In triangle ABC respectively. a Explain why b Show that ABC, lines CP, PQ and QR are drawn perpendicular to ∠RBQ = ∠RQP = ∠QPC. QR = a sin B cos2 B .

In triangle ABC respectively a Explain why b Show that ABC lines CP PQ and QR are drawn perpendicular to RBQ RQP QPC QR a sin B cos2 B class=