In triangle PQR, PQ = 15 cm, PR = 10 cm and angle PQR = 40 degrees
i) Show that sin R = 0.9642 to 4 d.p.
ii) Illustrate on a sketch the two possible configurations of triangle PQR.
iii) Find the area of the smaller triangle PQR.
I seriously dont even know how to do (i)!
Can anyone please help me?