Q. 11. in a spherical triangle abc, if 0, y, be the axes of great circle drawna, b, cperpendicular to the opposite sides show that sina. sinu= sin b. sino sin c

Q. 11. In a spherical triangle ABC, if 0, Y, be the axes of great circle drawnA, B, Cperpendicular to the opposite sides show that sina. sinU= sin b. sino sin c. sin =(1-cosu-cos b-cos'c 2 cosa. cosb. cosc) muloa on ARID