Question

calculate the number of images formed by plane mirrors kept at an angleof 10degree to each other in 30 words

Answer 1

no of images=360/angle from normal -1
                     =360/10-1
                     =36-1
                     =35
therefore the number of images formed will be 35

Answer 2

number of images formed = [360/theta(angle of inclination)]-1
(360/10)-1
no of images formed = 35