Point out how it follows from expressions (15) and ( 16) in Sec. 37 for I sin.:: 1 2 and jcos: 1 2 that (Cl) lsin.::I =:- lsinxl: (/>) jcos.:: I .:: jcos x I.
9/30/2017 8C17D7B929924F82B216BF8ABBAF1A69.png https://mail.google.com/mail/u/0/#inbox/15ed44902ae5e6e9projector=1 1/1 9/30/2017 93E13662730E4EEE96531A09EFCC16CB.png https://mail.google.com/mail/u/0/#inbox/15ed44902ae5e6e9projector=1 1/1 9/30/2017 8C17D7B929924F82B216BF8ABBAF1A69.png