October 24th, 2017, 03:17 PM  #1 
Newbie Joined: Oct 2017 From: Brazil Posts: 3 Thanks: 0  Trigonometry
Express “cos a” and “sin b” in terms of A and B if: sin a = A sin b, tg a = B tg b.
Last edited by maluneves12; October 24th, 2017 at 03:29 PM. 
October 24th, 2017, 05:52 PM  #2 
Math Team Joined: May 2013 From: The Astral plane Posts: 1,659 Thanks: 652 Math Focus: Wibbly wobbly timeywimey stuff. 
Lots of questions. We can help you better if you show us what you have been able to do on these three. What have you tried? Dan 

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