My Math Forum A verification problem

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 June 16th, 2017, 06:12 AM #1 Senior Member   Joined: May 2014 From: Allentown PA USA Posts: 103 Thanks: 6 Math Focus: dynamical systen theory A verification problem Dear MyMathForum Community: How do you verify the following? (tan^2) x * (sin^2) x = (tan^2) x + (cos^2) x - 1. Thank you. Best regards, Carl Mesaros
 June 16th, 2017, 06:32 AM #2 Global Moderator   Joined: Dec 2006 Posts: 18,417 Thanks: 1462 tan²x * sin²x = tan²x * (1 - cos²x) = tan²x - sin²x = tan²x + cos²x - 1 Thanks from Carl James Mesaros
 June 17th, 2017, 07:29 AM #3 Senior Member   Joined: May 2014 From: Allentown PA USA Posts: 103 Thanks: 6 Math Focus: dynamical systen theory A Thank you Dear skipjack: Thank you for the answer to this thread. Ah, so many times I cannot see the forest for the trees! Best regards, Carl Mesaros

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