Limit Trigonometric Function Cos(pi X/2)/(1 - X) By Substitution

2017 4:37
Synopsis
Trig Identities Part 2: https://www.youtube.com/watch?v=rXPlGoGxeUs&list=PLJ-ma5dJyAqp2pdNqM1P4V4BZ1u4pI-Ob&index=2 ...
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