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Comment Unit Circle (Score 1) 966 966

My question is, does it do away with the unit cirle and being required to no how many radians is in say 30 degrees (I believe that was PI/6 Rads). That thing was a pain in the ass to memorize. However it was neccesary to use radians. I wonder how his book will confront the use of radians with just simple algebra.

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