document.write( "Question 395392: Hi, please help me solve this problem:\r
\n" ); document.write( "\n" ); document.write( "Is this true of false: If alpha and beta are in standard position and cos alpha equals cos beta, then alpha and beta must be coterminal. \n" ); document.write( "

Algebra.Com's Answer #280770 by richard1234(7193) $\"\"$ $\"About$

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Not necessarily true. On the unit circle, the cosine is represented by the x-coordinate. For example, $\"pi%2F4\"$ , and $\"7pi%2F4\"$ have the same x-coordinate, and thus the same cosine value. However they are not co-terminal. \n" ); document.write( "

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