1.

The value of cos

A.
B. <span style=" text-decoration: overline;">2</span>
C. 2
D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td></tr></table>
E. 1
Answer» E. 1


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