1.

sin 5 + sin 6 + ... + sin 84 + sin 85 = ?

A. <table><tr><td rowspan="2">39</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><td align="center">2</td></table>
B. <table><tr><td rowspan="2">40</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><td align="center">2</td></table>
C. 40
D. <table><tr><td rowspan="2">39</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><td align="center"> <span style=" text-decoration: overline;">3</span><br></td></table>
Answer» C. 40


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