1.

In figure given below

A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 2 t</center></td></tr><tr><td style="text-align: center;">2t</td></tr></table>
B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 2 t</center></td><td rowspan="2"> &amp;plus;</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin t</center></td><td rowspan="2">cos 3 t</td></tr><tr><td style="text-align: center;">2t</td><td style="text-align: center;">t</td></tr></table>
C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 2 t</center></td><td rowspan="2"> &amp;plus;</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 0.5 t</center></td><td rowspan="2">cos 1.5 t</td></tr><tr><td style="text-align: center;">2t</td><td style="text-align: center;">t</td></tr></table>
D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 2 t</center></td><td rowspan="2"> &amp;plus;</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin t</center></td><td rowspan="2">cos 0.75 t</td></tr><tr><td style="text-align: center;">2t</td><td style="text-align: center;">t</td></tr></table>
Answer» D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin 2 t</center></td><td rowspan="2"> &amp;plus;</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>sin t</center></td><td rowspan="2">cos 0.75 t</td></tr><tr><td style="text-align: center;">2t</td><td style="text-align: center;">t</td></tr></table>


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