1.

If A, B and C be the angles of a triangle, then put of the following, the incorrect relation is :

A. <table><tr><td rowspan="2">sin</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>A + B</center></td><td rowspan="2">= cos<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>C</center></td><td rowspan="2"></td></tr><td align="center">2</td><td align="center">2</td></table>
B. <table><tr><td rowspan="2">cos</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/aptitude/1-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">A + B</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"> </td><td rowspan="2">= sin</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">C</td><td rowspan="2"></td></tr><tr><td style="text-align: center;">2</td><td style="text-align: center;">2</td></tr></table>
C.
D. <table><tr><td rowspan="2">tan</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/aptitude/1-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">A + B</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"> </td><td rowspan="2">= sec</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">C</td><td rowspan="2"></td></tr><tr><td style="text-align: center;">2</td><td style="text-align: center;">2</td></tr></table>
E. <table><tr><td rowspan="2">cot</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/aptitude/1-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">A + B</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"> </td><td rowspan="2">= tan</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">C</td><td rowspan="2"></td></tr><tr><td style="text-align: center;">2</td><td style="text-align: center;">2</td></tr></table>
Answer» D. <table><tr><td rowspan="2">tan</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/aptitude/1-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">A + B</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"> </td><td rowspan="2">= sec</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">C</td><td rowspan="2"></td></tr><tr><td style="text-align: center;">2</td><td style="text-align: center;">2</td></tr></table>


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