Question 1186265
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If cos α= -1/2 then find sin α if tan α is negative.
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<pre>
As described,  the angle  {{{alpha}}}  is in the 2-nd quadrant  and is equal to  {{{2pi/3}}}.


Hence,  {{{sin(alpha)}}} = {{{sqrt(3)/2}}}.    <U>ANSWER</U>
</pre>


Solved.