Question 1011315
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{{{pi/12}}} = {{{180/12}}} = 15°.


sin(15°) = {{{sqrt(2-sqrt(3))/2}}}.


See the lesson <A HREF=http://www.algebra.com/algebra/homework/Trigonometry-basics/Trigonometric-functions-of-half-argument-Examples.lesson>Trigonometric functions of half argument - Examples</A> in this site.