Question 999289
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The  values of  ....sin75. ...
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sin(75°) = cos(15°).


cos(15°) = {{{sqrt((2 + sqrt(3))/2)}}}.


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