document.write( "Question 1166011: for each of the following find the reference angle for the given angle and compute the given function value without a calculator.
\n" ); document.write( "theta =11pi/6 and cos(11pi/6)
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Algebra.Com's Answer #790486 by josgarithmetic(39617)\"\" \"About 
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\n" ); document.write( "compute the given function value without a calculator.
\n" ); document.write( "theta =11pi/6 and cos(11pi/6)\r
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\n" ); document.write( "\n" ); document.write( "You could simply say, \"find the value of \"cos%2811pi%2F6%29\", without using a calculator.\"\r
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\n" ); document.write( "\n" ); document.write( "See on the unit circle, \"11pi%2F6\" corresponds to \"-pi%2F6\". The sign of both those angles are the same (both are positive). Already recognize that cosine of this/these is \"sqrt%283%29%2F2\".
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