document.write( "Question 1030470: I have to find the exact value for this trigonometric expression. Help? :(
\n" ); document.write( "cos^-1 (cos (7π/6)) = ??
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Algebra.Com's Answer #645340 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
Hi there,
\n" ); document.write( "cos^-1 = 1/cos(7π/6)
\n" ); document.write( "= -2√3/3
\n" ); document.write( "Hope this is what you want.
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