document.write( "Question 1102370: If cos(t)=-5/6 where pi < t < 3pi/2 , find the values of the following trigonometric functions.
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\n" ); document.write( "cos(2t) =
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\n" ); document.write( "cos(t/2)=
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Algebra.Com's Answer #717051 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
Look up \"Half angle formulas\" on Wikipedia.
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